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{{#Wiki_filter:This overview white paper is being released to support ongoing public discussions concerning the development of preliminary proposed rule language. This white paper has not been subject to complete NRC management or legal review, and its contents should not be interpreted as official agency positions. The NRC staff continues to work on the preliminary proposed rule language described in this document and continues to welcome public participation in these the rulemaking activities.
{{#Wiki_filter:This overview white paper is being released to support ongoing public discussions concerning the development of preliminary proposed rule language. This whi te paper has not been subject to complete NRC management or legal review, and its contents sh ould not be interpreted as official agency positions. The NRC staff continues to work on the preliminary proposed rule language described in this document and continues to welcome pu blic participation in these the rulemaking activities.
Part 53 Framework B Development Process and Provisions Overview The Nuclear Regulatory Commission (NRC) staff is developing optional regulatory frameworks to support eventual licensing of commercial nuclear plants through the proposed addition of a new part (Part 53) in Title 10 of the Code of Federal Regulations (10 CFR).1 The existing regulatory frameworks in 10 CFR Part 50 (Part 50) and 10 CFR Part 52 (Part 52) are currently being used for licensing new reactor technologies, but they were developed largely to accommodate the design and licensing of large, light-water reactors (LWRs). Part 53 would provide technology-inclusive regulations using methods of evaluation that are flexible and practicable for application to a variety of advanced reactor technologies, such as high-temperature gas and molten salt reactors. This would, in turn, help to reduce the need for non-LWR applicants to apply exemptions from certain existing LWR-specific requirements.
 
Preliminary proposed Part 53 language includes two distinct licensing framework options:
Part 53 Framework B Development Process and Provisions Overview
* Framework A: Requirements would support an iterative approach to design and licensing where a Probabilistic Risk Assessment (PRA) is used in a leading manner.
 
Functional design criteria informed by a PRA are established to ensure that high-level safety and design requirements are satisfied. Framework A leverages many of the principles developed as part of the licensing modernization project as outlined in Nuclear Energy Institute Report 18-04,2 and NRC Regulatory Guide (RG) 1.233.3
The Nuclear Regulatory Commission (NRC) staff is developing opt ional regulatory frameworks to support eventual licensing of commercial nuclear plants thro ugh the proposed addition of a new part (Part 53) in Title 10 of the Code of Federal Regulations (10 CFR).1 The existing regulatory frameworks in 10 CFR Part 50 (Part 50) and 10 CFR Pa rt 52 (Part 52) are currently being used for licensing new reactor technologies, but they wer e developed largely to accommodate the design and licensing of large, light-water reac tors (LWRs). Part 53 would provide technology-inclusive regulations using methods of evaluation that are flexible and practicable for application to a variety of advanced reactor te chnologies, such as high-temperature gas and molten salt reactors. This would, in turn, help to reduce the need for non-LWR applicants to apply exemptions from certain existing LWR-sp ecific requirements.
 
Preliminary proposed Part 53 language includes two distinct lic ensing framework options:
* Framework A: Requirements would support an iterative approach to design and licensing where a Probabilistic Risk Assessment (PRA) is used i n a leading manner.
Functional design criteria informed by a PRA are established to ensure that high-level safety and design requirements are satisfied. Framework A lever ages many of the principles developed as part of the licensing modernization pro ject as outlined in Nuclear Energy Institute Report 18-04,2 and NRC Regulatory Guide (RG) 1.233. 3
* Framework B: Requirements would support a traditional approach to design and licensing where deterministic safety analyses are complemented by risk insights; risk insights may also be used to confirm the results of traditional safety analyses. Principal design criteria are established in the initial stages of design and licensing and subsequent design activities are performed to ensure that these criteria are met.
* Framework B: Requirements would support a traditional approach to design and licensing where deterministic safety analyses are complemented by risk insights; risk insights may also be used to confirm the results of traditional safety analyses. Principal design criteria are established in the initial stages of design and licensing and subsequent design activities are performed to ensure that these criteria are met.
Framework B also provides for the optional use of an Alternate Evaluation for Risk Insights (AERI) approach if certain criteria are satisfied to demonstrate that the bounding accident of such a facility would be of very low consequence.
Framework B also provides for the optional use of an Alternate Evaluation for Risk Insights (AERI) approach if certain criteria are satisfied to d emonstrate that the bounding accident of such a facility would be of very low consequence.
 
1 This rulemaking was initiated, in part, in response to Congressional direction in the Nuclear Energy Innovation and Modernization Act, Pub. L. No. 115-439, § 103(a)(4), 132 Stat. 5565, 5572 (Jan. 14, 2019)
1 This rulemaking was initiated, in part, in response to Congressional direction in the Nuclear Energy Innovation and Modernization Act, Pub. L. No. 115-439, § 103(a)(4), 132 Stat. 5565, 5572 (Jan. 14, 2019)
(codified at 42 U.S.C. § 2133 note).
(codified at 42 U.S.C. § 2133 note).
2 Nuclear Energy Institute Technical Report 18-04, Revision 1. Risk-Informed Performance-Based Technology Inclusive Guidance for Non-Light Water Reactor Licensing Basis Development. August 2019 (ML19241A336).
2 Nuclear Energy Institute Technical Report 18-04, Revision 1. Risk-Informed Performance-Based Technology Inclusive Guidance for Non-Light Water Reactor Licensing Basis Development. August 2019 (ML19241A336).
3 Regulatory Guide (RG) 1.233, Revision 0. Guidance for a Technology-Inclusive, Risk-Informed, and Performance-Based Methodology to Inform the Licensing Basis and Content of Applications for Licenses, Certifications, and Approvals for Non-Light Water Reactors. June 2020 (ML20091L698).
3 Regulatory Guide (RG) 1.233, Revision 0. Guidance for a Technology-Inclusive, Risk-Informed, and Performance-Based Methodology to Inform the Licensing Basis and Content of Applications for Licenses, Certifications, and Approvals for Non-Light Water Reactors. June 2020 (ML20091L698).
Framework A preliminary proposed rule language development is largely complete. The second consolidated iteration of preliminary proposed rule language for Framework A was issued in May 2022 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML22125A000).
 
The NRC staff is preparing a consolidated draft proposed rule package with both frameworks to be provided to the Commission in February 2023. In the interim, the NRC staff continues to provide opportunities for stakeholders to provide feedback and comments on preliminary proposed rule language4 and supports additional stakeholder interactions through public meetings.
Framework A preliminary proposed rule language development is l argely complete. The second consolidated iteration of preliminary proposed rule language fo r Framework A was issued in May 2022 (Agencywide Documents Access and Management System (AD AMS) Accession No. ML22125A000).
 
The NRC staff is preparing a consolidated draft proposed rule p ackage with both frameworks to be provided to the Commission in February 2023. In the interim, the NRC staff continues to provide opportunities for stakeholders to provide feedback and comments on preliminary proposed rule language4 and supports additional stakeholder interactions through publi c meetings.


===Background===
===Background===
Framework B was developed in response to stakeholder feedback regarding the need for additional flexibility in the use of PRA in Part 53. Framework B development was also motivated by stakeholder feedback suggesting that some reactor vendors may initially pursue international markets where licensing frameworks are informed by international safety standards and guidelines that more closely align with traditional paradigms in Part 50 and Part 52. Therefore, an internationally licensed design could subsequently be licensed domestically under a traditional framework, such as Framework B, without the need for major changes to the design approach.
Framework B was developed in response to stakeholder feedback r egarding the need for additional flexibility in the use of PRA in Part 53. Framework B development was also motivated by stakeholder feedback suggesting that some reactor vendors ma y initially pursue international markets where licensing frameworks are informed by internationa l safety standards and guidelines that more closely align with traditional paradigms i n Part 50 and Part 52. Therefore, an internationally licensed design could subsequently be licens ed domestically under a traditional framework, such as Framework B, without the need fo r major changes to the design approach.
Efforts to develop a traditional licensing framework in Part 53 began in mid- to late-2021 with the Part 5X effort which proposed technology-inclusive alternatives to some of the technical requirements in Parts 50 and 52. The initial iteration of the Part 5X rule text was included within the Part 53 consolidated draft preliminary proposed rule text package issued in February 2022 (ADAMS Accession No. ML22024A066). The Part 5X rule text, including feedback received on the Part 5X rule text during stakeholder interactions in 2021, was leveraged to develop certain Framework B technical content of application requirements. For example, the accident analysis and initiating event requirements in paragraph § 53.4730(a)(5) of the draft preliminary proposed rule text was informed by the Part 5X effort.
 
Development Methodology The NRC staff employed the following approach for developing Framework B requirements:
Efforts to develop a traditional licensing framework in Part 53 began in mid-to late-2021 with the Part 5X effort which proposed technology-inclusive alternativ es to some of the technical requirements in Parts 50 and 52. The initial iteration of the P art 5X rule text was included within the Part 53 consolidated draft preliminary proposed rule text p ackage issued in February 2022 (ADAMS Accession No. ML22024A066). The Part 5X rule text, inclu ding feedback received on the Part 5X rule text during stakeholder interactions in 2021, was leveraged to develop certain Framework B technical content of application requirements. For example, the accident analysis and initiating event requirements in paragraph § 53.4730(a)(5) of the draft preliminary proposed rule text was informed by the Part 5X effort.
* Adopt Framework A requirements when the Framework A requirements are independent of the analysis methodology (e.g., decommissioning).
 
o   The NRC staff used direct cross-references to Framework A, where possible.
Development Methodology
o   Where direct cross-references could not be used, Framework A provisions were copied to Framework B with updated internal cross-references, terminology, etc.
 
* Assess if existing requirements in Parts 50 and 52 are technology inclusive. If so, adopt them directly by copying the existing requirements into Framework B. In some instances, provisions from Parts 50 and 52 were not copied into Framework B, but were used by 4
The NRC staff employed the following approach for developing Fr amework B requirements:
For information on how to submit comments go to https://www.regulations.gov and search for Docket ID NRC-2019-0062 drafting conforming changes in the existing requirements and including a reference to these requirements in Framework B.
* Adopt Framework A requirements when the Framework A requiremen ts are independent of the analysis methodology (e.g., decommissioning).
* Develop unique, technology-inclusive requirements corresponding, where appropriate, to existing requirements in Parts 50 and 52. Consider state-of-practice technical and policy initiatives and, as appropriate and consistent with Commission policy, approaches used in international standards.
 
A table summarizing the results of this development process, including the source of Framework B requirements and reason for deviations from the source, as applicable, is provided in . Enclosure 1 reveals that a majority of Framework B preliminary proposed rule language is derived from Framework A or Parts 50 and 52. The NRC staff notes that there are instances where Frameworks A and B are intended to be identical or similar, but may have diverged slightly due to the timing between when the most recent iteration of each framework was released. These deviations will be reconciled when the frameworks are merged.
o The NRC staff used direct cross-references to Framework A, whe re possible.
Structure Like Framework A, Framework B was developed to establish a standalone set of requirements covering the entire lifecycle of a commercial nuclear plant. Therefore, Framework A was used as a starting point for establishing the structure of Framework B. As shown in Table 1, Framework A and B structures are largely parallel.
 
Table 1: Part 53 Organization Framework A Framework B Subpart Title Subpart            Subpart General Provisions                                                             Subpart A (Common)
o Where direct cross-references could not be used, Framework A p rovisions were copied to Framework B with updated internal cross-references, t erminology, etc.
Technology-Inclusive Safety Requirements                                   Subpart B Note (1)
* Assess if existing requirements in Parts 50 and 52 are technol ogy inclusive. If so, adopt them directly by copying the existing requirements into Framewo rk B. In some instances, provisions from Parts 50 and 52 were not copied into Framework B, but were used by
Design and Analysis Requirements                                           Subpart C Siting Requirements                                                       Subpart D           Note (2)
 
Definitions                                                                 Note (3)         Subpart N Construction and Manufacturing Requirements                               Subpart E         Subpart O Requirements for Operation                                                 Subpart F         Subpart P Decommissioning Requirements                                               Subpart G         Subpart Q Licenses, Certifications, and Approvals                                   Subpart H         Subpart R Maintaining and Revising Licensing Basis Information                       Subpart I         Subpart S Reporting and Other Administrative Requirements                           Subpart J         Subpart T Quality Assurance Criteria                                                 Subpart K         Subpart U Notes:
4 For information on how to submit comments go to https://www.regulations.gov and search for Docket ID NRC-2019-0062
 
drafting conforming changes in the existing requirements and in cluding a reference to these requirements in Framework B.
* Develop unique, technology-inclusive requirements correspondin g, where appropriate, to existing requirements in Parts 50 and 52. Consider state-of-pra ctice technical and policy initiatives and, as appropriate and consistent with Commission policy, approaches used in international standards.
 
