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| issue date = 09/08/2015
| issue date = 09/08/2015
| title = Nuclear Regulatory Commission Plan for the Audit of Duke Energy Carolinas, LLC Interim Evaluations Associated with Reevaluated Seismic Hazard Implementing Near-Term Task Force Recommendation 2.1 - Seismic
| title = Nuclear Regulatory Commission Plan for the Audit of Duke Energy Carolinas, LLC Interim Evaluations Associated with Reevaluated Seismic Hazard Implementing Near-Term Task Force Recommendation 2.1 - Seismic
| author name = DiFrancesco N J
| author name = Difrancesco N
| author affiliation = NRC/NRR/JLD
| author affiliation = NRC/NRR/JLD
| addressee name = Batson S, Capps S D, Henderson K
| addressee name = Batson S, Capps S, Henderson K
| addressee affiliation = Duke Energy Carolinas, LLC, Duke Energy Corp
| addressee affiliation = Duke Energy Carolinas, LLC, Duke Energy Corp
| docket = 05000269, 05000270, 05000287, 05000369, 05000370, 05000413, 05000414
| docket = 05000269, 05000270, 05000287, 05000369, 05000370, 05000413, 05000414
| license number = DPR-038, DPR-047, DPR-055, NPF-009, NPF-017, NPF-035, NPF-052
| license number = DPR-038, DPR-047, DPR-055, NPF-009, NPF-017, NPF-035, NPF-052
| contact person = DiFrancesco N J, NRR/JLD, 415-1115
| contact person = DiFrancesco N, NRR/JLD, 415-1115
| case reference number = TAC MF3689, TAC MF3690, TAC MF3736, TAC MF3737, TAC MF3738, TAC MF3965, TAC MF3966
| case reference number = TAC MF3689, TAC MF3690, TAC MF3736, TAC MF3737, TAC MF3738, TAC MF3965, TAC MF3966
| document type = Audit Plan, Letter
| document type = Audit Plan, Letter
Line 21: Line 21:


==SUBJECT:==
==SUBJECT:==
NUCLEAR REGULATORY COMMISSION PLAN FOR THE AUDIT OF DUKE ENERGY CAROLINAS, LLC AND DUKE ENERGY PROGRESS, INC. INTERIM EVALUATIONS ASSOCIATED WITH REEVALUATED SEISMIC HAZARD IMPLEMENTING NEAR-TERM TASK FORCE RECOMMENDATION 2.1 -SEISMIC FOR: CATAWBA NUCLEAR STATION, UNITS 1 AND 2 (TAC NOS. MF3965 AND MF3966); MCGUIRE NUCLEAR STATION, UNITS 1 AND 2 (TAC NOS. MF3689 AND MF3690); AND OCONEE NUCLEAR STATION, UNITS 1, 2 AND 3 (TAC NOS. MF3736, MF3737, AND MF3738) This letter documents the U.S Nuclear Regulatory Commission (NRC) staff's plan to perform a regulatory audit of Duke Energy Carolinas, LLC (Duke, the licensee) interim evaluations, also referred to as the Expedited Seismic Evaluation Process (ESEP), associated with reevaluated seismic hazard implementing Near-Term Task Force (NTTF) Recommendation 2.1 Seismic for the following plants :
NUCLEAR REGULATORY COMMISSION PLAN FOR THE AUDIT OF DUKE ENERGY CAROLINAS, LLC AND DUKE ENERGY PROGRESS, INC. INTERIM EVALUATIONS ASSOCIATED WITH REEVALUATED SEISMIC HAZARD IMPLEMENTING NEAR-TERM TASK FORCE RECOMMENDATION 2.1 -
* Catawba Nuclear Station, Units 1 and 2 (Catawba)
SEISMIC FOR: CATAWBA NUCLEAR STATION, UNITS 1 AND 2 (TAC NOS.
* McGuire Nuclear Station, Units 1 and 2 (McGuire)
MF3965 AND MF3966); MCGUIRE NUCLEAR STATION, UNITS 1 AND 2 (TAC NOS. MF3689 AND MF3690); AND OCONEE NUCLEAR STATION, UNITS 1, 2 AND 3 (TAC NOS. MF3736, MF3737, AND MF3738)
* Oconee Nuclear Station, Units 1, 2 and 3 (Oconee) The audit will take place in Rockville, MD on Wednesday, September 16, 2015. This technical audit will be performed consistent with NRC Office of Nuclear Reactor Regulation, Office Instruction LIC-111, "Regulatory Audits,''
This letter documents the U.S Nuclear Regulatory Commission (NRC) staff's plan to perform a regulatory audit of Duke Energy Carolinas, LLC (Duke, the licensee) interim evaluations, also referred to as the Expedited Seismic Evaluation Process (ESEP), associated with reevaluated seismic hazard implementing Near-Term Task Force (NTTF) Recommendation 2.1 Seismic for the following plants :
dated December 29, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML082900195).
Catawba Nuclear Station, Units 1 and 2 (Catawba)
The NRC staff will develop an audit summary report to document its observations and conclusions within 90 days of the completion of the audit. The audit will provide the NRC with a better understanding of the ESEP interim evaluations associated with NTTF Recommendation 2.1 "Seismic" and evaluate implementation of the staff's endorsed Electric Power Research Institute (EPRI) guidance1, as described by each of 1 The ESEP guidance document can be found in ADAMS under Accession No. ML 13102A 142. the sites 2. The audit is intended to support the NRC staff review of the ESEP evaluations and the subsequent issuance of letters documenting its review. Additional information is provided below. The enclosed audit plan outlines the process that will allow the NRC staff to review the ESEP related documentation and discuss technical attributes.
McGuire Nuclear Station, Units 1 and 2 (McGuire)
Oconee Nuclear Station, Units 1, 2 and 3 (Oconee)
The audit will take place in Rockville, MD on Wednesday, September 16, 2015. This technical audit will be performed consistent with NRC Office of Nuclear Reactor Regulation, Office Instruction LIC-111, "Regulatory Audits,'' dated December 29, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML082900195). The NRC staff will develop an audit summary report to document its observations and conclusions within 90 days of the completion of the audit.
The audit will provide the NRC with a better understanding of the ESEP interim evaluations associated with NTTF Recommendation 2.1 "Seismic" and evaluate implementation of the staff's endorsed Electric Power Research Institute (EPRI) guidance1, as described by each of 1 The ESEP guidance document can be found in ADAMS under Accession No. ML13102A142.
the sites2. The audit is intended to support the NRC staff review of the ESEP evaluations and the subsequent issuance of letters documenting its review. Additional information is provided below.
The enclosed audit plan outlines the process that will allow the NRC staff to review the ESEP related documentation and discuss technical attributes.
If you have any questions, please contact me at (301) 415-1115 or by e-mail at Nicholas.Difrancesco@nrc.gov.  
If you have any questions, please contact me at (301) 415-1115 or by e-mail at Nicholas.Difrancesco@nrc.gov.  


