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{{Adams
#REDIRECT [[IR 05000317/2021010]]
| number = ML21053A314
| issue date = 02/22/2021
| title = Information Request for a Triennial Baseline Design Bases Assurance Inspection (Team); Inspection Report 05000317/2021010 and 05000318/2021010
| author name = Gray M
| author affiliation = NRC/RGN-I/DRS/EB1
| addressee name = Rhoades D
| addressee affiliation = Exelon Generation Co, LLC, Exelon Nuclear
| docket = 05000317, 05000318
| license number = DPR-053, DPR-069
| contact person = Gray M
| case reference number = IR 2021010
| document type = Inspection Plan, Letter, Request for Additional Information (RAI)
| page count = 8
}}
See also: [[see also::IR 05000317/2021010]]
 
=Text=
{{#Wiki_filter:UNITED STATES
                        NUCLEAR REGULATORY COMMISSION
                                            REGION I
                                2100 RENAISSANCE BLVD., SUITE 100
                          KING OF PRUSSIA, PENNSLYVANIA 19406-2713
                                      February 22, 2021
Mr. David P. Rhoades
Senior Vice President
Exelon Generation Company, LLC
President and Chief Nuclear Officer
Exelon Nuclear
4300 Winfield Road
Warrenville, IL 60555
SUBJECT:        CALVERT CLIFFS NUCLEAR POWER PLANT, UNITS 1 AND 2 -
                INFORMATION REQUEST FOR A TRIENNIAL BASELINE DESIGN BASES
                ASSURANCE INSPECTION (TEAM); INSPECTION REPORT
                05000317/2021010 AND 05000318/2021010
Dear Mr. Rhoades:
The purpose of this letter is to notify you that the U.S. Nuclear Regulatory Commission (NRC)
Region I staff will conduct a Design Bases Assurance Inspection (DBAI) at Calvert Cliffs, Units 1
and 2. Paul Cataldo, a Senior Reactor Inspector from the NRCs Region I Office, will lead the
inspection team. The inspection will be conducted in accordance with Inspection Procedure
71111.21M, Design Bases Assurance Inspection (Team), dated December 8, 2016 (ADAMS
Accession No. ML16340B000).
The inspection will evaluate the capability of risk-significant/low-margin components to function
as designed to support proper system operation. The inspection will also include a review of
selected modifications, operating experience, and as applicable, operator actions.
During a telephone conversation on February 16, 2021, with Mr. Kenneth Greene, Calvert Cliffs
Regulatory Assurance, we confirmed arrangements for the receipt of scoping documents for
information gathering and remote review, and the two-week onsite inspection(**), as follows:
    * Information gathering and remote review: Weeks of March 22 through April 26, 2021
    * Onsite weeks**: Weeks of June 7 and June 21, 2021
    ** Due to the current Covid PHE, some activities may be conducted remotely.
The purpose of the information-gathering and remote review is to identify risk-significant
components, modifications, operator actions, and operating experience items. Information and
documentation needed to support the inspection will also be identified. Frank Arner, a Region I
Senior Risk Analyst, will support Paul Cataldo during the information-gathering visit and remote
review, to evaluate probabilistic risk assessment data and identify components to be examined
during the inspection.
 
D. Rhoades                                          2
Experience with previous baseline design/modification inspections of similar depth and length
has shown this type of inspection is resource intensive, both for the NRC inspectors and the
licensee staff. In order to minimize the inspection impact on the site and to ensure a productive
inspection for both parties, we have enclosed a request for information needed for the
inspection.
It is important that all of these documents are up-to-date and complete in order to minimize the
number of additional documents requested during the preparation and/or the onsite portions of
the inspection. Insofar as possible, this information should be provided electronically to the lead
inspector. The information request has been divided into two groups:
    *  The first group lists information necessary for our initial inspection scoping activities.
        After discussion with Mr. Greene, in recognition of the outage-related activities in March
        2021, a majority of this information that should be easily and readily available for
        uploading to Sharefile, should be provided to the lead inspector by the week of
        March 22, 2021. Additionally, the remainder of the documents not uploaded due to
        outage conflicts should be available to the lead inspector by April 12, 2021. By the week
        of April 26, 2021, the lead inspector will communicate the initial selected set of
        components and modifications.
    *  The second group of documents requested is those items needed to support our in-
        office preparation activities. This set of documents, specific to the selected components
        and modifications, should be provided to the lead inspector no later than May 28, 2021.
        During the in-office preparation activities, the team may identify additional information
        needed to support the inspection, and those items will be communicated directly to
        Mr. Greene.
If there are any questions about the inspection or the material requested in the enclosure,
please contact the lead inspector at 603-395-5536 or via e-mail at pcc1@nrc.gov.
This letter does not contain new or amended information collection requirements subject to the
Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.). Existing information collection
requirements were approved by the Office of Management and Budget, Control Number 3150-
0011. The NRC may not conduct or sponsor, and a person is not required to respond to, a
request for information or an information collection requirement unless the requesting document
displays a currently valid Office of Management and Budget Control Number.
 