A table summarizing the results of this development process, in cluding the source of Framework B requirements and reason for deviations from the source, as ap plicable, is provided in. Enclosure 1 reveals that a majority of Framework B preliminary proposed rule language is derived from Framework A or Parts 50 and 52. The NR C staff notes that there are instances where Frameworks A and B are intended to be identical or similar, but may have diverged slightly due to the timing between when the most recen t iteration of each framework was released. These deviations will be reconciled when the fram eworks are merged.
Structure
 
Like Framework A, Framework B was developed to establish a stan dalone set of requirements covering the entire lifecycle of a commercial nuclear plant. Th erefore, Framework A was used as a starting point for establishing the structure of Framework B. As shown in Table 1, Framework A and B structures are largely parallel.
 
Table 1: Part 53 Organization
 
Subpart Title Framework A Framework B Subpart Subpart General Provisions Subpart A (Common)
Technology-Inclusive Safety Requirements Subpart B Note (1)
Design and Analysis Requirements Subpart C Siting Requirements Subpart D Note (2)
Definitions Note (3) Subpart N Construction and Manufacturing Requirements Subpart E Subpart O Requirements for Operation Subpart F Subpart P Decommissioning Requirements Subpart G Subpart Q Licenses, Certifications, and Approvals Subpart H Subpart R Maintaining and Revising Licensing Basis Information Subpart I Subpart S Reporting and Other Administrative Requirements Subpart J Subpa rt T Quality Assurance Criteria Subpart K Subpart U Notes:
(1) Framework B does not include separate subparts for safety and design requirements. These are largely captured by the requirements in Subpart R in a manner similar to how technical requirements are captured for the various application types in Parts 50 and 52 as part of the technical content of application requirements for a given application type.
(1) Framework B does not include separate subparts for safety and design requirements. These are largely captured by the requirements in Subpart R in a manner similar to how technical requirements are captured for the various application types in Parts 50 and 52 as part of the technical content of application requirements for a given application type.
(2) Framework B does not include a separate subpart for siting requirements. The siting requirements in 10 CFR Part 100 are used instead, consistent with the treatment of siting in Parts 50 and 52.
(2) Framework B does not include a separate subpart for siting requirements. The siting requirements in 10 CFR Part 100 are used instead, consistent with the treatment of siting in Parts 50 and 52.
(3) The most recent iteration of Framework A issued in May 2022 does not include a separate subpart for framework-specific definitions. It is expected that definitions specific to Framework A will be included within an existing Framework A subpart as the preliminary proposed rule language is further refined.
(3) The most recent iteration of Framework A issued in May 2022 does not include a separate subpart for framework-specific definitions. It is expected that definitions specific to Framework A will be included within an existing Framework A subpart as the preliminary proposed rule language is further refined.
Subpart A: General Provisions Provides a scope and purpose statement, definitions of terms common to Frameworks A and B, and other provisions common to both frameworks (e.g., written communications, employee protection, specific exemptions).
 
Subpart A: General Provisions Provides a scope and purpose statement, definitions of terms co mmon to Frameworks A and B, and other provisions common to both frameworks (e.g., written c ommunications, employee protection, specific exemptions).
 
Subpart N: Definitions Provides definitions that are unique to Framework B.
Subpart N: Definitions Provides definitions that are unique to Framework B.
Subpart O: Construction and Manufacturing Requirements Provides requirements regarding construction and manufacturing activities; requirements are consistent with Framework A Subpart E except for internal references.
 
Subpart P: Requirements for Operation Provides requirements regarding plant operations, including plant personnel, maintenance, and programs. The structure of Subpart P parallels Framework A Subpart F in with some exceptions. These exceptions include certain programmatic requirements derived from the traditional licensing frameworks in Parts 50 and 52 (e.g., assessing maintenance effectiveness, environmental qualification of electrical equipment).
Subpart O: Construction and Manufacturing Requirements Provides requirements regarding construction and manufacturing activities; requirements are consistent with Framework A Subpart E except for internal refer ences.
 
Subpart P: Requirements for Operation Provides requirements regarding plant operations, including pla nt personnel, maintenance, and programs. The structure of Subpart P parallels Framework A Subp art F in with some exceptions. These exceptions include certain programmatic requi rements derived from the traditional licensing frameworks in Parts 50 and 52 (e.g., asse ssing maintenance effectiveness, environmental qualification of electrical equipment).
 
Subpart Q: Decommissioning Requirements Provides decommissioning requirements that are consistent with Framework A Subpart G, except for internal references.
Subpart Q: Decommissioning Requirements Provides decommissioning requirements that are consistent with Framework A Subpart G, except for internal references.
Subpart R: Licenses, Certifications, and Approvals Provides design and licensing requirements for the various application types (early site permit, standard design approval, design certification, manufacturing license, construction permit, operating license, and combined license). Subpart R is analogous to Framework A Subpart H, but includes many of the technical requirements foundational and unique to Framework B (e.g.,
 
accident analyses, risk evaluations). For additional information see the Technical Requirements section below.
Subpart R: Licenses, Certifications, and Approvals Provides design and licensing requirements for the various appl ication types (early site permit, standard design approval, design certification, manufacturing l icense, construction permit, operating license, and combined license). Subpart R is analogou s to Framework A Subpart H, but includes many of the technical requirements foundational an d unique to Framework B (e.g.,
Subpart S: Maintaining and Revising Licensing Basis Information Provides requirements for maintaining licensing basis information and is structured identically to Subpart I in Framework A, with some exceptions. Certain requirements have been derived from Parts 50 and 52 (e.g., changes to a facility as described in the final safety analysis report without prior NRC approval) or adapted to account for Framework B-specific features (e.g.,
accident analyses, risk evaluations). For additional informatio n see the Technical Requirements section below.
 
Subpart S: Maintaining and Revising Licensing Basis Information Provides requirements for maintaining licensing basis informati on and is structured identically to Subpart I in Framework A, with some exceptions. Certain require ments have been derived from Parts 50 and 52 (e.g., changes to a facility as described in th e final safety analysis report without prior NRC approval) or adapted to account for Framework B-specific features (e.g.,
maintenance of a risk evaluation to include AERI).
maintenance of a risk evaluation to include AERI).
Subpart T: Reporting and Other Administrative Requirements Provides reporting and administrative requirements that are analogous to Subpart J in Framework A, with some exceptions. Certain provisions were adapted from Part 50 and 52 to account for the framework-specific approaches to structures, systems, and components (SSCs) classification (e.g., immediate notification requirements from § 50.72 and licensee event reports from § 50.73).
 
Subpart U: Quality Assurance Criteria Provides quality assurance requirements for the design, manufacture, construction, and operation of certain SSCs. Subpart U is structured similar to Framework A Subpart K, and as Subpart K, the criteria have been sourced from Part 50 Appendix B.
Subpart T: Reporting and Other Administrative Requirements Provides reporting and administrative requirements that are ana logous to Subpart J in Framework A, with some exceptions. Certain provisions were adap ted from Part 50 and 52 to account for the framework-specific approaches to structures, sy stems, and components (SSCs) classification (e.g., immediate notification requirements from § 50.72 and licensee event reports from § 50.73).
Technical Requirements In contrast to the structure of technical content of application requirements in Part 50 and 52, Subpart R features a consolidated listing of technical requirements in § 53.4730 that are later referenced, as appropriate, in application-specific sections. The requirements in § 53.4730 are largely derived from the technical content of application requirements for a combined license (COL) application in § 52.79 because these requirements generally encompass the requirements for other application types. The following example illustrates how the Framework B approach compares to the organization of technical content of application requirements in Parts 50 and 52.
 
Design Certification (DC) and COL applicants under Part 52 are required to provide an analysis and description of the equipment and systems for combustible gas control by § 52.47(a)(12) and § 52.79(a)(8), respectively. The requirements in each of these two paragraphs in Part 52 are identical. Framework B includes a singular, identical, combustible gas control requirement in
Subpart U: Quality Assurance Criteria Provides quality assurance requirements for the design, manufac ture, construction, and operation of certain SSCs. Subpart U is structured similar to Framework A Subpart K, and as Subpart K, the criteria have been sourced from Part 50 Appendix B.
 
Technical Requirements
 
In contrast to the structure of technical content of applicatio n requirements in Part 50 and 52, Subpart R features a consolidated listing of technical requirem ents in § 53.4730 that are later referenced, as appropriate, in application-specific sections. T he requirements in § 53.4730 are largely derived from the technical content of application requi rements for a combined license (COL) application in § 52.79 because these requirements general ly encompass the requirements for other application types. The following example illustrates how the Framework B approach compares to the organization of technical content of application requirements in Parts 50 and 52.
 
Design Certification (DC) and COL applicants under Part 52 are required to provide an analysis and description of the equipment and systems for combustible ga s control by § 52.47(a)(12) and § 52.79(a)(8), respectively. The requirements in each of th ese two paragraphs in Part 52 are identical. Framework B includes a singular, identical, comb ustible gas control requirement in
§ 53.4730(a)(7) that is referenced in the technical content of application requirements for a DC and COL in § 53.4839 and § 53.5016, respectively.
§ 53.4730(a)(7) that is referenced in the technical content of application requirements for a DC and COL in § 53.4839 and § 53.5016, respectively.
A matrix summarizing § 53.4730 technical requirements referenced by each application type is provided in Enclosure 2.
A matrix summarizing § 53.4730 technical requirements reference d by each application type is provided in Enclosure 2.
 