==Enclosures:==
==Enclosures:==
: 1. Audit Plan 2. Correspondence associated with ESEP reports and NRC staff review 3. List of Addressees cc w/encl: Distribution via Listserv Nicholas J. DiFrancesco, Senior Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation 2 The list of Duke sites that will be audited is included in Enclosure
: 1. Audit Plan
: 2.
: 2. Correspondence associated with ESEP reports and NRC staff review
NUCLEAR REGULATORY COMMISSION PLAN FOR THE AUDIT OF DUKE ENERGY CAROLINAS, LLC INTERIM EVALUATIONS ASSOCIATED WITH REEVALUATED SEISMIC HAZARD IMPLEMENTING NEAR-TERM TASK FORCE RECOMMENDATION 2.1-SEISMIC FOR: CATAWBA NUCLEAR STATION, UNITS 1 AND 2; MCGUIRE NUCLEAR STATION, UNITS 1 AND 2; AND OCONEE NUCLEAR STATION, UNITS 1, 2 AND 3 BACKGROUND AND AUDIT BASIS: On March 12, 2012, the U.S. Nuclear Regulatory Commission (NRC) issued a request for information pursuant to Title 10 of the Code of Federal Regulations ( 1 O CFR) Part 50, Section 50.54(f) (hereafter referred to as the 50.54(f) letter)(Agencywide Documents Access and Management System (ADAMS) Accession No. ML 12053A340).
: 3. List of Addressees cc w/encl: Distribution via Listserv Nicholas J. DiFrancesco, Senior Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation 2 The list of Duke sites that will be audited is included in Enclosure 2.  
The purpose of that request was to gather information concerning, in part, the seismic hazards at operating reactor sites to enable the NRC staff to determine whether your license should be modified, suspended, or revoked. Requested Information Item (6) in Enclosure 1 to the 50.54(f) letter requests licensees to provide an interim evaluation and actions taken or planned to address the higher seismic hazard relative to the design-basis, as appropriate, prior to completion and submission of the seismic risk evaluation.
 