D. Rhoades                                        3
This letter and its enclosure will be made available for public inspection and copying at
http://www.nrc.gov/reading-rm/adams.html and at the NRC Public Document Room in
accordance with Title 10 of the Code of Federal Regulations, Part 2.390, Public Inspections,
Exemptions, Requests for Withholding.
                                            Sincerely,
                                                X    /RA/
                                                Signed by: Melvin K. Gray
                                            Mel Gray, Chief
                                            Engineering Branch 1
                                            Division of Reactor Safety
Docket Nos. 05000317 and 05000318
License Nos. DPR-53 and DPR-69
Enclosure:
Document Request for Design Bases
Assurance Inspection
cc: Distribution via ListServ
 
 
ML21053A314
                                            Non-Sensitive                                Publicly Available
      SUNSI Review
                                            Sensitive                                    Non-Publicly Available
  OFFICE        RI/DRS              RI/DRS                RI/DRS
  NAME          PCataldo            FArner                MGray
  DATE          2/17/21            2/17/21                2/22/21
                                         
            DOCUMENT REQUEST FOR DESIGN BASES ASSURANCE INSPECTION
Inspection Report:                05000317/2021010 and 05000318/2021010
Onsite Inspection Dates:          June 7 through June 11, 2021; and
                                  June 21 through June 25, 2021
Inspection Procedure:            Inspection Procedure 71111.21M, Design Bases Assurance
                                  Inspection (Team)
Lead Inspector:                  Paul Cataldo, Senior Reactor Inspector
                                  603-395-5536
                                  PCC1@nrc.gov
  I.    Information Requested for Selection of Components and Modifications
    The following information is requested by March 22, 2021 (and April 12, 2021 for remaining
    documents not provided due to outage-related conflicts) to facilitate inspection preparation.
    Feel free to contact the lead inspector as soon as possible if you have any questions
    regarding this information request. Please provide the information electronically
    (Certrec/Sharefile) in pdf files, Excel, or other searchable formats. Also, we understand
    the prevailing use of Sharefile for inspection-related information for the Exelon fleet,
    therefore, the files should contain descriptive names, and indexed and hyperlinked to
    facilitate ease of use by the inspectors. Information in lists should contain enough
    information to be easily understood by someone who has knowledge of light water reactor
    technology.
    1.    The site probabilistic risk analysis (PRA) System Notebook and latest PRA Summary
          Document.
    2.    Risk ranking of top 250 basic events sorted by Risk Achievement Worth (>/= 1.3).
          Include values for Risk Reduction Worth, Birnbaum Importance, and Fussell-Vesely (as
          applicable). Please provide in an excel spreadsheet or other sortable format, and to
          include an understandable definition of the coded, basic events.
    3.    Risk-ranking of top 100 components from site-specific PRA sorted by Large Early
          Release Frequency.
    4.    If you have an External Events or Fire PRA Model, provide the information requested in
          Items 1 and 2 for external events and fire. Provide narrative description of each coded
          event, including fire and flood zone descriptions.
    5.    List of time-critical and/or risk significant operator actions.
    6.    List of emergency and abnormal operating procedures.
    7.    If available, any pre-existing evaluation or list of components and associated
          calculations with low design margins (e.g., pumps closest to the design limit for flow or
                                                                                          Enclosure
 