Alternate Evaluation for Risk Insights (AERI)
Alternate Evaluation for Risk Insights (AERI)
The NRC staff recognized that the broad spectrum for which applicants may eventually pursue licensing under Framework B could include facilities that would have maximum accidents of very low consequence (e.g., low power microreactors). Considering this potential, the NRC staff has proposed an AERI approach for developing risk insights that would support licensing of these facilities. The AERI approach permits the use of alternate methods for developing risk insights (e.g., qualitative approaches) in lieu of a PRA if an applicant can satisfy the criteria in subparagraph § 53.4730(a)(34)(ii). Applicants and licensees using the AERI approach would still be required to maintain alternate risk evaluations in accordance with the requirements of
The NRC staff recognized that the broad spectrum for which appl icants may eventually pursue licensing under Framework B could include facilities that would have maximum accidents of very low consequence (e.g., low power microreactors). Consideri ng this potential, the NRC staff has proposed an AERI approach for developing risk insights that would support licensing of these facilities. The AERI approach permits the use of alternat e methods for developing risk insights (e.g., qualitative approaches) in lieu of a PRA if an applicant can satisfy the criteria in subparagraph § 53.4730(a)(34)(ii). Applicants and licensees usi ng the AERI approach would still be required to maintain alternate risk evaluations in acc ordance with the requirements of
§ 53.6052, similar to the requirements for maintaining a PRA that are currently applied to licensees under § 50.71(h).
§ 53.6052, similar to the requirements for maintaining a PRA th at are currently applied to licensees under § 50.71(h).
Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                    Source of Draft Requirement(1)(2)
(if applicable)(3)
Subpart N - Scope and Definitions Definition - Anticipated operational    10 CFR Part 50 Appendix A, with modifications Modifications made to acknowledge 53.3010 occurrence                                                                            the use of the term in Framework B Definition - Design bases              10 CFR 50.2, with modifications              Modifications replace functional goals 53.3010 with specific functions Definition - Reactor coolant            10 CFR 50.2, with modifications              Modifications made to clarify that 53.3010  pressure boundary                                                                    definition only applies to water-cooled reactors Definition - Safety-related SSCs        10 CFR 50.2, with modifications              Definition from 50.2 for LWRs does not 53.3010                                                                                        vary, new definition proposed for term as applied to non-LWRs Subpart O - Construction and Manufacturing Requirements Construction and manufacturing -        Part 53 Framework A (copies 53.600)          Not applicable 53.4100 scope and purpose.
Reporting of defects and                Part 53 Framework A (copies 53.605, with      Modifications made to cross-reference 53.4105 noncompliance.                          modifications; derived from 50.55(e))        equivalent Framework B provisions Part 53 Framework A (copies 53.610, with      Modifications made to cross-reference 53.4110  Construction.
modifications; derived from 50.10)            equivalent Framework B provisions Part 53 Framework A (copies 53.4110(a), with  Modifications reference the technical 53.4110(a) Management and control                  modifications)                                requirements in Subpart R in lieu of those in Subparts B and C Part 53 Framework A (copies 53.4110(b), with  Modifications made regarding modifications) and 10 CFR 50.34(a)(11)        provisions for construction involving 53.4110(b) Construction activities multiple reactor unit requirements adapted from 50.34(a)(11)
Part 53 Framework A (copies 53.620, with      Modifications made to reflect the scope modifications)                                of SSCs that must meet quality 53.4120  Manufacturing.
assurance requirements in Framework B
Subpart P - Requirements for Operation Maintenance, repair, and inspection 10 CFR 50.65, with modifications                  Modifications to existing Part 50 53.4210  programs.                                                                            requirements made to ensure technology-inclusiveness and maintain Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                    Source of Draft Requirement(1)(2)
(if applicable)(3) equivalent scope of SSCs considered within the scope of 10 CFR 50.65 10 CFR 50.36, with modifications                Modifications to existing Part 50 requirements made to ensure 53.4213  Technical specifications.
technology-inclusiveness and maintain equivalent scope of SSCs in TSs Vibratory ground motion required      Part 53 Framework A (copies 53.720) and 10 CFR  Not applicable 53.4215 shutdown.                              50.54(ff)
Part 53 Framework A (copies 53.725), with        Adapted to Framework B. In general, a modifications                                    primary difference that spans the requirements of Framework B §§ 53.4220 through 53.4282 is that the General staffing, training, personnel                                                  certified operator provisions of 53.4220  qualifications, and human factors                                                      Framework A are reserved. Beyond requirements.                                                                          that, another key source of significant differences in comparison with Framework A stems from Framework B not including the provisions of Part 53 subparts B & C.
Part 53 Framework A (copies 53.726), with        Modifications made to cross-reference 53.4222  Communications modifications                                    equivalent Framework B provisions Part 53 Framework A (copies 53.727), with        Modifications made to cross-reference 53.4224  Information Collection Requirements modifications                                    equivalent Framework B provisions Defining, fulfilling, and maintaining  Part 53 Framework A (copies 53.730), with        Omits certified operator provisions 53.4226  the role of personnel in ensuring      modifications safe operations.
Part 53 Framework A (copies 53.735), with        Omits certified operator provisions and 53.4228  General exemptions.
modifications                                    ensures appropriate cross referencing Conditions for operations staffing for Part 53 Framework A (copies 53.740), with        Omits certified operator staffing 53.4230  operating or combined licenses        modifications                                    screening criteria and related certified under this part.                                                                        operator provisions Part 53 Framework A (copies 53.745), with        Omits certified operator provisions.
53.4232  Medical requirements.
modifications 53.4234  Violations.                            Part 53 Framework A (direct reference to 53.750) Not applicable Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)            Section Title/Topic                  Source of Draft Requirement(1)(2)
(if applicable)(3)
Part 53 Framework A (copies 53.755), with        Modifications made to cross-reference 53.4236      Criminal penalties.
modifications                                    equivalent Framework B provisions Part 53 Framework A (copies 53.760), with        Adapted to Framework B 53.4240      Operator licensing.
modifications 53.4242      License requirements.                Part 53 Framework A (direct reference to 53.765)  Not applicable Completeness and accuracy of          Part 53 Framework A (direct reference to 53.770)  Not applicable 53.4244 information.
Incapacitation because of disability  Part 53 Framework A (direct reference to 53.775)  Not applicable 53.4246 or illness.
53.4248      Applications for licensed operators. Part 53 Framework A (direct reference to 53.780)  Not applicable Training program.                    Part 53 Framework A (reference to 53.785), with  References to change control 53.4250                                            modifications                                    provisions are adapted to the relevant section of Framework B Conditions of licensed operator and  Part 53 Framework A (direct reference to 53.790)  Not applicable 53.4252 senior licensed operator licenses.
53.4254      Expiration and Renewal                Part 53 Framework A (direct reference to 53.792)  Not applicable Issuance, modification, and          Part 53 Framework A (direct reference to 53.795)  Not applicable 53.4256 revocation of licenses.
53.4260 - 53.4279 Reserved.                            Not applicable                                    Not applicable Training and qualification of        Part 53 Framework A (copies 53.835), with        Adapted to Framework B 53.4280 commercial nuclear plant personnel. modifications Training and qualification            Part 53 Framework A (direct reference to 53.840)  Not applicable 53.4282 requirements.
Programs.                            Part 53 Framework A (copies 53.840), with        Modifications made to align prefatory 53.4300                                            modifications                                    text with fundamental safety objectives in Framework B 53.4310      Radiation protection.                                                        See below Radiation protection.                Part 53 Framework A (copies 53.850(a)), with      Modifications made to cross-reference modifications                                    equivalent Framework B provisions 53.4310(a) and ensure compliance with entirety of 10 CFR Part 20.
Part 53 Framework A (copies 53.850(b)), with      Modifications made to cross-reference 53.4310(b)    Radiation protection.
modifications, and 10 CFR 50.36a                  equivalent Framework B provisions Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                  Source of Draft Requirement(1)(2)
(if applicable)(3)
Radiation protection.                New requirement developed for consistency with    Establishes specific requirements for existing Standard Technical Specifications and 10  process control program through 53.4310(c)
CFR 50.36a requirements                            compliance with radioactive waste control provisions 53.4320  Emergency preparedness.              Part 53 Framework A (direct reference to 53.855)  Not applicable.
Security programs.                  Part 53 Framework A (copies 53.860), with          Modifications made to cross-reference 53.4330 modifications                                      equivalent Framework B provisions Quality assurance.                  Part 53 Framework A (copies 53.865), with          Modifications made to cross-reference 53.4340 modifications                                      equivalent Framework B provisions Fire protection.                    10 CFR 50.48, 10 CFR Part 50 Appendix R with      Technology-inclusive fire protection modifications, NFPA-805                            requirements that require applicant to define safe and stable state for their design and determine the safe 53.4350 shutdown functions to achieve and maintain safe and stable state; performance-based alternative provided in 53.4350(c)
Inservice inspection/inservice 53.4360                                                                                See below testing.
Inservice inspection/inservice      Reference to 10 CFR 50.55a (ISI and IST            Not applicable 53.4360(a) testing for LWRs                    provisions only)
Inservice inspection/inservice      Part 53 Framework A (direct reference to 53.880)  Not applicable 53.4360(b) testing for NLWRs Environmental qualification of      10 CFR 50.49, with modifications                  Modifications made to Part 50 53.4380  electric equipment important to                                                        requirements to ensure technology-safety for nuclear power plants.                                                        inclusiveness Procedures and guidelines.          Part 53 Framework A (copies portions of 53.910),  Modifications made to address with modifications                                variances in design basis events and 53.4390 SSC classifications between frameworks Integrity assessment program        Part 53 Framework A (53.870), with modifications  Modifications made to accommodate SSC classification scheme used in 53.4400 Framework B; scope of SSCs derived from 10 CFR 53.4210 Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                    Source of Draft Requirement(1)(2)
(if applicable)(3)
Primary containment leakage rate        10 CFR 50.54(o), with modifications        Modifications made to cross-reference 53.4410 testing program.                                                                    equivalent Framework B provisions Subpart Q - Decommissioning Part 53 Framework A (copies 53.1000), with  Modifications made to cross-reference 53.4600  Scope and Purpose.
modifications                              equivalent Framework B provisions Financial assurance for                  Part 53 Framework A (copies 53.1010), with  Modifications made to cross-reference 53.4610 decommissioning.                        modifications                              equivalent Framework B provisions Cost estimates for required              Part 53 Framework A (copies 53.1020), with  Modifications made to cross-reference 53.4620 decommissioning funds.                  modifications                              equivalent Framework B provisions Part 53 Framework A (copies 53.1030), with  Modifications made to cross-reference 53.4630  Annual adjustments.
modifications                              equivalent Framework B provisions Financial instruments for                Part 53 Framework A (copies 53.1040), with  Modifications made to cross-reference 53.4640 decommissioning funds.                  modifications, and 10 CFR 50.75(e)          equivalent Framework B provisions Financial management of                  Part 53 Framework A (copies 53.1045), with  Modifications made to cross-reference 53.4645 decommissioning funds.                  modifications                              equivalent Framework B provisions Part 53 Framework A (copies 53.1050) and 10 Not applicable 53.4650  NRC oversight.
CFR 50.75(e)(2)
Reporting and recordkeeping              Part 53 Framework A (copies 53.1060), with  Modifications made to cross-reference 53.4660 requirements.                            modifications                              equivalent Framework B provisions Part 53 Framework A (copies 53.1070), with  Modifications made to cross-reference 53.4670  Termination of license.
modifications, and 10 CFR 50.82            equivalent Framework B provisions Release of part of a commercial          Part 53 Framework A (copies 53.1080), with  Modifications made to cross-reference 53.4680  nuclear plant or site for unrestricted  modifications, and 10 CFR 50.83            equivalent Framework B provisions use.
Subpart R - Licenses, Certifications, and Approvals Filing of application for licenses,                                                  Modifications made to cross-reference Part 53 Framework A (copies 53.1100), with 53.4700  certifications, or approvals; oath or                                                equivalent Framework B provisions modifications, and 10 CFR 50.30 affirmation.
Part 53 Framework A (copies 53.1101), with  Modifications made to cross-reference 53.4701  Requirement for license.
modifications                              equivalent Framework B provisions Part 53 Framework A (copies 53.1103), with  Modifications made to cross-reference 53.4703  Combining applications.
modifications, and 10 CFR 50.31 and 52.8    equivalent Framework B provisions Part 53 Framework A (copies 53.1106), with  Modifications made to cross-reference 53.4706  Elimination of repetition.
modifications, and 10 CFR 50.32            equivalent Framework B provisions Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)            Section Title/Topic                  Source of Draft Requirement(1)(2)
(if applicable)(3)
Contents of application; general      Part 53 Framework A (copies 53.1109), with        Modifications made to cross-reference 53.4709 information.                          modifications, and 10 CFR 50.33                    equivalent Framework B provisions Part 53 Framework A (copies 53.1112), with        Modifications made to cross-reference 53.4712    Environmental conditions.
modifications, and 10 CFR 50.36(b)                equivalent Framework B provisions Agreement limiting access to          Part 53 Framework A (copies 53.1115), with        Modifications made to cross-reference 53.4715 Classified Information.                modifications, and 10 CFR 50.37                    equivalent Framework B provisions Part 53 Framework A (copies 53.1118), with        Modifications made to cross-reference 53.4718    Ineligibility of certain applicants.
modifications, and 10 CFR 50.38                    equivalent Framework B provisions Exceptions and exemptions from        Part 53 Framework A (copies 53.1120), with        Modifications made to cross-reference 53.4720 licensing requirements                modifications, and 10 CFR 50.11                    equivalent Framework B provisions Part 53 Framework A (copies 53.1121), with        Modifications made to cross-reference 53.4721    Public inspection of applications.
modifications, and 10 CFR 50.39                    equivalent Framework B provisions Part 53 Framework A (copies 53.1124), with        Modifications made to cross-reference 53.4724    Relationship between sections.
modifications                                      equivalent Framework B provisions 53.4725    Standards for review.                                                          See below Common standards.                      10 CFR 50.40, with modifications                  Modifications made to cross-reference 53.4725(a) equivalent Framework B provisions Additional standards for class 104    10 CFR 50.41, with modifications                  Modifications made to limit scope of 53.4725(b)  licenses.                                                                                the review standard to potential Framework B applicants Additional standards for class 103    10 CFR 50.42, with modifications                  Modifications made to cross-reference 53.4725(c) licenses.                                                                                equivalent Framework B provisions Additional standards and provisions    10 CFR 50.43, with modifications                  Modifications made to cross-reference 53.4725(d)  affecting class 103 licenses and                                                          equivalent Framework B provisions certifications for commercial power.
53.4730    General technical requirements.                                                See below Site safety analysis.                  10 CFR 52.79(a)(1), with modifications            Modifications made to support 53.4730(a)(1) technology-inclusive rule text Facility description.                  10 CFR 52.79(a)(2), with modifications            Modifications made to support 53.4730(a)(2) technology-inclusive rule text Kinds and quantities of radioactive    10 CFR 52.79(a)(3), with modifications, 10 CFR    Modifications made to reflect 53.4730(a)(3) materials.                            50.34a, and 10 CFR 20.1101(b)                      requirements in 10 CFR Subpart B for ALARA Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)                Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3)
Design bases and principal design    10 CFR 52.79(a)(4), with modifications              Modifications made to support 53.4730(a)(4) criteria                                                                                technology-inclusive rule text Initiating event and accident 53.4730(a)(5)                                                                                    See below analysis 53.4730(a)(5)(i)  Initiating event and accident        10 CFR 52.79(a)(5), with modifications              Modifications made to support analysis - Requirement for analysis                                                      technology-inclusive rule text and and evaluation                                                                          accommodate new event classifications below 53.4730(a)(5)(ii)  Initiating event and accident        New technology-inclusive requirements for DBA      Modifications made to support analysis - DBA                      analyses and SSC classification; 10 CFR 50.46      technology-inclusive rule text, define acceptance criteria consistent with current rules and create new 50.46-like requirement; includes addition of bounding option 53.4730(a)(5)(iii) Initiating event and accident        New requirement for AOOs that is consistent with    Requirement is new but is based on analysis - AOO                      current requirements to remain below Part 20        other existing requirements (and acceptance criteria and prevent event escalation    includes a pointer to Part 20) and guidance for AOOs 53.4730(a)(5)(iv)  Initiating event and accident        New requirements for assessments and analyses      Provides technology-inclusive analysis - BDBEs                    for credible BDBEs in (A), requirement to provide  requirements for important BDBEs and design features or programmatic controls to        analysis requirements for other mitigate these events in (B) (attempt to create    BDBEs, similar to international defense technology-inclusive class of events such as SBO    in depth requirements and ATWS) 53.4730(a)(5)(v)  Initiating event and accident        10 CFR 52.79(a)(38), with modifications            Modifications made to support analysis - severe accidents                                                              technology-inclusive rule text 53.4730(a)(5)(vi)  Initiating event and accident        Part 53 Framework A (53.440(k)), with              New requirement that was modified analysis - chemical hazards          modifications                                      from Framework A for consistency with Framework B organization and analysis approach 53.4730(a)(6)    Fire protection.                    10 CFR 52.79(a)(6) and (a)(40), with                Modifications reference back to modifications                                      analogous program and design requirements in subpart P Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)                Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3) 53.4730(a)(7)    Combustible gas control.            10 CFR 52.79(a)(8) and 10 CFR 50.44, by              Not applicable extension 53.4730(a)(8)    Environmental qualification of      10 CFR 52.79(a)(10), with modifications, and 10      Modifications reference back to electric equipment important to    CFR 50.49, by extension                              analogous program requirements in safety.                                                                                  subpart P. Split to accommodate the different amounts of information required for the various applications.
53.4730(a)(9)    Role of personnel.                  10 CFR 52.79(a)(14) and 10 CFR 52.79(a)(34)          New requirement that maps back to with restructuring                                  analogous operational requirements in subpart P 53.4730(a)(10)    Maintenance rule.                  10 CFR 52.79(a)(15), with modifications, and 10      Modifications made to reference CFR 50.65, by extension                              analogous program requirements in subpart P 53.4730(a)(11)    Effluent control                    10 CFR 52.79(a)(16), 10 CFR 50.34a, and 10          Modifications made to reference CFR 20.1101(d), with modifications                  analogous program requirements in subpart P and address existing light-water-reactor requirements in 10 CFR Part 50, Appendix I for effluents 53.4730(a)(12)    Post-accident radiation monitoring See below and protection.
53.4730(a)(12)(i)  Post-accident radiation monitoring  10 CFR 50.34(f)(2)(vii)                              Not applicable and protection (TMI action item) 53.4730(a)(12)(ii)  Post-accident radiation monitoring  10 CFR 50.34(f)(2)(viii), with modifications        Modifications made to acknowledge and protection (TMI action item)                                                        that the list referred to in the source reference does not exist in 10 CFR Appendix B nor has one been proposed for inclusion in Subpart U.
53.4730(a)(12)(iii) Post-accident radiation monitoring  10 CFR 50.34(f)(2)(xv)                              Not applicable and protection (TMI action item) 53.4730(a)(13)    Reserved.                          Not applicable 53.4730(a)(14)    Earthquake engineering criteria. 10 CFR 52.79(a)(19), with modifications, and 10      Modifications have been made to CFR Part 50 Appendix S, by extension                ensure technology-inclusiveness when referencing 10 CFR Part 50 Appendix S requirements Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)                Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3) 53.4730(a)(15)    Emergency plans                    10 CFR 52.79(a)(21), with modifications              Modifications made to cross-reference requirements in subpart P, which ultimately map back to Framework A (53.855) 53.4730(a)(16)    State and local government          10 CFR 52.79(a)(22), with modifications              Modifications made to reflect state-of-cooperation in emergency planning.                                                      practice policy initiatives and align with Commissions Tribal Policy Statement (82 FR 2402) and the 2019 issuance of NUREG-0654/FEMA-REP-1, Revision 2, which encourages the involvement of Tribal governments in NRC activities (also see SECY-22-0001) 53.4730(a)(17)    Safety feature testing, analyses,  10 CFR 52.79(a)(24) and 10 CFR 50.43(e), with        Modifications made to cross-reference operating experience, and          modifications                                        equivalent Framework B provisions prototypes.