By letter dated April 8, 2013 (ADAMS Accession No. ML 13102A142), the Electric Power Research Institute (EPRI) staff submitted EPRI TR 3002000704 "Seismic Evaluation guidance; Augmented Approach for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic" (hereafter referred to as the guidance).
NUCLEAR REGULATORY COMMISSION PLAN FOR THE AUDIT OF DUKE ENERGY CAROLINAS, LLC INTERIM EVALUATIONS ASSOCIATED WITH REEVALUATED SEISMIC HAZARD IMPLEMENTING NEAR-TERM TASK FORCE RECOMMENDATION 2.1-SEISMIC FOR:
The Augmented Approach (also called the Expedited Seismic Evaluation Process (ESEP)), proposed that licensees would use a simplified seismic margins assessment process to provide additional assurance that key pieces of plant equipment in one safe shutdown pathway would be able to perform certain safety functions following a beyond-design-basis seismic event. By letter dated May 7, 2013, the NRC staff endorsed the guidance.
CATAWBA NUCLEAR STATION, UNITS 1 AND 2; MCGUIRE NUCLEAR STATION, UNITS 1 AND 2; AND OCONEE NUCLEAR STATION, UNITS 1, 2 AND 3 BACKGROUND AND AUDIT BASIS:
The NRC staff is conducting regulatory audits on the licensee's interim evaluations to determine if the information provided met the intent of the ESEP guidance and if licensees responded appropriately to Requested Information Item (6) in Enclosure 1 to the 50.54(f) letter. By letters dated in December 2014 3 , to the NRC, Duke Energy Carolinas, LLC (Duke, the licensee) submitted for NRC review its ESEP evaluations for the sites included in Enclosure
On March 12, 2012, the U.S. Nuclear Regulatory Commission (NRC) issued a request for information pursuant to Title 10 of the Code of Federal Regulations ( 1 O CFR) Part 50, Section 50.54(f) (hereafter referred to as the 50.54(f) letter)(Agencywide Documents Access and Management System (ADAMS) Accession No. ML12053A340). The purpose of that request was to gather information concerning, in part, the seismic hazards at operating reactor sites to enable the NRC staff to determine whether your license should be modified, suspended, or revoked.
: 2. The NRC staff issued a series of requests for additional information (RAI) to gain a better understanding of the information provided in the ESEP reports. The NRC staff continues to review the information provided by Duke and will conduct a regulatory audit of the ESEP evaluations, including the information provided in RAI responses.
Requested Information Item (6) in Enclosure 1 to the 50.54(f) letter requests licensees to provide an interim evaluation and actions taken or planned to address the higher seismic hazard relative to the design-basis, as appropriate, prior to completion and submission of the seismic risk evaluation. By {{letter dated|date=April 8, 2013|text=letter dated April 8, 2013}} (ADAMS Accession No. ML13102A142), the Electric Power Research Institute (EPRI) staff submitted EPRI TR 3002000704 "Seismic Evaluation guidance; Augmented Approach for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic" (hereafter referred to as the guidance). The Augmented Approach (also called the Expedited Seismic Evaluation Process (ESEP)), proposed that licensees would use a simplified seismic margins assessment process to provide additional assurance that key pieces of plant equipment in one safe shutdown pathway would be able to perform certain safety functions following a beyond-design-basis seismic event. By {{letter dated|date=May 7, 2013|text=letter dated May 7, 2013}}, the NRC staff endorsed the guidance.
Specific documents that are planned to be reviewed by the staff during the audit are provided below. 3 Enclosure 2 provides ESEP report dates, ADAMS Accession Nos, RAI response dates and respective ADAMS Accession Nos. Enclosure 1  REGULATORY AUDIT SCOPE AND METHODOLGY:
The NRC staff is conducting regulatory audits on the licensee's interim evaluations to determine if the information provided met the intent of the ESEP guidance and if licensees responded appropriately to Requested Information Item (6) in Enclosure 1 to the 50.54(f) letter.
The scope of this audit will be limited to the information provided and referenced in the ESEP reports and in responses to the NRC staff RAls including implementation of High Confidence of Low Probability of Failure (HCLPF) calculations and fragility analysis performed for specific equipment.
By letters dated in December 20143, to the NRC, Duke Energy Carolinas, LLC (Duke, the licensee) submitted for NRC review its ESEP evaluations for the sites included in Enclosure 2.
The purpose of this audit is to enable the NRC staff to determine if the information provided as part of the ESEP submittals met the intent of the guidance and if licensees responded appropriately to Requested Information Item (6) in Enclosure 1 to the 50.54(f).
The NRC staff issued a series of requests for additional information (RAI) to gain a better understanding of the information provided in the ESEP reports. The NRC staff continues to review the information provided by Duke and will conduct a regulatory audit of the ESEP evaluations, including the information provided in RAI responses. Specific documents that are planned to be reviewed by the staff during the audit are provided below.
3 Enclosure 2 provides ESEP report dates, ADAMS Accession Nos, RAI response dates and respective ADAMS Accession Nos.
REGULATORY AUDIT SCOPE AND METHODOLGY:
