ML24156A176
| ML24156A176 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 06/24/2024 |
| From: | Turner Z Plant Licensing Branch IV |
| To: | Entergy Operations |
| Wengert, Thomas | |
| References | |
| EPID L-2023-LLA-0080, EPID L-2023-LLA-0081 | |
| Download: ML24156A176 (9) | |
Text
June 24, 2024 Vice President, Operations Entergy Operations, Inc.
Grand Gulf Nuclear Station P.O. Box 756 Port Gibson, MS 39150
SUBJECT:
GRAND GULF NUCLEAR STATION, UNIT 1 - REGULATORY AUDIT
SUMMARY
IN SUPPORT OF LICENSE AMENDMENT REQUESTS TO ADOPT TSTF-505, REVISION 2, PROVIDE RISK-INFORMED EXTENDED COMPLETION TIMES - RITSTF INITIATIVE 4b, AND 10 CFR 50.69 RISK-INFORMED CATEGORIZATION AND TREATMENT OF STRUCTURES, SYSTEMS AND COMPONENTS FOR NUCLEAR POWER REACTORS, (EPIDS L-2023-LLA-0081 AND L-2023-LLA-0080)
Dear Vice President,
Operations:
By two letters dated June 6, 2023 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML23158A043 and ML23158A044), as supplemented by letters dated May 1, 2024 (ML24122C611) and June 13, 2024 (ML24165A151), Entergy Operations, Inc.
(Entergy, the licensee) submitted license amendment requests (LARs) to amend the license for Grand Gulf Nuclear Station, Unit 1, Renewed Facility Operating License No. NPF-29. The proposed LARs would adopt Technical Specifications Task Force (TSTF) Traveler TSTF-505, Revision 2, Provide Risk-informed Extended Completion Times, RITSTF Initiative 4b and the provisions of Title 10 of the Code of Federal Regulations (10 CFR), Section 50.69, Risk-informed categorization and treatment of structures, systems and components for nuclear power reactors.
The U.S. Nuclear Regulatory Commission (NRC) staff reviewed the licensee's submittals and determined that a regulatory audit would assist in the timely completion of the licensing review process. The NRC staff issued the regulatory audit plan on August 18, 2023 (ML23226A100).
The NRC staff conducted a virtual regulatory audit from December 4, 2023 to June 21, 2024, to support its review of the LAR. During the regulatory audit, the NRC staff reviewed documents and held discussions with the Entergy staff and its representatives. The regulatory audit summary is enclosed with this letter.
If you have any questions, please contact me at (301) 415-2258 or via email at Zachary.Turner@nrc.gov.
Sincerely,
/RA/
Zachary M. Turner, Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-416
Enclosure:
Regulatory Audit Summary cc: Listserv
Enclosure REGULATORY AUDIT
SUMMARY
IN SUPPORT OF LICENSE AMENDMENT REQUESTS TO ADOPT TSTF-505, REVISION 2, AND 10 CFR 50.69 ENTERGY OPERATIONS, INC GRAND GULF NUCLEAR STATION, UNIT 1 DOCKET NO. 50-416
1.0 INTRODUCTION
By two letters dated June 6, 2023 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML23158A043 and ML23158A044), as supplemented by letters dated May 1, 2024 (ML24122C611) and June 13, 2024 (ML24165A151), Entergy Operations, Inc.
(Entergy, the licensee) submitted license amendment requests (LARs) to amend the license for Grand Gulf Nuclear Station, Unit 1 (Grand Gulf), Renewed Facility Operating License No.
NPF-29. The proposed amendments would adopt Technical Specifications Task Force (TSTF)
Traveler TSTF-505, Revision 2, Provide Risk-informed Extended Completion Times, RITSTF Initiative 4b, and the provisions of Title 10 of the Code of Federal Regulations (10 CFR),
Section 50.69, Risk-informed categorization and treatment of structures, systems and components for nuclear power reactors.
The U.S. Nuclear Regulatory Commission (NRC) staff reviewed the licensee's submittals and determined that a regulatory audit would assist in the timely completion of the licensing review process. The NRC staff issued the regulatory audit plan on August 18, 2023 (ML23226A100),
which detailed the logistics, scheduling, and audit request items.
The NRC staff conducted a virtual regulatory audit from December 4, 2023 to June 21, 2024, to support its review of the LAR. During the regulatory audit, the NRC staff reviewed documents and held discussions with the Entergy staff and its representatives.