53.4730(a)(18)    Quality assurance program.                                                    See below 53.4730(a)(18)(i)  Quality assurance program (TMI      10 CFR 50.34(f)(3)(iii), with modifications          Modifications to limit applicability, action item)                                                                            consistent with existing requirements in 10 CFR 50.34(f) which limit applicability based on technical relevance 53.4730(a)(18)(ii)  Quality assurance program (TMI      10 CFR 50.34(f)(3)(ii), with modifications          Modifications to cross-reference action item)                                                                            subpart U instead of 10 CFR Part 50 Appendix B 53.4730(a)(18)(iii) Quality assurance program (COL      10 CFR 52.79(a)(25), with modifications              Modifications made to reference application req.)                                                                        analogous program requirements in subpart U 53.4730(a)(19)    Organizational structure.          10 CFR 52.79(a)(26)                                  Not applicable 53.4730(a)(20)    Managerial and administrative See below controls.
53.4730(a)(20)(i)  Managerial and administrative      10 CFR 52.79(a)(27), with modifications controls.
Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)                Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3) 53.4730(a)(20)(ii) Managerial and administrative        10 CFR 50.34(f)(3)(vii), with modifications    Modifications made to limit applicability controls (TMI action item)                                                          consistent with existing provisions in 10 CFR 50.34(f) 53.4730(a)(21)    Preoperational testing and initial  10 CFR 52.79(a)(28)                            Not applicable startup.
53.4730(a)(22)    Normal operations and                10 CFR 52.79(a)(29)                            Not applicable maintenance.
53.4730(a)(23)    Technical specifications.            10 CFR 52.79(a)(30), with modifications and 10 Modifications made to reference CFR 50.36                                      technical specification requirements in subpart P and differentiate requirements for TSs between application types 53.4730(a)(24)    Fitness-for-duty programs.          10 CFR 52.79(a)(44) and 10 CFR Part 26, by    Not applicable extension 53.4730(a)(25)    Multi-unit sites.                    10 CFR 52.79(a)(31)                            Not applicable 53.4730(a)(26)    Technical qualifications.            10 CFR 52.79(a)(32)                            Not applicable 53.4730(a)(27)    Training program.                    10 CFR 52.79(a)(33), with modifications        Modifications made to reference analogous program requirements in subpart P 53.4730(a)(28)    Physical security program.          10 CFR 52.79(a)(35), with modifications        Modifications made to reference analogous program requirements in subpart P 53.4730(a)(29)    Safeguards, security, and related    10 CFR 52.79(a)(36), with modifications        Modifications made to include an training and qualifications.                                                        additional reference to 10 CFR 73.22 53.4730(a)(30)    Operating experience.                10 CFR 52.79(a)(37), with modifications        Modifications limit applicability of this requirement to accommodate designs with limited operating experience 53.4730(a)(31)    Radiation protection program        10 CFR 52.79(a)(39), with modifications        Modifications made to reference analogous program requirements in subpart P 53.4730(a)(32)    Criticality accident requirements. 10 CFR 52.79(a)(43), with modifications        Modifications made to reference criticality accident and monitoring requirements in part 53 Framework A 53.440(m)
Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)                Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3) 53.4730(a)(33)    Minimization of contamination.      10 CFR 52.79(a)(45) and 10 CFR 20.1406, by        Not applicable extension 53.4730(a)(34)    Risk evaluations.                                                            See below 53.4730(a)(34)(i)  Risk evaluations - PRA              10 CFR 52.79(a)(46), with modifications            Modifications made to accommodate same requirement in Framework B; no technical changes 53.4730(a)(34)(ii)  Risk evaluations - AERI              New alternative to meeting 53.4730(a)(34)(i)      Not applicable 53.4730(a)(35)    Aircraft impact assessment.          10 CFR 50.150(a) and (b), with modifications.      Modifications made to support technology-inclusive rule text 53.4730(a)(36)    Functional containment.                                                      See below 53.4730(a)(36)(i)  Functional containment - NLWR        New alternative developed for NLWRs consistent    Not applicable with policy in SECY-18-0096 53.4730(a)(36)(ii)  Functional containment - LWR        Requirements developed by combining 10 CFR        Modifications to TMI action items made Part 50 Appendix J requirements with relevant      to limit applicability, consistent with TMI action items (10 CFR 50.34(f)(2)(xiv),        current requirements in 10 CFR (f)(2)(xv), and (f)(3)(iv))                        50.34(f), which are limited based on technical relevance 53.4730(a)(37)    Water-cooled reactor requirements.                                            See below 53.4730(a)(37)(i)  Emergency core cooling systems.      10 CFR 52.79(a)(5), with modifications, and 10    Modifications made to abbreviate CFR 50.46 and 10 CFR 50.46a, by extension          language from existing requirement 53.4730(a)(37)(ii)  Codes and standards.                10 CFR 52.79(a)(11) and 10 CFR 50.55a, by          Not applicable extension 53.4730(a)(37)(iii)  Pressurized thermal shock and        10 CFR 52.79(a)(7) and 10 CFR 50.60 and 10        Not applicable fracture toughness requirements. CFR 50.61, by extension 53.4730(a)(37)(iv)  Anticipated transients without      10 CFR 52.79(a)(42) and 10 CFR 50.62, by          Not applicable scram.                              extension 53.4730(a)(37)(v)  Station blackout.                    10 CFR 52.79(a)(9) and 10 CFR 50.63, by            Not applicable extension 53.4730(a)(37)(vi)  Reactor vessel material              10 CFR 52.79(a)(13) and 10 CFR Part 50            Not applicable surveillance.                        Appendix H, by extension 53.4730(a)(37)(vii)  Containment leakage testing.        10 CFR 52.79(a)(12) and 10 CFR Part 50            Not applicable Appendix J, by extension 53.4730(a)(37)(viii) Standard review plan evaluation. 10 CFR 52.79(a)(41)                                Not applicable Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)                Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3) 53.4730(a)(37)(ix)  Resolution of generic issues.        10 CFR 52.79(a)(20), with modifications          Modifications to adopt corrections proposed in ongoing policy initiatives that recognize new classification scheme in NUREG-0933 53.4730(a)(37)(x)  LWR-specific Three Mile Island See below requirements.
53.4730(a)(37)(x)(A) LWR-specific Three Mile Island        10 CFR 50.34(f)(2)(xiii)                          Not applicable requirements.
53.4730(a)(37)(x)(B) LWR-specific Three Mile Island        10 CFR 50.34(f)(2)(xx)                            Not applicable requirements.
53.4730(a)(37)(x)(C) LWR-specific Three Mile Island        10 CFR 50.34(f)(2)(x)                            Not applicable requirements.
10 CFR 50.69, with modifications                  Modifications made to ensure Risk-informed classification of                                                        technology-inclusiveness and 53.4731 structures, systems, and                                                                reference equivalent provisions from components                                                                              Framework B Part 53 Framework A (copies 53.1130), with        Modifications made to cross-reference 53.4740        Limited work authorizations.
modifications, and 10 CFR 50.10                  equivalent Framework B provisions Part 53 Framework A (copies 53.1140), with        Modifications made to cross-reference 53.4750        Early site permits.
modifications, and 10 CFR 52.12                  equivalent Framework B provisions Part 53 Framework A (copies 53.1143), with        Modifications made to cross-reference 53.4753        Filing of applications.
modifications, and 10 CFR 52.15                  equivalent Framework B provisions Contents of applications for early    Part 53 Framework A (copies 53.1144), with        Modifications made to cross-reference 53.4754 site permits; general information. modifications                                    equivalent Framework B provisions 53.4756        Contents of applications for early    10 CFR 52.17, with modifications                  Modifications made to adopt equivalent site permits; technical information.                                                    technical requirements in section 53.4730 and, where section 53.4730 was not leveraged, update references to equivalent provisions in Framework B
Part 53 Framework A (copies 53.1149), with        Modifications made to cross-reference 53.4759 Review of applications.              modifications, and 10 CFR 52.18 and 52.21        equivalent Framework B provisions Referral to the Advisory Committee    Part 53 Framework A (copies 53.1155), with        Modifications made to cross-reference 53.4765 on Reactor Safeguards (ACRS).        modifications, and 10 CFR 52.23                  equivalent Framework B provisions Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3)
Part 53 Framework A (copies 53.1158), with Modifications made to cross-reference 53.4768  Issuance of early site permit.
modifications, and 10 CFR 52.24            equivalent Framework B provisions Part 53 Framework A (copies 53.1161), with Modifications made to cross-reference 53.4771  Extent of activities permitted.
modifications, and 10 CFR 52.25            equivalent Framework B provisions Part 53 Framework A (copies 53.1164), with Modifications made to cross-reference 53.4774  Duration of permit.
modifications, and 10 CFR 52.26            equivalent Framework B provisions Limited work authorization after      Part 53 Framework A (copies 53.1167), with Modifications made to cross-reference 53.4777 issuance of early site permit.        modifications, and 10 CFR 52.27            equivalent Framework B provisions Part 53 Framework A (copies 53.1170), with Modifications made to cross-reference 53.4780  Transfer of early site permit.
modifications, and 10 CFR 52.28            equivalent Framework B provisions Part 53 Framework A (copies 53.1173), with Modifications made to cross-reference 53.4783  Application for renewal.
modifications, and 10 CFR 52.29            equivalent Framework B provisions Part 53 Framework A (copies 53.1176), with Modifications made to cross-reference 53.4786  Criteria for renewal.
modifications, and 10 CFR 52.31            equivalent Framework B provisions Part 53 Framework A (copies 53.1179), with Modifications made to cross-reference 53.4789  Duration of renewal.
modifications, and 10 CFR 52.33            equivalent Framework B provisions Part 53 Framework A (copies 53.1182), with Modifications made to cross-reference 53.4792  Use of site for other purposes.
modifications, and 10 CFR 52.35            equivalent Framework B provisions Reporting of defects and              Part 53 Framework A (copies 53.1185), with Modifications made to cross-reference noncompliance; revocation,            modifications, and 10 CFR 52.37            equivalent Framework B provisions 53.4795 suspension, modification of permits for cause.
Finality of early site permit        Part 53 Framework A (copies 53.1188), with Modifications made to cross-reference 53.4798 determinations.                      modifications, and 10 CFR 52.39            equivalent Framework B provisions Part 53 Framework A (copies 53.1200), with Modifications made to cross-reference 53.4800  Standard design approvals.
modifications, and 10 CFR 52.131          equivalent Framework B provisions Part 53 Framework A (copies 53.1203), with Modifications made to cross-reference 53.4803  Filing of applications.
modifications, and 10 CFR 52.135          equivalent Framework B provisions Contents of applications for          Part 53 Framework A (copies 53.1206), with Modifications made to cross-reference 53.4806  standard design approvals; general    modifications, and 10 CFR 52.136          equivalent Framework B provisions information.
53.4809  Contents of applications for          10 CFR 52.137, with modifications          Modifications made to adopt equivalent standard design approvals;                                                      technical requirements in section technical information.                                                          53.4730 and, where section 53.4730 Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3) was not leveraged, update references to equivalent provisions in Framework B
Part 53 Framework A (copies 53.1212), with  Modifications made to cross-reference 53.4812  Review of applications.
modifications, and 10 CFR 52.139            equivalent Framework B provisions Referral to the Advisory Committee    Part 53 Framework A (copies 53.1215), with  Modifications made to cross-reference 53.4815 on Reactor Safeguards (ACRS).        modifications, and 10 CFR 52.141            equivalent Framework B provisions Part 53 Framework A (copies 53.1218), with  Modifications made to cross-reference 53.4818  Staff approval of design.
modifications, and 10 CFR 52.143 and 52.147 equivalent Framework B provisions Finality of standard design          Part 53 Framework A (copies 53.1221), with  Modifications made to cross-reference 53.4821 approvals; information requests.      modifications, and 10 CFR 52.145            equivalent Framework B provisions Part 53 Framework A (copies 53.1230), with  Modifications made to cross-reference 53.4830  Standard design certifications.
modifications, and 10 CFR 52.41            equivalent Framework B provisions Part 53 Framework A (copies 53.1233), with  Modifications made to cross-reference 53.4833  Filing of applications.
modifications, and 10 CFR 52.45            equivalent Framework B provisions Contents of applications for          Part 53 Framework A (copies 53.1236), with  Modifications made to cross-reference 53.4836  standard design certifications;      modifications, and 10 CFR 52.46            equivalent Framework B provisions general information.
53.4839                                        10 CFR 52.47, with modifications            Modifications made to adopt equivalent technical requirements in section Contents of applications for 53.4730 and, where section 53.4730 standard design certifications; was not leveraged, update references technical information.
to equivalent provisions in Framework B
Contents of applications for          Part 53 Framework A (copies 53.1241), with  Modifications made to cross-reference 53.4841  standard design certifications; other modifications                              equivalent Framework B provisions application content.
Part 53 Framework A (copies 53.1242), with  Modifications made to cross-reference 53.4842  Review of applications.
modifications, and 10 CFR 52.48 and 52.51  equivalent Framework B provisions Referral to the Advisory Committee    Part 53 Framework A (copies 53.1245), with  Modifications made to cross-reference 53.4845 on Reactor Safeguards (ACRS).        modifications, and 10 CFR 52.53            equivalent Framework B provisions Issuance of standard design          Part 53 Framework A (copies 53.1248), with  Modifications made to cross-reference 53.4848 certification.                        modifications, and 10 CFR 52.54            equivalent Framework B provisions Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3)
Part 53 Framework A (copies 53.1251), with Modifications made to cross-reference 53.4851  Duration of certification.
modifications, and 10 CFR 52.55            equivalent Framework B provisions Part 53 Framework A (copies 53.1254), with Modifications made to cross-reference 53.4854  Application for renewal.
modifications, and 10 CFR 52.57            equivalent Framework B provisions Part 53 Framework A (copies 53.1257), with Modifications made to cross-reference 53.4857  Criteria for renewal.
modifications, and 10 CFR 52.59            equivalent Framework B provisions Part 53 Framework A (copies 53.1260), with Modifications made to cross-reference 53.4860  Duration of renewal.
modifications, and 10 CFR 52.61            equivalent Framework B provisions Finality of standard design          Part 53 Framework A (copies 53.1263), with Modifications made to cross-reference 53.4863 certifications.                      modifications, and 10 CFR 52.63            equivalent Framework B provisions Part 53 Framework A (copies 53.1270), with Modifications made to cross-reference 53.4870  Manufacturing licenses.
modifications, and 10 CFR 52.151          equivalent Framework B provisions Part 53 Framework A (copies 53.1273), with Modifications made to cross-reference 53.4873  Filing of applications.
modifications, and 10 CFR 52.155          equivalent Framework B provisions Contents of applications for          Part 53 Framework A (copies 53.1276), with Modifications made to cross-reference 53.4876  manufacturing licenses; general      modifications                              equivalent Framework B provisions information.
53.4879  Contents of applications for          10 CFR 52.157, with modifications          Modifications made to adopt equivalent manufacturing licenses; technical                                                technical requirements in section information.                                                                    53.4730 and, where section 53.4730 was not leveraged, update references to equivalent provisions in Framework B
Contents of applications for          Part 53 Framework A (copies 53.1282), with Modifications made to cross-reference 53.4882  manufacturing licenses; other        modifications, and 10 CFR 52.158          equivalent Framework B provisions application content.
Part 53 Framework A (copies 53.1285), with Modifications made to cross-reference 53.4885  Review of applications.
modifications, and 10 CFR 52.159          equivalent Framework B provisions Part 53 Framework A (copies 53.1286), with Modifications made to cross-reference 53.4886  Referral to ACRS.
modifications, and 10 CFR 52.165          equivalent Framework B provisions Issuance of a manufacturing          Part 53 Framework A (copies 53.1287), with Modifications made to cross-reference 53.4887 license.                              modifications, and 10 CFR 52.167          equivalent Framework B provisions Finality of manufacturing licenses;  Part 53 Framework A (copies 53.1288), with Modifications made to cross-reference 53.4888 information requests.                modifications, and 10 CFR 52.171          equivalent Framework B provisions Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3)
Part 53 Framework A (copies 53.1291), with      Modifications made to cross-reference 53.4891  Duration of manufacturing licenses.
modifications, and 10 CFR 52.173                equivalent Framework B provisions Part 53 Framework A (copies 53.1293), with      Modifications made to cross-reference 53.4893  Transfer of manufacturing licenses.
modifications, and 10 CFR 52.175                equivalent Framework B provisions Part 53 Framework A (copies 53.1295), with      Modifications made to cross-reference 53.4895  Renewal of manufacturing licenses.
modifications, and 10 CFR 52.177 and 52.179      equivalent Framework B provisions Part 53 Framework A (copies 53.1300), with      Modifications made to cross-reference 53.4900  Construction permits.
modifications                                    equivalent Framework B provisions Contents of applications for        Part 53 Framework A (copies 53.1306), with      Modifications made to cross-reference 53.4906  construction permits; general        modifications, and 10 CFR 50.33                  equivalent Framework B provisions information.
53.4909  Contents of applications for        10 CFR 50.34(a), with modifications              Modifications made to adopt equivalent construction permits; technical                                                      technical requirements in section information.                                                                          53.4730 and, where section 53.4730 was not leveraged, update references to equivalent provisions in Framework B
Contents of applications for        Part 53 Framework A (copies 53.1312), with      Modifications made to cross-reference 53.4912  construction permits; other          modifications                                    equivalent Framework B provisions application content.
Part 53 Framework A (copies 53.1315), with      Modifications made to cross-reference 53.4915  Review of applications.              modifications, and 10 CFR 52.81, 50.58, and      equivalent Framework B provisions 52.85 Finality of referenced NRC          Part 53 Framework A (copies 53.1318), with      Modifications made to cross-reference 53.4918  approvals, licenses and              modifications                                    equivalent Framework B provisions certifications.
Referral to the Advisory Committee  Part 53 Framework A (copies 53.1324), with      Modifications made to cross-reference 53.4924 on Reactor Safeguards (ACRS).        modifications, and 10 CFR 50.58 and 52.87        equivalent Framework B provisions Authorization to conduct limited    Part 53 Framework A (copies 53.1327), with      Modifications made to cross-reference 53.4927 work authorization activities.      modifications, and 10 CFR 50.10(g)              equivalent Framework B provisions Exemptions, departures, and          Part 53 Framework A (copies 53.1330), with      Modifications made to cross-reference 53.4930 variances.                          modifications, and 10 CFR 50.11, 52.93, 52.39(d) equivalent Framework B provisions Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                  Source of Draft Requirement(1)(2)
(if applicable)(3)
Part 53 Framework A (copies 53.1333), with      Modifications made to cross-reference 53.4933  Issuance of construction permits. modifications, and 10 CFR 30.35, 50.36(b),      equivalent Framework B provisions 52.97(c), and 50.35(b)
Part 53 Framework A (copies 53.1336), with      Modifications made to cross-reference 53.4936  Finality of construction permits.
modifications, and 10 CFR 50.35(b) and (c)      equivalent Framework B provisions Part 53 Framework A (copies 53.1339), with      Modifications made to cross-reference 53.4939  Construction activities.
modifications, and 10 CFR 53.610                equivalent Framework B provisions Part 53 Framework A (copies 53.1342), with      Modifications made to cross-reference 53.4942  Duration of construction permit.
modifications, and 10 CFR 50.55(a) and (b)      equivalent Framework B provisions Part 53 Framework A (copies 53.1345), with      Modifications made to cross-reference 53.4945  Transfer of construction permits.
modifications, and 10 CFR 50.80                equivalent Framework B provisions Part 53 Framework A (copies 53.1348), with      Modifications made to cross-reference 53.4948  Termination of construction permits.
modifications                                  equivalent Framework B provisions Part 53 Framework A (copies 53.1360), with      Modifications made to cross-reference 53.4960  Operating licenses.
modifications                                  equivalent Framework B provisions Contents of applications for          Part 53 Framework A (copies 53.1366), with      Modifications made to cross-reference 53.4966  operating licenses; general          modifications                                  equivalent Framework B provisions information.
53.4969                                        10 CFR 50.34(b) with modifications              Modifications made to adopt equivalent technical requirements in section Contents of applications for 53.4730 and, where section 53.4730 operating licenses; technical was not leveraged, update references information.
to equivalent provisions in Framework B
Contents of applications for          Part 53 Framework A (copies 53.1372), with      Modifications made to cross-reference 53.4972  operating licenses; other application modifications, and 10 CFR 51.50, 53.710(a), and equivalent Framework B provisions content.                              53.710(b)
Part 53 Framework A (copies 53.1375), with      Modifications made to cross-reference 53.4975  Review of applications.              modifications, and 10 CFR 52.81, 50.34, and    equivalent Framework B provisions 52.85 Referral to the Advisory Committee    Part 53 Framework A (copies 53.1381), with      Modifications made to cross-reference 53.4981 on Reactor Safeguards (ACRS).        modifications, and 10 CFR 50.58 and 52.87      equivalent Framework B provisions Exemptions, departures, and          Part 53 Framework A (copies 53.1384), with      Modifications made to cross-reference 53.4984 variances.                            modifications, and 10 CFR 52.93 and 52.39(d)    equivalent Framework B provisions Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3)
Part 53 Framework A (copies 53.1387), with Modifications made to cross-reference 53.4987  Issuance of operating licenses.
modifications                              equivalent Framework B provisions Part 53 Framework A (copies 53.1390), with Modifications made to cross-reference 53.4990  Finality of operating licenses.
modifications, and 10 CFR 52.98(a)        equivalent Framework B provisions Part 53 Framework A (copies 53.1396), with Modifications made to cross-reference 53.4996  Duration of operating license.
modifications, and 10 CFR 50.51            equivalent Framework B provisions Part 53 Framework A (copies 53.1399), with Modifications made to cross-reference 53.4999  Transfer of an operating license.