The scope of this audit will be limited to the information provided and referenced in the ESEP reports and in responses to the NRC staff RAls including implementation of High Confidence of Low Probability of Failure (HCLPF) calculations and fragility analysis performed for specific equipment. The purpose of this audit is to enable the NRC staff to determine if the information provided as part of the ESEP submittals met the intent of the guidance and if licensees responded appropriately to Requested Information Item (6) in Enclosure 1 to the 50.54(f).
DOCUMENTS REQUESTED FOR STAFF EXAMINATION Oconee, Catawba & McGuire:
DOCUMENTS REQUESTED FOR STAFF EXAMINATION Oconee, Catawba & McGuire:
* Reports/Calculations that demonstrate the clipping method employed by Duke for ESEP as described in the June 9, 2015 telecon/webinar.
Reports/Calculations that demonstrate the clipping method employed by Duke for ESEP as described in the June 9, 2015 telecon/webinar.
* ESEP Report References Requested:
ESEP Report References Requested:
o (9) Oconee Nuclear Station Individual Plant Examination of External Events (I PEEE) Submittal Report, dated December 21, 1995, Duke Power, Seneca, SC. o (10) Duke Energy Calculation OSC-11188, ONS Fukushima NTTF 2.1 Seismic Vendor Support Documents for GMRS, Revision 2, Duke Energy, Seneca, SC. o (19) Seismic PRA/IPEEE Backup Calculations, Duke Energy, Seneca, SC, Rev. 0, 2011, OSC-10225.
o (9) Oconee Nuclear Station Individual Plant Examination of External Events (I PEEE) Submittal Report, dated December 21, 1995, Duke Power, Seneca, SC.
o (20) Letter from W. R. McCollum Jr. to U. S. Nuclear Regulatory Commission, "Oconee Nuclear Station, Docket Nos.: 50-269, -270, -287; Oconee Supplemental IPEEE Submittal Report," dated December 15, 1997, Duke Power, Seneca, SC. o (21) Specification for the Seismic Displacements and Response Spectra for the Turbine, Auxiliary, Reactor, and Standby Shutdown Facility Buildings, Duke Energy, Seneca, SC, Rev. 8, 2005, OSS-027B.00-00-0002.
o (10) Duke Energy Calculation OSC-11188, ONS Fukushima NTTF 2.1 Seismic Vendor Support Documents for GMRS, Revision 2, Duke Energy, Seneca, SC.
NRC AUDIT TEAM: Title Team Member Team Leader, NRR/JLD Stephen Wyman Branch Chief, NRO/DSEA Diane Jackson Technical Lead (NRO/DSEA)
o (19) Seismic PRA/IPEEE Backup Calculations, Duke Energy, Seneca, SC, Rev.
0, 2011, OSC-10225.
o (20) Letter from W. R. McCollum Jr. to U. S. Nuclear Regulatory Commission, "Oconee Nuclear Station, Docket Nos.: 50-269, -270, -287; Oconee Supplemental IPEEE Submittal Report," dated December 15, 1997, Duke Power, Seneca, SC.
o (21) Specification for the Seismic Displacements and Response Spectra for the Turbine, Auxiliary, Reactor, and Standby Shutdown Facility Buildings, Duke Energy, Seneca, SC, Rev. 8, 2005, OSS-027B.00-00-0002.
NRC AUDIT TEAM:
Title Team Member Team Leader, NRR/JLD Stephen Wyman Branch Chief, NRO/DSEA Diane Jackson Technical Lead (NRO/DSEA)
Nilesh Chokshi Technical Support (NRC/NRR)
Nilesh Chokshi Technical Support (NRC/NRR)
Kamal Manoly Technical Support (NRC/NRO)
Kamal Manoly Technical Support (NRC/NRO)
Jim Xu Technical Support (NRC) Dan Huang Technical Support (NRC) Tuan Le Technical Support (NRC) George Wang Technical Support (NRC) Ian Tseng   Ricardo Rodri uez Nick Simes Richard Morante Joe Braverman LOGISTICS:
Jim Xu Technical Support (NRC)
Please provide six hard copies of the requested records. DELIVERABLES:
Dan Huang Technical Support (NRC)
Within 90 days of the audit, the NRC staff will prepare a detailed audit report documenting the information reviewed during the audit, and any open items identified as a result of the audit. The NRC staff will also document its understanding of the proposed resolution of any identified open items.
Tuan Le Technical Support (NRC)
Correspondence Associated with Expedited Seismic Evaluation Process evaluations and staff's review for Duke Sites ESEP Report RAls or Supplements Date of letter Date of letter Plant Name (ADAMS Accession Nos.) (ADAMS Accession Nos.) Catawba Nuclear Station, December 31, 2014 ML 15175A457 Units 1 and 2 (ML 15002A261)
George Wang Technical Support (NRC)
McGuire Nuclear Station, December 17, 2014 RAI dated Units 1 and 2 (ML 15005A085)
Ian Tseng Ricardo Rodri uez Nick Simes Richard Morante Joe Braverman LOGISTICS:
Oconee Nuclear Station, December 19, 2014 ML 15120A017 Units 1, 2 and 3 (ML 14364A213)
Please provide six hard copies of the requested records.
Enclosure 2
DELIVERABLES:
Catawba Nuclear Station Duke Energy Carolinas, LLC Docket Nos. 50-413 and 50-414 License Nos. NPF-35 and NPF-52 Mr. Kelvin Henderson Site Vice President Duke Energy Carolinas, LLC Catawba Nuclear Station 4800 Concord Road York, SC 29745 McGuire Nuclear Station Duke Energy Carolinas, LLC Docket Nos. 50-369 and 50-370 License Nos. NPF-9 and NPF-17 List of Addressees Mr. Steven D. Capps Vice President  
Within 90 days of the audit, the NRC staff will prepare a detailed audit report documenting the information reviewed during the audit, and any open items identified as a result of the audit.
-McGuire Site Duke Energy Carolinas, LLC McGuire Nuclear Station 12700 Hagers Ferry Road Huntersville, NC 28078-8985 Oconee Nuclear Station Duke Energy Carolinas, LLC Docket Nos. 50-269, 50-270 and 50-287 License Nos. DPR-38, DPR-47 and DPR-55 Mr. Scott Batson Vice President, Oconee Nuclear Station Duke Energy Corporation 7800 Rochester Highway Seneca, SC 29672-0752 Enclosure 3  the sites 2. The audit is intended to support the NRC staff review of the ESEP evaluations and the subsequent issuance of letters documenting its review. Additional information is provided below. The enclosed audit plan outlines the process that will allow the NRC staff to review the ESEP related documentation and discuss technical attributes.
The NRC staff will also document its understanding of the proposed resolution of any identified open items.  
 