The regulatory audit was performed consistent with NRC Office of Nuclear Reactor Regulation (NRR) Office Instruction LIC-111, Revision 1, Regulatory Audits, dated October 31, 2019 (ML19226A274).
2.0 AUDIT ACTIVITIES AND CONCLUSION The audit was conducted via the use of an online reference portal set up by the licensee and webinars. The NRC audit team consisted of NRC staff and contract support from Pacific Northwest National Laboratory (PNNL). Section 3.0 of this audit summary lists the individuals that took part in or attended the audit. Through the online reference portal, the NRC staff and NRC contract support from the PNNL reviewed the licensees documents made available from August 3, 2023 through June 21, 2024. On December 1, 2023, the NRC staff submitted audit questions to the licensee (ML23335A065). A formal, virtual audit meeting with the licensee was held from December 4-6, 2023, to facilitate technical discussions of audit questions according to the audit plan.
Technical discussions were focused on the following major areas: probabilistic risk assessment (PRA), external hazards, technical specifications, and electrical engineering. On December 11, 2023, the NRC staff provided a brief conclusion of the formal, virtual audit meeting including audit objectives that were met and details on the path forward. On February 21, 2024, the NRC staff and the licensee had a virtual clarification meeting. There were no open items from audit discussions and no deviations from the audit plan. Non-docketed information provided by the licensee in response to audit questions and the formal meeting is listed in section 4.0 of this audit summary.
By letters dated May 1, 2024 (ML24122C611) and June 13, 2024 (ML24165A151), the licensee provided supplements that detailed the technical discussion related to the audit questions. The NRC staff reviewed the licensees supplements to assess if any additional information was needed and determined that no additional information would be needed to complete its review of the subject LARs.
3.0 AUDIT PARTICIPANTS NRC Audit Team Name Email LAR Review Area (Organization)
RICT 50.69 Siva Lingam(1)
Siva.Lingam@nrc.gov X
X Plant Licensing Branch LPL IV (LPL4)
Thomas.Wengert@nrc.gov X
X Zach Turner(1)
Zachary.Turner@nrc.gov X
X Plant Licensing Branch LPL II-1 (LPL2-1)
Ching Ng (2)
Ching.Ng@nrc.gov X
PRA Licensing Branch A (APLA)
Todd.Hilsmeier@nrc.gov X
Jigar Patel Jigar.Patel@nrc.gov X
X Thinh Dinh Thinh.Dinh@nrc.gov X
PRA Licensing Branch B (APLB)
Jay Robinson(3)
Jay.Robinson@nrc.gov X
Sunwoo Park Sunwoo.Park@nrc.gov X
X PRA Licensing Branch C (APLC)
Qin Pan Qin.Pan@nrc.gov X
X Hari Kodali Hari.Kodali@nrc.gov X
X Electrical Engineering Branch (EEEB)
Khoi Nguyen Khoi.Nguyen@nrc.gov X
Maurin Scheetz Maurin.Scheetz@nrc.gov X
Operator Licensing and Human Factors Branch (IOLB)
Jack Zhao Jack.Zhao@nrc.gov X
Instrumentation and Controls Branch (EICB)
Gurjendra Bedi Gurjendra.Bedi@nrc.gov X
Mechanical Engineering and Inservice Testing Branch (EMIB)
Michael Breach Michael.Breach@nrc.gov X
Dan Widrevitz Dan.Widrevitz@nrc.gov X
Vessels and Internals Branch (NVIB)
Name Email LAR Review Area (Organization)
RICT 50.69 Fred Forsaty Fred.Forsaty@nrc.gov X
X Nuclear Systems Performance Branch (SNSB)
Andrea Russell Andrea.Russell@nrc.gov X
Technical Specifications Branch (STSB)
Steve Short (4)
X Pacific Northwest National Laboratory (PNNL)
Coles Garill (4)
X Notes:
(1)
NRR Division of Operating Reactor Licensing Project Manager (2)
Technical Lead (3)
Contracting Officer Representative (4)
NRC Contractor Entergy Audit Team Name Organization Eric Dollar Entergy Jeff Hardy Richard Meister Mike Peacock Chris Vera-Burgos ENERCON Ed Coen Harold Stiles Marie Schmehl Michael Chrostowski Neil Johnson Richard Anoba Tim Sande 4.0 DOCUMENTS REVIEWED The licensee provided an extensive list of supporting documents (e.g., analyses, calculations, reports, drawings, and procedures) on the Grand Gulf document portal available during the audit period. Below lists the documents available on the portal that the NRC audit team reviewed during the audit.