modifications, and 10 CFR 52.105          equivalent Framework B provisions Part 53 Framework A (copies 53.1402), with Modifications made to cross-reference 53.5002  Application for renewal.
modifications, and 10 CFR 52.107          equivalent Framework B provisions Continuation of an operating        Part 53 Framework A (copies 53.1405), with Modifications made to cross-reference 53.5005 license.                            modifications, and 10 CFR 50.51            equivalent Framework B provisions Part 53 Framework A (copies 53.1410), with Modifications made to cross-reference 53.5010  Combined licenses.
modifications                              equivalent Framework B provisions Contents of applications for        Part 53 Framework A (copies 53.1413), with Modifications made to cross-reference 53.5013  combined licenses; general          modifications, and 10 CFR 52.77            equivalent Framework B provisions information.
53.5016  Contents of applications for        10 CFR 52.79, with modifications          Modifications made to adopt equivalent combined licenses; technical                                                    technical requirements in section information.                                                                    53.4730 and, where section 53.4730 was not leveraged, update references to equivalent provisions in Framework B
Contents of applications for        Part 53 Framework A (copies 53.1419), with Modifications made to cross-reference 53.5019  combined licenses; other application modifications, and 10 CFR 52.80            equivalent Framework B provisions content.
Part 53 Framework A (copies 53.1422), with Modifications made to cross-reference 53.5022  Review of applications.
modifications                              equivalent Framework B provisions Finality of referenced NRC          Part 53 Framework A (copies 53.1425), with Modifications made to cross-reference 53.5025 approvals.                          modifications                              equivalent Framework B provisions Referral to the Advisory Committee  Part 53 Framework A (copies 53.1431), with Modifications made to cross-reference 53.5031 on Reactor Safeguards.              modifications, and 10 CFR 52.87            equivalent Framework B provisions Authorization to conduct limited    Part 53 Framework A (copies 53.1434), with Modifications made to cross-reference 53.5034 work authorization activities.      modifications, and 10 CFR 52.91            equivalent Framework B provisions Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                    Source of Draft Requirement(1)(2)
(if applicable)(3)
Part 53 Framework A (copies 53.1437), with      Modifications made to cross-reference 53.5037  Exemptions and variances.
modifications, and 10 CFR 52.93                  equivalent Framework B provisions Part 53 Framework A (copies 53.1440), with      Modifications made to cross-reference 53.5040  Issuance of combined licenses.
modifications, and 10 CFR 52.97                  equivalent Framework B provisions Part 53 Framework A (copies 53.1443), with      Modifications made to cross-reference 53.5043  Finality of combined licenses.
modifications, and 10 CFR 52.98                  equivalent Framework B provisions Part 53 Framework A (copies 53.1446), with      Modifications made to cross-reference 53.5046  Construction activities.
modifications                                    equivalent Framework B provisions Part 53 Framework A (copies 53.1449), with      Modifications made to cross-reference 53.5049  Inspection during construction.
modifications                                    equivalent Framework B provisions Operation under a combined              Part 53 Framework A (copies 53.1452), with      Modifications made to cross-reference 53.5052 license.                                modifications, and 10 CFR 52.103                equivalent Framework B provisions Part 53 Framework A (copies 53.1455), with      Modifications made to cross-reference 53.5055  Duration of combined license.
modifications, and 10 CFR 52.104                equivalent Framework B provisions Part 53 Framework A (copies 53.1456), with      Modifications made to cross-reference 53.5056  Transfer of a combined license.
modifications, and 10 CFR 52.105                equivalent Framework B provisions Part 53 Framework A (copies 53.1458), with      Modifications made to cross-reference 53.5058  Application for renewal.
modifications, and 10 CFR 52.107                equivalent Framework B provisions Part 53 Framework A (copies 53.1461), with      Modifications made to cross-reference 53.5061  Continuation of combined license.
modifications, and 10 CFR 52.109                equivalent Framework B provisions Standardization of nuclear power        Part 53 Framework A (copies 53.1470), with      Modifications made to cross-reference plant designs: licenses to construct    modifications, and Appendix N of Parts 50 and 52 equivalent Framework B provisions 53.5070 and operate nuclear power reactors of identical design at multiple sites.
Subpart S - License Maintenance Part 53 Framework A (copies 53.1500), with      Modifications made to clarify 53.6000  Licensing basis information.
modifications                                    applicability under Framework B Specific terms and conditions of        Part 53 Framework A (copies 53.1502), with      Modifications made to clarify 53.6002 licenses                                modifications                                    applicability under Framework B Changes to licensing basis              Part 53 Framework A (copies 53.1505), with      Modifications made to cross-reference 53.6005  information requiring prior NRC          modifications                                    equivalent Framework B provisions approval.
Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3)
Part 53 Framework A (copies 53.1510), with          Modifications made to reconcile modifications, 10 CFR 50.90 and 10 CFR              differences between analysis 50.91(a)(1)                                          requirements in Frameworks A and B Application for amendment of 53.6010                                                                                            to support a license amendment license.
(Framework B aligned more closely with existing 10 CFR Part 50 provisions)
Part 53 Framework A (copies 53.1515), with          Modifications made to cross-reference 53.6015  Public notices; state consultation.
modifications, and 10 CFR 50.91                      equivalent Framework B provisions Part 53 Framework A (copies 53.1520), with          Modifications made to cross-reference 53.6020  Issuance of amendment.
modifications, and 10 CFR 50.92                      equivalent Framework B provisions Revising certification information  Part 53 Framework A (copies 53.1525), with          Modifications made to cross-reference 53.6025 within a design certification rule. modifications                                        equivalent Framework B provisions Revising design information within a Part 53 Framework A (copies 53.1530), with          Modifications made to cross-reference 53.6030 manufacturing license.              modifications                                        equivalent Framework B provisions Part 53 Framework A (copies 53.1535), with          Modifications made to cross-reference 53.6035  Amendments during construction.
modifications                                        equivalent Framework B provisions Updating licensing basis information 10 CFR 50.59, with modifications                    Modifications include eliminating the and determining the need for NRC                                                          term Final Hazards Summary Report 53.6040  approval                                                                                  (legacy term) and inclusion of cross-references to equivalent Framework B
          .                                                                                        provisions Updating final safety analysis 53.6045                                                                                  See below.
reports.
Updating final safety analysis      Part 53 Framework A (copies 53.1545(a), with        Modifications made to cross-reference 53.6045(a) reports.                            modifications, and 10 CFR 50.71(e)                  equivalent Framework B provisions 53.6045(b) Updating final safety analysis      Part 53 Framework A (copies 53.1545(b)), with        Modifications made to cross-reference reports.                            modifications, and 10 CFR 50.71(e)                  equivalent Framework B provisions 53.6045(c) Updating final safety analysis      10 CFR 50.71(e)(3)(iii), with modifications          Modifications made to cross-reference reports.                                                                                  equivalent Framework B provisions and address when a COL applicant or holder would no longer be required to Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                  Source of Draft Requirement(1)(2)
(if applicable)(3) provide annual updates to the FSAR for new information or reevaluated conditions 53.6045(d) Updating final safety analysis        Part 53 Framework A (copies 53.1545(d)) and 10    Not applicable reports.                              CFR 50.71(e)(6) 53.6045(e) Reserved.
53.6045(f) Updating final safety analysis        10 CFR 50.71(f), with modifications              Modifications made to cross-reference reports.                                                                                equivalent Framework B provisions Evaluating changes to facility as    10 CFR 50.59(c) and 10 CFR 50.59(d), with        Modifications made to cross-reference 53.6050  described in final safety analysis    modifications                                    equivalent Framework B provisions reports.
53.6052  Maintenance of risk evaluations.                                            See below.
10 CFR 50.71(h)(1), with modifications            Modifications made to include the 53.6052(a) Maintenance of risk evaluations.                                                        Alternate Evaluation for Risk Insights (AERI) approach 53.6052(b)                                      10 CFR 50.71(h)(2), with modifications            Modifications made to include PRA Maintenance of risk evaluations.                                                        maintenance and/or upgrade provisions for AERI and PRA 53.6052(c)                                      10 CFR 50.71(h)(3), with modifications            Modifications made to reference Maintenance of risk evaluations.
equivalent Framework B provisions 53.6052(d)                                      New requirement based on 10 CFR 50.71(h)(3),      Modifications made to address the Maintenance of risk evaluations.      with modifications.                              confirmation of the AERI during license renewal 10 CFR 50.150(c), with modifications              Modifications made to cross-reference Control of aircraft impact 53.6054                                                                                          equivalent Part 50 provisions in assessments.
Framework B Control of licensing basis            Part 53 Framework A (copies 53.1555), with        Modifications made to reference 53.6055 information in program descriptions. modifications                                    equivalent Framework B provisions Updating program documents            Part 53 Framework A (copies 53.1560), with        Modifications made to reference 53.6060  included in licensing basis          modifications                                    equivalent Framework B provisions information.
Evaluating changes to programs        Part 53 Framework A (copies 53.1565), with        Modifications made to reference 53.6065  included in licensing basis          modifications                                    equivalent Framework B provisions information.
Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                  Source of Draft Requirement(1)(2)
(if applicable)(3)
Part 53 Framework A (copies 53.1570), with            Modifications made to reference 53.6070  Transfer of licenses or permits.
modifications, and 10 CFR 50.80                      equivalent Framework B provisions Part 53 Framework A (copies 53.1575), with            Modifications made to reference 53.6075  Termination of license.
modifications, and 10 CFR 50.82                      equivalent Framework B provisions Part 53 Framework A (copies 53.1580), with            Modifications made to reference 53.6080  Information requests.
modifications, and 10 CFR 50.54(f)                    equivalent Framework B provisions.
Revocation, suspension,              Part 53 Framework A (copies 53.1585), with            Modifications made to reference 53.6085  modification of licenses, permits,  modifications, and 10 CFR 50.100                      equivalent Framework B provisions.
and approvals for cause.
10 CFR 50.109, with modifications                    Modifications made to reference 53.6090  Backfitting.
equivalent Framework B provisions 53.6095  Renewal.                            Part 53 Framework A (copies 53.1595)                  Not applicable Subpart T - Reporting and Other Administrative Requirements Part 53 Framework A (copies 53.1600), with            Modifications made to cross-reference 53.6300  General information.
modifications                                        equivalent Framework B provisions Part 53 Framework A (copies 53.1610) and 10          Not applicable.
53.6310  Unfettered access for inspections.
CFR 50.70 Maintenance of records, making of 53.6320                                                                                    See below reports.
Maintenance of records, making of    Part 53 Framework A (copies 53.1620(a)) and 10        Not applicable 53.6320(a) reports.                            CFR 50.71(a) 53.6320(b) Reserved Part 53 Framework A (copies 53.1620(c)), with        Modifications made to distinguish Maintenance of records, making of 53.6320(c)                                      modifications, and 10 CFR 50.71(c)                    records and reports generated under reports.
Framework B Part 53 Framework A (copies 53.1620(d)), with        Modifications made to distinguish Maintenance of records, making of 53.6320(d)                                      modifications, and 10 CFR 50.71(d)                    records and reports generated under reports.
Framework B Policy initiative associated with reporting          New requirement ensures licensee Maintenance of records, making of    requirement for fee purposes                          promptly notifies NRC of completion of 53.6320(e) reports.                                                                                  power ascension testing so the NRC can assess part 171 fees Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                  Source of Draft Requirement(1)(2)
(if applicable)(3) 10 CFR 50.72, with modifications                Modifications made to cross-reference equivalent Framework B provisions; Immediate notification requirements reporting requirements aligned to those 53.6330  for operating commercial nuclear in 10 CFR 50.72 due to the similarities plants.
in SSC classification between Part 50 and Framework B 10 CFR 50.73, with modifications                Modifications made to cross-reference equivalent Framework B provisions; reporting requirements aligned to those 53.6340  Licensee event report system.
in 10 CFR 50.73 due to the similarities in SSC classification between Part 50 and Framework B Part 53 Framework A (copies 53.1645), with      Modifications made to cross-reference 53.6345  Periodic reports.
modifications, and 10 CFR 50.36a(a)(2)          equivalent Framework B provisions Part 53 Framework A (copies 53.1650) and 10      Not applicable 53.6350  Facility information and verification.
CFR 50.78 Part 53 Framework A (copies 53.1660), with      Modifications made to cross-reference 53.6360  Financial requirements.
modifications                                    equivalent Framework B provisions Part 53 Framework A (copies 53.1670), with      Modifications made to distinguish 53.6370  Financial qualifications.
modifications and 10 CFR 50.33                  applicants under Framework B Part 53 Framework A (copies 53.1680) and 10      Not applicable 53.6380  Annual financial reports.
CFR 50.71(b)
Licensees change of status; 53.6390                                                                                See below financial qualifications.
Licensees change of status;          Part 53 Framework A (copies 53.1690(a)), with    Modifications made to cross-reference 53.6390(a) financial qualifications.              modifications, and 10 CFR 50.76                  equivalent Framework B provisions Licensees change of status;          Part 53 Framework A (copies 53.1690(b)) and 10  Not applicable 53.6390(b) financial qualifications.              CFR 50.54(cc)
Part 53 Framework A (copies 53.1700), with      Modifications made to cross-reference 53.6400  Creditor regulations.
modifications, and 10 CFR 50.81                  equivalent Framework B provisions Part 53 Framework A (copies 53.1710), with      Modifications made to cross-reference 53.6410  Financial protection.
modifications                                    equivalent Framework B provisions Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)          Section Title/Topic                Source of Draft Requirement(1)(2)
(if applicable)(3)
Insurance required to stabilize and  Part 53 Framework A (copies 53.1720), with    Modifications made to cross-reference 53.6420  decontaminate plant following an    modifications, and 10 CFR 50.54(w)            equivalent Framework B subpart accident.
53.6430  Financial protection requirements. Part 53 Framework A (copies 53.1730)          Not applicable Subpart U - Quality Assurance Part 53 Framework A (copies 53.1800), with    Modifications made to introductory text 53.6600  General Provisions                  modifications                                to align with introductory text in 10 CFR Part 50 Appendix B 53.6605  Organization                        10 CFR Part 50 Appendix B Criterion I        Not applicable 53.6610  Quality Assurance Program            10 CFR Part 50 Appendix B Criterion II        Not applicable 53.6615  Design Control                      10 CFR Part 50 Appendix B Criterion IIII      Not applicable 53.6620  Procurement Document Control        10 CFR Part 50 Appendix B Criterion IV        Not applicable Instructions, Procedures and        10 CFR Part 50 Appendix B Criterion V        Not applicable 53.6625 Drawings 53.6630  Document Control                    10 CFR Part 50 Appendix B Criterion VI        Not applicable 10 CFR Part 50 Appendix B Criterion VII, with Modifications made to adopt Control of Purchased Material, 53.6635                                        modifications                                commercial nuclear plant in lieu of Equipment and Services nuclear power plant.
Identification and Control of        10 CFR Part 50 Appendix B Criterion VIIII    Not applicable 53.6640 Materials, Parts and Components 53.6645  Control of Special Processes        10 CFR Part 50 Appendix B Criterion IX        Not applicable 53.6650  Inspection                          10 CFR Part 50 Appendix B Criterion X        Not applicable 53.6655  Test Control                        10 CFR Part 50 Appendix B Criterion XI        Not applicable Control of Measuring and Test        10 CFR Part 50 Appendix B Criterion XII      Not applicable 53.6660 Equipment 53.6665  Handling, Storage and Shipping      10 CFR Part 50 Appendix B Criterion XIII      Not applicable Inspection, Test and Operating      10 CFR Part 50 Appendix B Criterion XIV      Not applicable 53.6670 Status Nonconforming Materials, Parts or    10 CFR Part 50 Appendix B Criterion XV        Not applicable 53.6675 Components 53.6680  Corrective Action                    10 CFR Part 50 Appendix B Criterion XVI      Not applicable 53.6685  Quality Assurance Records            10 CFR Part 50 Appendix B Criterion XVII      Not applicable 53.6690  Audits                              10 CFR Part 50 Appendix B Criterion XVIII    Not applicable Enclosure 1 - Summary of Framework B Requirements and Source Variance(s) from Source Section(s)                    Section Title/Topic                      Source of Draft Requirement(1)(2)
(if applicable)(3)
Notes:
(1) Several provisions in Part 53 Framework B are based on the preliminary proposed rule text for Part 53 Framework A. However, several of the provisions in Framework A are based on existing requirements in other parts of 10 CFR. Where appropriate, this column includes additional references to the sources of requirements from Framework A to assist in understanding where a given provision was derived, even if the Framework B draft preliminary proposed rule text was sourced from Framework A.
(2) Several provisions in Framework B were derived from 10 CFR Part 50 and 10 CFR Part 52. In some cases, the provisions from these parts include additional references to other requirements (e.g., 10 CFR 52.79(a)(8) references 10 CFR 50.44). To the extent practicable, this table denotes from where a particular provision for Framework B was sourced in addition to the base requirement associated with the source. In these cases, the table denotes that the Framework B references the base requirement by extension.
(3) For variances that state Modifications made to cross-reference equivalent Framework B provisions, this generally refers to a situation where the source requirement was adopted in its entirety, but conforming changes were required to address the organizational scheme in Framework B.
Enclosure 2 - Summary of Part 53 Framework B References to § 53.4730 General Technical Requirements Application Type Part 53 Framework B                                                                                            (Technical Requirements Section in Part 53 Framework B)
Description of Part 53 Framework B Requirement Paragraph No.                                                                                ESP          SDA          DC            ML            CP          OL          COL
(§ 53.4756)  (§ 53.4809)  (§ 53.4839)  (§ 53.4879)    (§ 53.4909) (§ 53.4969) (§ 53.5016) 53.4730(a)(1)        Site safety analysis.                                                                                      See below.
53.4730(a)(1)(i)        Site safety analysis.                                                  X                                                      X          X5          X 53.4730(a)(1)(ii)      Site safety analysis.                                                  X                                                      X                      X 53.4730(a)(1)(iii)      Site safety analysis.                                                  X                                                      X                      X 53.4730(a)(1)(iv)        Site safety analysis.                                                  X                                                      X                      X 53.4730(a)(1)(v)        Site safety analysis.                                                  X                                                      X                      X 53.4730(a)(1)(vi)        Site safety analysis.                                                  X          X            X            X              X                      X 53.4730(a)(2)        Facility description.                                                  X          X            X            X6            X          X          X 53.4730(a)(3)        Kinds and quantities of radioactive materials.                                      X            X            X                          X          X 53.4730(a)(4)        Design bases and principal design criteria                                          X            X            X              X          X          X 53.4730(a)(5)        Initiating event and accident analysis                                                                    See below.
53.4730(a)(5)(i)        Initiating event and accident analysis - Requirement X            X            X              X          X          X for analysis and evaluation 53.4730(a)(5)(ii)      Initiating event and accident analysis - DBA                                        X            X            X              X          X          X 53.4730(a)(5)(iii)      Initiating event and accident analysis - AOO                                        X            X            X              X          X          X 53.4730(a)(5)(iv)        Initiating event and accident analysis - BDBEs                                      X            X            X              X          X          X 53.4730(a)(5)(v)        Initiating event and accident analysis - severe X            X            X              X          X          X accidents 53.4730(a)(5)(vi)        Initiating event and accident analysis - chemical X            X            X              X          X          X hazards.
53.4730(a)(6)        Fire protection.                                                                                                                          X          X 53.4730(a)(7)        Combustible gas control.                                                            X            X            X              X          X          X 53.4730(a)(8)        Environmental qualification of electric equipment See below.
important to safety.
53.4730(a)(8)(i)        Environmental qualification of electric equipment X          X important to safety.
53.4730(a)(8)(ii)      Environmental qualification of electric equipment X            X            X important to safety.
53.4730(a)(9)        Role of personnel.                                                                                                                        X          X 53.4730(a)(10)        Maintenance rule.                                                                                                                          X          X 5
See § 53.4969(a)(1); the full site evaluation should include a description of changes from the CP.
6 See § 53.4879(b) 31
 