Correspondence Associated with Expedited Seismic Evaluation Process evaluations and staff's review for Duke Sites ESEP Report RAls or Supplements Date of letter Date of letter Plant Name (ADAMS Accession Nos.)
(ADAMS Accession Nos.)
Catawba Nuclear Station, December 31, 2014 ML15175A457 Units 1 and 2 (ML15002A261)
McGuire Nuclear Station, December 17, 2014 RAI dated Units 1 and 2 (ML15005A085)
Oconee Nuclear Station, December 19, 2014 ML15120A017 Units 1, 2 and 3 (ML14364A213)  
 
Catawba Nuclear Station Duke Energy Carolinas, LLC Docket Nos. 50-413 and 50-414 License Nos. NPF-35 and NPF-52 Mr. Kelvin Henderson Site Vice President Duke Energy Carolinas, LLC Catawba Nuclear Station 4800 Concord Road York, SC 29745 McGuire Nuclear Station Duke Energy Carolinas, LLC Docket Nos. 50-369 and 50-370 License Nos. NPF-9 and NPF-17 List of Addressees Mr. Steven D. Capps Vice President - McGuire Site Duke Energy Carolinas, LLC McGuire Nuclear Station 12700 Hagers Ferry Road Huntersville, NC 28078-8985 Oconee Nuclear Station Duke Energy Carolinas, LLC Docket Nos. 50-269, 50-270 and 50-287 License Nos. DPR-38, DPR-47 and DPR-55 Mr. Scott Batson Vice President, Oconee Nuclear Station Duke Energy Corporation 7800 Rochester Highway Seneca, SC 29672-0752 the sites2. The audit is intended to support the NRC staff review of the ESEP evaluations and the subsequent issuance of letters documenting its review. Additional information is provided below.
The enclosed audit plan outlines the process that will allow the NRC staff to review the ESEP related documentation and discuss technical attributes.
If you have any questions, please contact me at (301) 415-1115 or by e-mail at Nicholas.Difrancesco@nrc.gov.
If you have any questions, please contact me at (301) 415-1115 or by e-mail at Nicholas.Difrancesco@nrc.gov.
Sincerely, IRA/ Nicholas J. DiFrancesco, Senior Project Manager Hazards Management Branch  
Sincerely, IRA/
Nicholas J. DiFrancesco, Senior Project Manager Hazards Management Branch  