      DOCUMENT REQUEST FOR DESIGN BASES ASSURANCE INSPECTION
    pressure, diesel generator close to design required output, heat exchangers close to
    rated design heat removal).
8.  If applicable, copy of any self-assessments and/or Quality Assurance assessments of
    low margin structures, systems and components (SSCs) completed since July 1, 2018.
9.  List of available design margins in both the open and closed direction for valves in the
    motor-operated valve and air-operated valve programs (related to GL 96-05, looking for
    resultant output - matrix of risk vs margin for MOVs and AOVs, as applicable); the fleet
    or Calvert Cliffs-specific MOV Program procedure.
10. The age and capacity of the safety-related DC batteries.
11. The In-Service Testing (IST) Program Basis document identifying the in-scope valves
    and pumps, and the associated IST Program requirements for each component (e.g.,
    IST valve table identifying category, active/passive function).
12. Access to IST trend data for the following pumps for both units: AFW pumps, HPSI
    pumps, LPSI/RHS pumps, and SW pumps. [Note: needed for each discrete component
    (e.g. for each RHR pump)]
13. Listing of MR (a)(1) systems, date entered into (a)(1) status, and brief description of
    why (a)(1); if not included as part of Item 15 below, please include the latest System
    Health report for those systems in (a)(1) status.
14. List of MRFFs evaluations completed since July 1, 2018 (include those determined not
    to be a MRFF).
15. A copy of the most recent System Health and/or trending reports for the following
    systems (as applicable): SR 4KV, SR 480 Vac, HPSI, LPSI/RHS, SW, SR 125 Vdc, and
    EDGs.
16. A copy of the most recent Program Health and/or trending reports for the following
    programs, as applicable: GL 89-10 (MOVs), GL 89-13, IST, AOVs, breakers, relays.
17. List of open operability evaluations, and the associated implementing procedure for
    degraded and non-conforming conditions/operability evaluations; List of formal
    operability evaluations performed for the last 4 years.
18. List of current operator work arounds/burdens.
19. List of permanent plant modifications to SSCs that are field work complete since
    July 1, 2018. For the purpose of this inspection, permanent plant modifications include
    permanent: plant changes, design changes, set point changes, equivalency
    evaluations, suitability analyses, and commercial grade dedications. The list should
    contain the number of each document, title (sufficient to understand the purpose of the
    modification), revision/date, and the affected system. Please provide the design change
    procedure that governs the implementation of the listed and applicable methods.
20. List of calculation changes (including new calculations) that have been issued for use
    since July 1, 2018.
                                              2
 
            DOCUMENT REQUEST FOR DESIGN BASES ASSURANCE INSPECTION
      21. Corrective Action Program procedure.
      22. Procedures addressing the following: modifications, design changes, set point changes,
          equivalency evaluations or suitability analyses, commercial grade dedications, and
          post-modification testing.
      23. List of corrective action documents (open and closed) that address permanent plant
          modifications issues, concerns, or processes, for the past four years; MOV-related
          deficiencies, and any plant-level events that generated root or causal evaluations,
          and/or associated Licensee Event Reports in the last four years.
      24. Any internal/external self-assessments and associated corrective action documents
          generated in preparation for this inspection.
      25. Updated Final Safety Analysis Report, Technical Specifications, Technical
          Specifications Bases, and Technical Requirements Manual.
      26. Electrical simple one-line drawings for 4KV, 480V, & 345KV (scalable for electronic
          viewing preferred).
      27. Copy of Exelons internal responses to any applicable NRC Information Notices,
          Generic Letters, or Regulatory Issue Summaries for the past four years.
      28. A list of NRC Part 21 Reports, determined to be applicable to Calvert Cliffs, for the past
          4 years.
      29. DBDs (if applicable & available): SR 4KV, SR 480 Vac, HPSI, LPSI/RHS, SW, SR 125
          Vdc, and EDGs.
  II.    Information Requested to Be Available by May 28, 2021
This information should be separated for each selected component and modification, especially
if provided electronically (e.g., a folder for each component and modification named after the
component or modification that includes the information requested below). Items 1 through 11
are associated with the selected components and Item 12 is for the selected modifications.
      1.  List of corrective action documents associated with each selected component for the
          past four years.
      2.  Maintenance history (e.g., corrective, preventive, and elective) associated with each
          selected component for the last five years. Identify frequency of preventive
          maintenance activities.
      3.  Aging Management Program documents and/or License Renewal committed inspection
          results applicable to each selected component.
      4.  List of calculations associated with each selected component, excluding data files. Pipe
          stress calculations are excluded from this request.
      5.  System Health Report (last completed) and Design Basis Document associated with
          each selected component, as applicable.
                                                    3
 
      DOCUMENT REQUEST FOR DESIGN BASES ASSURANCE INSPECTION
6.  Access to or copy of vendor manual(s) for each selected component.
7.  List of open temporary modifications associated with each selected component, if
    applicable.
8.  Trend data/graphs on the selected components performance for the past three years
    (e.g., pump performance including IST, other vibration monitoring, oil sample results).
9.  List of normal operating and alarm response procedures associated with each selected
    component.
10. Last completed tests and surveillances for each selected component performed for the
    past three years. For those tests and surveillances performed at a periodicity of greater
    than three years, provide the latest test performed.
11. Schedule of surveillance testing of selected components that occur during the onsite
    and offsite inspection weeks.
12. For each selected modification, copies of associated documents such as modification
    package, engineering changes, 50.59 screening or evaluation, relevant calculations,
    post-modification test packages, associated corrective action documents, design
    drawings, and new/revised preventive maintenance requirements.
                                            4
}}

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