Enclosure 2 - Summary of Part 53 Framework B References to § 53.4730 General Technical Requirements Application Type Part 53 Framework B                                                                              (Technical Requirements Section in Part 53 Framework B)
Description of Part 53 Framework B Requirement Paragraph No.                                                                  ESP          SDA          DC            ML            CP          OL          COL
(§ 53.4756)  (§ 53.4809)  (§ 53.4839)  (§ 53.4879)    (§ 53.4909) (§ 53.4969) (§ 53.5016) 53.4730(a)(11)    Effluent control                                                          X            X            X                          X          X 53.4730(a)(12)    Post-accident radiation monitoring and protection.                                              See below.
53.4730(a)(12)(i)  Post-accident radiation monitoring and protection                        X            X            X              X          X          X 53.4730(a)(12)(ii)  Post-accident radiation monitoring and protection                        X            X            X              X          X          X 53.4730(a)(12)(iii) Post-accident radiation monitoring and protection                        X            X            X              X          X          X 53.4730(a)(13)    Reserved.
53.4730(a)(14)    Earthquake engineering criteria.                                          X            X            X              X          X          X 53.4730(a)(15)    Emergency plans.                                                                                                    X          X          X 53.4730(a)(16)    State and local government cooperation in emergency X          X planning.
53.4730(a)(17)    Safety feature testing, analyses, operating experience, X            X            X                          X          X and prototypes.
53.4730(a)(18)    Quality assurance program.                                                                      See below.
53.4730(a)(18)(i)  Quality assurance program                                    X            X            X            X              X          X          X 53.4730(a)(18)(ii)  Quality assurance program                                    X            X            X            X              X          X          X 53.4730(a)(18)(iii) Quality assurance program                                    X            X            X            X              X          X          X 53.4730(a)(19)    Organizational structure.                                                                                                        X          X 53.4730(a)(20)    Managerial and administrative controls.                                                          See below.
53.4730(a)(20)(i)  Managerial and administrative controls                                                                                          X          X 53.4730(a)(20)(ii)  Managerial and administrative controls                                                                                          X          X 53.4730(a)(21)    Preoperational testing and initial startup.                                                                                      X          X 53.4730(a)(22)    Normal operations and maintenance.                                                                                              X          X 53.4730(a)(23)    Technical specifications.                                                                        See below.
53.4730(a)(23)(i)  Technical specifications.                                                                                                        X          X 53.4730(a)(23)(ii)  Technical specifications.                                                              X            X 53.4730(a)(24)    Fitness-for-duty programs.                                                                                                      X          X 53.4730(a)(25)    Multi-unit sites                                                                                                    X          X          X 53.4730(a)(26)    Technical qualifications.                                                X            X            X              X          X          X 53.4730(a)(27)    Training program.                                                                                                                X          X 53.4730(a)(28)    Physical security program.                                                                                                      X          X 53.4730(a)(29)    Safeguards contingency plan.                                                                                                    X          X 53.4730(a)(30)    Operating experience.                                                    X            X            X                                      X 32