==Enclosures:==
==Enclosures:==
: 1. Audit Plan 2. Correspondence associated with ESEP reports and NRC staff review 3. List of Addressees cc w/encl: Distribution via Listserv DISTRIBUTION:
: 1. Audit Plan
: 2. Correspondence associated with ESEP reports and NRC staff review
: 3. List of Addressees cc w/encl: Distribution via Listserv DISTRIBUTION:
Japan Lessons-Learned Division Office of Nuclear Reactor Regulation PUBLIC JLD R/F RidsNRRJLD Resource SWyman, NRR MShams, NRR NDiFrancesco, NRR DJackson, NRR RidsNrrPMCatawba Resource RidsNrrPMOconee Resource RidsNrrPMMcGuire Resource RidsNrrDorllpl2-1 Resporce ADAMS Accession No.: ML15226A185  
Japan Lessons-Learned Division Office of Nuclear Reactor Regulation PUBLIC JLD R/F RidsNRRJLD Resource SWyman, NRR MShams, NRR NDiFrancesco, NRR DJackson, NRR RidsNrrPMCatawba Resource RidsNrrPMOconee Resource RidsNrrPMMcGuire Resource RidsNrrDorllpl2-1 Resporce ADAMS Accession No.: ML15226A185  
*via e-mail OFFICE NRR/JLD/JHMB/PM NRR/JLD/JHMB/LA NRO/DSEA/RGS/BC NRR/JLD/JHMB/BC NRR/JLD/JHMB/PM NAME NDifrancesco Slent DJackson MShams NDifrancesco DATE 08/22/15 08/26/15 08/28/15 08/30/15 09/08/15 OFFICAL RECORD COPY 2 The list of Duke sites that will be audited is included in Enclosure 2.}}
*via e-mail OFFICE NRR/JLD/JHMB/PM NRR/JLD/JHMB/LA NRO/DSEA/RGS/BC NRR/JLD/JHMB/BC NRR/JLD/JHMB/PM NAME NDifrancesco Slent DJackson MShams NDifrancesco DATE 08/22/15 08/26/15 08/28/15 08/30/15 09/08/15 OFFICAL RECORD COPY 2The list of Duke sites that will be audited is included in Enclosure 2.}}

Latest revision as of 09:30, 10 January 2025

Nuclear Regulatory Commission Plan for the Audit of Duke Energy Carolinas, LLC Interim Evaluations Associated with Reevaluated Seismic Hazard Implementing Near-Term Task Force Recommendation 2.1 - Seismic
ML15226A185
Person / Time
Site: Oconee, Mcguire, Catawba, McGuire  Duke Energy icon.png
Issue date: 09/08/2015
From: Nicholas Difrancesco
Japan Lessons-Learned Division
To: Batson S, Capps S, Henderson K
Duke Energy Carolinas, Duke Energy Corp
DiFrancesco N, NRR/JLD, 415-1115
References
TAC MF3689, TAC MF3690, TAC MF3736, TAC MF3737, TAC MF3738, TAC MF3965, TAC MF3966
Download: ML15226A185 (8)
v • d • e


Text

To the Addresees on the Enclosed List UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 September 8, 2015

SUBJECT:

NUCLEAR REGULATORY COMMISSION PLAN FOR THE AUDIT OF DUKE ENERGY CAROLINAS, LLC AND DUKE ENERGY PROGRESS, INC. INTERIM EVALUATIONS ASSOCIATED WITH REEVALUATED SEISMIC HAZARD IMPLEMENTING NEAR-TERM TASK FORCE RECOMMENDATION 2.1 -

SEISMIC FOR: CATAWBA NUCLEAR STATION, UNITS 1 AND 2 (TAC NOS.

MF3965 AND MF3966); MCGUIRE NUCLEAR STATION, UNITS 1 AND 2 (TAC NOS. MF3689 AND MF3690); AND OCONEE NUCLEAR STATION, UNITS 1, 2 AND 3 (TAC NOS. MF3736, MF3737, AND MF3738)

This letter documents the U.S Nuclear Regulatory Commission (NRC) staff's plan to perform a regulatory audit of Duke Energy Carolinas, LLC (Duke, the licensee) interim evaluations, also referred to as the Expedited Seismic Evaluation Process (ESEP), associated with reevaluated seismic hazard implementing Near-Term Task Force (NTTF) Recommendation 2.1 Seismic for the following plants :

Catawba Nuclear Station, Units 1 and 2 (Catawba)

McGuire Nuclear Station, Units 1 and 2 (McGuire)

Oconee Nuclear Station, Units 1, 2 and 3 (Oconee)

The audit will take place in Rockville, MD on Wednesday, September 16, 2015. This technical audit will be performed consistent with NRC Office of Nuclear Reactor Regulation, Office Instruction LIC-111, "Regulatory Audits, dated December 29, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML082900195). The NRC staff will develop an audit summary report to document its observations and conclusions within 90 days of the completion of the audit.

The audit will provide the NRC with a better understanding of the ESEP interim evaluations associated with NTTF Recommendation 2.1 "Seismic" and evaluate implementation of the staff's endorsed Electric Power Research Institute (EPRI) guidance1, as described by each of 1 The ESEP guidance document can be found in ADAMS under Accession No. ML13102A142.

the sites2. The audit is intended to support the NRC staff review of the ESEP evaluations and the subsequent issuance of letters documenting its review. Additional information is provided below.