Enclosure 2 - Summary of Part 53 Framework B References to § 53.4730 General Technical Requirements Application Type Part 53 Framework B                                                                                    (Technical Requirements Section in Part 53 Framework B)
  }}
Description of Part 53 Framework B Requirement Paragraph No.                                                                        ESP          SDA            DC            ML            CP          OL          COL
(§ 53.4756) (§ 53.4809)    (§ 53.4839)  (§ 53.4879)    (§ 53.4909) (§ 53.4969) (§ 53.5016) 53.4730(a)(31)          Radiation protection program                                                                                                      X          X 53.4730(a)(32)          Criticality accident requirements.                                        X              X            X              X                      X 53.4730(a)(33)          Minimization of contamination.                                            X              X            X                          X          X 53.4730(a)(34)          Risk evaluations.                                                                                See below.
53.4730(a)(34)(i)        Risk evaluations - PRA                                                    X              X            X              X          X          X 53.4730(a)(34)(ii)        Risk evaluations - AERI                                                  X              X            X              X          X          X 53.4730(a)(35)          Aircraft impact assessment.                                              X              X            X              X          X          X 53.4730(a)(36)          Functional containment.                                                                          See below.
53.4730(a)(36)(i)        Functional containment - NLWR                                            X              X            X                          X          X 53.4730(a)(36)(ii)        Functional containment - LWR                                              X              X            X                          X          X 53.4730(a)(37)          Water-cooled reactor requirements.                                                                See below.
53.4730(a)(37)(i)        Emergency core cooling systems.                                          X              X            X              X          X          X 53.4730(a)(37)(ii)        Codes and standards.                                                                                                  X          X          X 53.4730(a)(37)(iii)        Pressurized thermal shock and fracture toughness X              X            X                          X          X requirements.
53.4730(a)(37)(iv)        Anticipated transients without scram.                                    X              X            X                          X          X 53.4730(a)(37)(v)        Station blackout.                                                        X              X            X                          X          X 53.4730(a)(37)(vi)        Reactor vessel material surveillance.                                                                                            X          X 53.4730(a)(37)(vii)        Containment leakage testing.                                                                                                      X          X 53.4730(a)(37)(viii)      Standard review plan evaluation.7                            X            X                            X 53.4730(a)(37)(ix)        Resolution of generic issues.                                            X              X            X                          X          X 53.4730(a)(37)(x)        Requirements from LWR operating experience.                                                      See below.
53.4730(a)(37)(x)(A)        Requirements from LWR operating experience.                              X              X            X              X          X          X 53.4730(a)(37)(x)(B)        Requirements from LWR operating experience.                              X              X            X              X          X          X 53.4730(a)(37)(x)(C)        Requirements from LWR operating experience.                              X              X            X              X          X          X 7
Evaluation of the applicability of this requirement is ongoing.
33}}