The enclosed audit plan outlines the process that will allow the NRC staff to review the ESEP related documentation and discuss technical attributes.

If you have any questions, please contact me at (301) 415-1115 or by e-mail at Nicholas.Difrancesco@nrc.gov.

Enclosures:

1. Audit Plan
2. Correspondence associated with ESEP reports and NRC staff review
3. List of Addressees cc w/encl: Distribution via Listserv Nicholas J. DiFrancesco, Senior Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation 2 The list of Duke sites that will be audited is included in Enclosure 2.

NUCLEAR REGULATORY COMMISSION PLAN FOR THE AUDIT OF DUKE ENERGY CAROLINAS, LLC INTERIM EVALUATIONS ASSOCIATED WITH REEVALUATED SEISMIC HAZARD IMPLEMENTING NEAR-TERM TASK FORCE RECOMMENDATION 2.1-SEISMIC FOR:

CATAWBA NUCLEAR STATION, UNITS 1 AND 2; MCGUIRE NUCLEAR STATION, UNITS 1 AND 2; AND OCONEE NUCLEAR STATION, UNITS 1, 2 AND 3 BACKGROUND AND AUDIT BASIS:

On March 12, 2012, the U.S. Nuclear Regulatory Commission (NRC) issued a request for information pursuant to Title 10 of the Code of Federal Regulations ( 1 O CFR) Part 50, Section 50.54(f) (hereafter referred to as the 50.54(f) letter)(Agencywide Documents Access and Management System (ADAMS) Accession No. ML12053A340). The purpose of that request was to gather information concerning, in part, the seismic hazards at operating reactor sites to enable the NRC staff to determine whether your license should be modified, suspended, or revoked.

Requested Information Item (6) in Enclosure 1 to the 50.54(f) letter requests licensees to provide an interim evaluation and actions taken or planned to address the higher seismic hazard relative to the design-basis, as appropriate, prior to completion and submission of the seismic risk evaluation. By letter dated April 8, 2013 (ADAMS Accession No. ML13102A142), the Electric Power Research Institute (EPRI) staff submitted EPRI TR 3002000704 "Seismic Evaluation guidance; Augmented Approach for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic" (hereafter referred to as the guidance). The Augmented Approach (also called the Expedited Seismic Evaluation Process (ESEP)), proposed that licensees would use a simplified seismic margins assessment process to provide additional assurance that key pieces of plant equipment in one safe shutdown pathway would be able to perform certain safety functions following a beyond-design-basis seismic event. By letter dated May 7, 2013, the NRC staff endorsed the guidance.

The NRC staff is conducting regulatory audits on the licensee's interim evaluations to determine if the information provided met the intent of the ESEP guidance and if licensees responded appropriately to Requested Information Item (6) in Enclosure 1 to the 50.54(f) letter.

By letters dated in December 20143, to the NRC, Duke Energy Carolinas, LLC (Duke, the licensee) submitted for NRC review its ESEP evaluations for the sites included in Enclosure 2.

The NRC staff issued a series of requests for additional information (RAI) to gain a better understanding of the information provided in the ESEP reports. The NRC staff continues to review the information provided by Duke and will conduct a regulatory audit of the ESEP evaluations, including the information provided in RAI responses. Specific documents that are planned to be reviewed by the staff during the audit are provided below.

3 Enclosure 2 provides ESEP report dates, ADAMS Accession Nos, RAI response dates and respective ADAMS Accession Nos.

REGULATORY AUDIT SCOPE AND METHODOLGY:

The scope of this audit will be limited to the information provided and referenced in the ESEP reports and in responses to the NRC staff RAls including implementation of High Confidence of Low Probability of Failure (HCLPF) calculations and fragility analysis performed for specific equipment. The purpose of this audit is to enable the NRC staff to determine if the information provided as part of the ESEP submittals met the intent of the guidance and if licensees responded appropriately to Requested Information Item (6) in Enclosure 1 to the 50.54(f).

DOCUMENTS REQUESTED FOR STAFF EXAMINATION Oconee, Catawba & McGuire:

Reports/Calculations that demonstrate the clipping method employed by Duke for ESEP as described in the June 9, 2015 telecon/webinar.

ESEP Report References Requested:

o (9) Oconee Nuclear Station Individual Plant Examination of External Events (I PEEE) Submittal Report, dated December 21, 1995, Duke Power, Seneca, SC.

o (10) Duke Energy Calculation OSC-11188, ONS Fukushima NTTF 2.1 Seismic Vendor Support Documents for GMRS, Revision 2, Duke Energy, Seneca, SC.

o (19) Seismic PRA/IPEEE Backup Calculations, Duke Energy, Seneca, SC, Rev.

0, 2011, OSC-10225.

o (20) Letter from W. R. McCollum Jr. to U. S. Nuclear Regulatory Commission, "Oconee Nuclear Station, Docket Nos.: 50-269, -270, -287; Oconee Supplemental IPEEE Submittal Report," dated December 15, 1997, Duke Power, Seneca, SC.

o (21) Specification for the Seismic Displacements and Response Spectra for the Turbine, Auxiliary, Reactor, and Standby Shutdown Facility Buildings, Duke Energy, Seneca, SC, Rev. 8, 2005, OSS-027B.00-00-0002.

NRC AUDIT TEAM:

Title Team Member Team Leader, NRR/JLD Stephen Wyman Branch Chief, NRO/DSEA Diane Jackson Technical Lead (NRO/DSEA)

Nilesh Chokshi Technical Support (NRC/NRR)

Kamal Manoly Technical Support (NRC/NRO)

Jim Xu Technical Support (NRC)

Dan Huang Technical Support (NRC)

Tuan Le Technical Support (NRC)

George Wang Technical Support (NRC)

Ian Tseng Ricardo Rodri uez Nick Simes Richard Morante Joe Braverman LOGISTICS:

Please provide six hard copies of the requested records.

DELIVERABLES:

Within 90 days of the audit, the NRC staff will prepare a detailed audit report documenting the information reviewed during the audit, and any open items identified as a result of the audit.

The NRC staff will also document its understanding of the proposed resolution of any identified open items.

Correspondence Associated with Expedited Seismic Evaluation Process evaluations and staff's review for Duke Sites ESEP Report RAls or Supplements Date of letter Date of letter Plant Name (ADAMS Accession Nos.)

(ADAMS Accession Nos.)

Catawba Nuclear Station, December 31, 2014 ML15175A457 Units 1 and 2 (ML15002A261)

McGuire Nuclear Station, December 17, 2014 RAI dated Units 1 and 2 (ML15005A085)

Oconee Nuclear Station, December 19, 2014 ML15120A017 Units 1, 2 and 3 (ML14364A213)

Catawba Nuclear Station Duke Energy Carolinas, LLC Docket Nos. 50-413 and 50-414 License Nos. NPF-35 and NPF-52 Mr. Kelvin Henderson Site Vice President Duke Energy Carolinas, LLC Catawba Nuclear Station 4800 Concord Road York, SC 29745 McGuire Nuclear Station Duke Energy Carolinas, LLC Docket Nos. 50-369 and 50-370 License Nos. NPF-9 and NPF-17 List of Addressees Mr. Steven D. Capps Vice President - McGuire Site Duke Energy Carolinas, LLC McGuire Nuclear Station 12700 Hagers Ferry Road Huntersville, NC 28078-8985 Oconee Nuclear Station Duke Energy Carolinas, LLC Docket Nos. 50-269, 50-270 and 50-287 License Nos. DPR-38, DPR-47 and DPR-55 Mr. Scott Batson Vice President, Oconee Nuclear Station Duke Energy Corporation 7800 Rochester Highway Seneca, SC 29672-0752 the sites2. The audit is intended to support the NRC staff review of the ESEP evaluations and the subsequent issuance of letters documenting its review. Additional information is provided below.

The enclosed audit plan outlines the process that will allow the NRC staff to review the ESEP related documentation and discuss technical attributes.

If you have any questions, please contact me at (301) 415-1115 or by e-mail at Nicholas.Difrancesco@nrc.gov.

Sincerely, IRA/

Nicholas J. DiFrancesco, Senior Project Manager Hazards Management Branch

Enclosures:

1. Audit Plan
2. Correspondence associated with ESEP reports and NRC staff review
3. List of Addressees cc w/encl: Distribution via Listserv DISTRIBUTION:

Japan Lessons-Learned Division Office of Nuclear Reactor Regulation PUBLIC JLD R/F RidsNRRJLD Resource SWyman, NRR MShams, NRR NDiFrancesco, NRR DJackson, NRR RidsNrrPMCatawba Resource RidsNrrPMOconee Resource RidsNrrPMMcGuire Resource RidsNrrDorllpl2-1 Resporce ADAMS Accession No.: ML15226A185

  • via e-mail OFFICE NRR/JLD/JHMB/PM NRR/JLD/JHMB/LA NRO/DSEA/RGS/BC NRR/JLD/JHMB/BC NRR/JLD/JHMB/PM NAME NDifrancesco Slent DJackson MShams NDifrancesco DATE 08/22/15 08/26/15 08/28/15 08/30/15 09/08/15 OFFICAL RECORD COPY 2The list of Duke sites that will be audited is included in Enclosure 2.
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