Revision as of 20:16, 17 November 2024

Rulemaking: Part 53 Rulemaking - Framework B Development Process and Provisions White Paper with Requirements Crosswalk and Application Tables
ML22160A039
Person / Time
Issue date: 06/10/2022
From: Robert Beall
NRC/NMSS/DREFS/RRPB
To:
Beall, Robert
Shared Package
ML20289A534 List:
References
10 CFR Part 53, NRC-2019-0062, RIN 3150-AK31
Download: ML22160A039 (33)
v • d • e


Text

This overview white paper is being released to support ongoing public discussions concerning the development of preliminary proposed rule language. This whi te paper has not been subject to complete NRC management or legal review, and its contents sh ould not be interpreted as official agency positions. The NRC staff continues to work on the preliminary proposed rule language described in this document and continues to welcome pu blic participation in these the rulemaking activities.

Part 53 Framework B Development Process and Provisions Overview

The Nuclear Regulatory Commission (NRC) staff is developing opt ional regulatory frameworks to support eventual licensing of commercial nuclear plants thro ugh the proposed addition of a new part (Part 53) in Title 10 of the Code of Federal Regulations (10 CFR).1 The existing regulatory frameworks in 10 CFR Part 50 (Part 50) and 10 CFR Pa rt 52 (Part 52) are currently being used for licensing new reactor technologies, but they wer e developed largely to accommodate the design and licensing of large, light-water reac tors (LWRs). Part 53 would provide technology-inclusive regulations using methods of evaluation that are flexible and practicable for application to a variety of advanced reactor te chnologies, such as high-temperature gas and molten salt reactors. This would, in turn, help to reduce the need for non-LWR applicants to apply exemptions from certain existing LWR-sp ecific requirements.

Preliminary proposed Part 53 language includes two distinct lic ensing framework options:

Functional design criteria informed by a PRA are established to ensure that high-level safety and design requirements are satisfied. Framework A lever ages many of the principles developed as part of the licensing modernization pro ject as outlined in Nuclear Energy Institute Report 18-04,2 and NRC Regulatory Guide (RG) 1.233. 3

  • Framework B: Requirements would support a traditional approach to design and licensing where deterministic safety analyses are complemented by risk insights; risk insights may also be used to confirm the results of traditional safety analyses. Principal design criteria are established in the initial stages of design and licensing and subsequent design activities are performed to ensure that these criteria are met.

Framework B also provides for the optional use of an Alternate Evaluation for Risk Insights (AERI) approach if certain criteria are satisfied to d emonstrate that the bounding accident of such a facility would be of very low consequence.

1 This rulemaking was initiated, in part, in response to Congressional direction in the Nuclear Energy Innovation and Modernization Act, Pub. L. No. 115-439, § 103(a)(4), 132 Stat. 5565, 5572 (Jan. 14, 2019)

(codified at 42 U.S.C. § 2133 note).

2 Nuclear Energy Institute Technical Report 18-04, Revision 1. Risk-Informed Performance-Based Technology Inclusive Guidance for Non-Light Water Reactor Licensing Basis Development. August 2019 (ML19241A336).

3 Regulatory Guide (RG) 1.233, Revision 0. Guidance for a Technology-Inclusive, Risk-Informed, and Performance-Based Methodology to Inform the Licensing Basis and Content of Applications for Licenses, Certifications, and Approvals for Non-Light Water Reactors. June 2020 (ML20091L698).

Framework A preliminary proposed rule language development is l argely complete. The second consolidated iteration of preliminary proposed rule language fo r Framework A was issued in May 2022 (Agencywide Documents Access and Management System (AD AMS) Accession No. ML22125A000).

The NRC staff is preparing a consolidated draft proposed rule p ackage with both frameworks to be provided to the Commission in February 2023. In the interim, the NRC staff continues to provide opportunities for stakeholders to provide feedback and comments on preliminary proposed rule language4 and supports additional stakeholder interactions through publi c meetings.

Background

Framework B was developed in response to stakeholder feedback r egarding the need for additional flexibility in the use of PRA in Part 53. Framework B development was also motivated by stakeholder feedback suggesting that some reactor vendors ma y initially pursue international markets where licensing frameworks are informed by internationa l safety standards and guidelines that more closely align with traditional paradigms i n Part 50 and Part 52. Therefore, an internationally licensed design could subsequently be licens ed domestically under a traditional framework, such as Framework B, without the need fo r major changes to the design approach.

Efforts to develop a traditional licensing framework in Part 53 began in mid-to late-2021 with the Part 5X effort which proposed technology-inclusive alternativ es to some of the technical requirements in Parts 50 and 52. The initial iteration of the P art 5X rule text was included within the Part 53 consolidated draft preliminary proposed rule text p ackage issued in February 2022 (ADAMS Accession No. ML22024A066). The Part 5X rule text, inclu ding feedback received on the Part 5X rule text during stakeholder interactions in 2021, was leveraged to develop certain Framework B technical content of application requirements. For example, the accident analysis and initiating event requirements in paragraph § 53.4730(a)(5) of the draft preliminary proposed rule text was informed by the Part 5X effort.

Development Methodology

The NRC staff employed the following approach for developing Fr amework B requirements:

  • Adopt Framework A requirements when the Framework A requiremen ts are independent of the analysis methodology (e.g., decommissioning).

o The NRC staff used direct cross-references to Framework A, whe re possible.

o Where direct cross-references could not be used, Framework A p rovisions were copied to Framework B with updated internal cross-references, t erminology, etc.

  • Assess if existing requirements in Parts 50 and 52 are technol ogy inclusive. If so, adopt them directly by copying the existing requirements into Framewo rk B. In some instances, provisions from Parts 50 and 52 were not copied into Framework B, but were used by

4 For information on how to submit comments go to https://www.regulations.gov and search for Docket ID NRC-2019-0062

drafting conforming changes in the existing requirements and in cluding a reference to these requirements in Framework B.

  • Develop unique, technology-inclusive requirements correspondin g, where appropriate, to existing requirements in Parts 50 and 52. Consider state-of-pra ctice technical and policy initiatives and, as appropriate and consistent with Commission policy, approaches used in international standards.

A table summarizing the results of this development process, in cluding the source of Framework B requirements and reason for deviations from the source, as ap plicable, is provided in. Enclosure 1 reveals that a majority of Framework B preliminary proposed rule language is derived from Framework A or Parts 50 and 52. The NR C staff notes that there are instances where Frameworks A and B are intended to be identical or similar, but may have diverged slightly due to the timing between when the most recen t iteration of each framework was released. These deviations will be reconciled when the fram eworks are merged.

Structure

Like Framework A, Framework B was developed to establish a stan dalone set of requirements covering the entire lifecycle of a commercial nuclear plant. Th erefore, Framework A was used as a starting point for establishing the structure of Framework B. As shown in Table 1, Framework A and B structures are largely parallel.

Table 1: Part 53 Organization

Subpart Title Framework A Framework B Subpart Subpart General Provisions Subpart A (Common)

Technology-Inclusive Safety Requirements Subpart B Note (1)

Design and Analysis Requirements Subpart C Siting Requirements Subpart D Note (2)

Definitions Note (3) Subpart N Construction and Manufacturing Requirements Subpart E Subpart O Requirements for Operation Subpart F Subpart P Decommissioning Requirements Subpart G Subpart Q Licenses, Certifications, and Approvals Subpart H Subpart R Maintaining and Revising Licensing Basis Information Subpart I Subpart S Reporting and Other Administrative Requirements Subpart J Subpa rt T Quality Assurance Criteria Subpart K Subpart U Notes:

(1) Framework B does not include separate subparts for safety and design requirements. These are largely captured by the requirements in Subpart R in a manner similar to how technical requirements are captured for the various application types in Parts 50 and 52 as part of the technical content of application requirements for a given application type.

(2) Framework B does not include a separate subpart for siting requirements. The siting requirements in 10 CFR Part 100 are used instead, consistent with the treatment of siting in Parts 50 and 52.

(3) The most recent iteration of Framework A issued in May 2022 does not include a separate subpart for framework-specific definitions. It is expected that definitions specific to Framework A will be included within an existing Framework A subpart as the preliminary proposed rule language is further refined.

Subpart A: General Provisions Provides a scope and purpose statement, definitions of terms co mmon to Frameworks A and B, and other provisions common to both frameworks (e.g., written c ommunications, employee protection, specific exemptions).

Subpart N: Definitions Provides definitions that are unique to Framework B.

Subpart O: Construction and Manufacturing Requirements Provides requirements regarding construction and manufacturing activities; requirements are consistent with Framework A Subpart E except for internal refer ences.

Subpart P: Requirements for Operation Provides requirements regarding plant operations, including pla nt personnel, maintenance, and programs. The structure of Subpart P parallels Framework A Subp art F in with some exceptions. These exceptions include certain programmatic requi rements derived from the traditional licensing frameworks in Parts 50 and 52 (e.g., asse ssing maintenance effectiveness, environmental qualification of electrical equipment).

Subpart Q: Decommissioning Requirements Provides decommissioning requirements that are consistent with Framework A Subpart G, except for internal references.

Subpart R: Licenses, Certifications, and Approvals Provides design and licensing requirements for the various appl ication types (early site permit, standard design approval, design certification, manufacturing l icense, construction permit, operating license, and combined license). Subpart R is analogou s to Framework A Subpart H, but includes many of the technical requirements foundational an d unique to Framework B (e.g.,

accident analyses, risk evaluations). For additional informatio n see the Technical Requirements section below.

Subpart S: Maintaining and Revising Licensing Basis Information Provides requirements for maintaining licensing basis informati on and is structured identically to Subpart I in Framework A, with some exceptions. Certain require ments have been derived from Parts 50 and 52 (e.g., changes to a facility as described in th e final safety analysis report without prior NRC approval) or adapted to account for Framework B-specific features (e.g.,

maintenance of a risk evaluation to include AERI).

Subpart T: Reporting and Other Administrative Requirements Provides reporting and administrative requirements that are ana logous to Subpart J in Framework A, with some exceptions. Certain provisions were adap ted from Part 50 and 52 to account for the framework-specific approaches to structures, sy stems, and components (SSCs) classification (e.g., immediate notification requirements from § 50.72 and licensee event reports from § 50.73).

Subpart U: Quality Assurance Criteria Provides quality assurance requirements for the design, manufac ture, construction, and operation of certain SSCs. Subpart U is structured similar to Framework A Subpart K, and as Subpart K, the criteria have been sourced from Part 50 Appendix B.

Technical Requirements

In contrast to the structure of technical content of applicatio n requirements in Part 50 and 52, Subpart R features a consolidated listing of technical requirem ents in § 53.4730 that are later referenced, as appropriate, in application-specific sections. T he requirements in § 53.4730 are largely derived from the technical content of application requi rements for a combined license (COL) application in § 52.79 because these requirements general ly encompass the requirements for other application types. The following example illustrates how the Framework B approach compares to the organization of technical content of application requirements in Parts 50 and 52.

Design Certification (DC) and COL applicants under Part 52 are required to provide an analysis and description of the equipment and systems for combustible ga s control by § 52.47(a)(12) and § 52.79(a)(8), respectively. The requirements in each of th ese two paragraphs in Part 52 are identical. Framework B includes a singular, identical, comb ustible gas control requirement in

§ 53.4730(a)(7) that is referenced in the technical content of application requirements for a DC and COL in § 53.4839 and § 53.5016, respectively.

A matrix summarizing § 53.4730 technical requirements reference d by each application type is provided in Enclosure 2.

Alternate Evaluation for Risk Insights (AERI)

The NRC staff recognized that the broad spectrum for which appl icants may eventually pursue licensing under Framework B could include facilities that would have maximum accidents of very low consequence (e.g., low power microreactors). Consideri ng this potential, the NRC staff has proposed an AERI approach for developing risk insights that would support licensing of these facilities. The AERI approach permits the use of alternat e methods for developing risk insights (e.g., qualitative approaches) in lieu of a PRA if an applicant can satisfy the criteria in subparagraph § 53.4730(a)(34)(ii). Applicants and licensees usi ng the AERI approach would still be required to maintain alternate risk evaluations in acc ordance with the requirements of

§ 53.6052, similar to the requirements for maintaining a PRA th at are currently applied to licensees under § 50.71(h).

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