Entergy Procedure: Operating Manual 05-1-02-I-7, Off-Normal Event Procedure -
Flooding - Safety Related, December 2, 2023.
Entergy Procedure: Operating Manual 05-1-02-V1-2, Hurricanes, Tornadoes, and Severe Weather, June 19, 2023.
Energy Procedure: Entergy Nuclear Management Manual EN-DC-151, Revision 9, PRA Maintenance and Update.
Entergy Procedure: Entergy Nuclear Management Manual EN-WM-104, Revision 23, On Line Risk Assessment.
Entergy Procedure: Entergy Nuclear Management Manual EN-DC-401, Revision 0, Risk Informed Completion Time.
Entergy Procedure: Entergy Nuclear Management Manual EN-DC-203, Revision 16, Maintenance Rule Program.
Entergy Procedure: Entergy Nuclear Management Manual EN-DC-402, Revision 0, Calculation of RMATs [Risk Management Action Times] and RICTs [Risk-Informed Completion Times].
Entergy Report: Entergy Engineering Report No. GGNS-CS-23-00001, Revision 0, Grand Gulf Seismic High Confidence of Low Probability of Failure (HCLPF)
Determination, April 18, 2023.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-01-DA, Revision 2, GGNS At-Power Level 1 Generic and Plant-Specific Failure Data Development, September 2023.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-01-HR, Revision 1, GGNS PSA [Probabilistic Safety Assessment] - Human Reliability Analysis, September 2017.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-03-FO, Revision 0, Grand Gulf Nuclear Station Fire PRA Peer Review F&Os Closure Report, April 27, 2023.
Entergy Report: Engineering Report No. PSA-GGNS-01-HR-01, Revision 0, GGNS PSA - Impact of Modeling Flex, September 2017.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-01-SOU, Revision 0, Grand Gulf Nuclear Station (GGNS) Internal Events and Internal Flood Sources of Uncertainty, March 2, 2023.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-01-FNO-CLOS, Revision 0, GGNS PSA - Peer Review Findings Closure, September 15, 2017.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-08-UNR, Revision 0, GGNS Impact of Model Uncertainty to RICT Process, May 23, 2023.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-08-UNC, Revision 0, GGNS Impact of Model Uncertainty to 10 CFR 50.69 Categorization Process, May 23, 2023.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-06-05, Revision 2, Grand Gulf Nuclear Station Phoenix RM Model, December 21, 2020.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-03-PRM, Revision 0, Grand Gulf Nuclear Station Fire PRA Plant Response Model, February 24, 2023.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-03-FQ, Revision 0, Grand Gulf Nuclear Station Fire PRA Quantification Notebook, April 27, 2023.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-03-FO, Revision 0, Grand Gulf Nuclear Station Fire PRA Peer Review F&Os [Facts and Observations] Closure Report, April 27, 2023.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-03-UNC, Revision 0, Grand Gulf Nuclear Station Fire PRA Uncertainty and Sensitivity Analysis Notebook, April 27, 2023.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-03-FS, Revision 0, Grand Gulf Nuclear Station Fire PRA Scoping Fire Modeling Report, May 8, 2023.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-03-FSS-02, Revision 0, Grand Gulf Nuclear Station Fire PRA Main Control Room Analysis, May 8, 2023.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-03-HRA, Revision 0, Grand Gulf Nuclear Station Fire PRA Post-Fire Human Reliability, April 27, 2023.
Entergy Report: Entergy Engineering Report No. PSA-GGNS-03-IGN, Revision 0, Grand Gulf Nuclear Station Fire PRA Fire Ignition Frequency, April 27, 2023.
Entergy Report: ENERCON, ENTG#GG052-TMRE-002, GGNS TMRE [Tornado Missile Risk Evaluator] PRA Application, January 19, 2021.
Entergy Report: ENERCON, ENTG-GG-00148-REPT-012, Revision 1,Grand Gulf Nuclear Station Fire PRA Quantification, March 11, 2023.
Entergy Report: ENERCON, ENTG_GG-00176-CALC-002, Evaluation of RICT Seismic Risk Penalty for Grand Gulf Nuclear Station, March 13, 2023.
Entergy Report: ENERCON, ENTG_GG-00176-CALC-001, Evaluation of RICT Duration for Grand Gulf Nuclear Station, May 11, 2023.
Entergy Report: ENERCON, ENTG_GG-00176-REPT-002, Grand Gulf Nuclear Station - RICT Review of Technical Specifications to PRA Model Capability Seismic HCLPF Determination, April 13, 2023.
Entergy Report: ENERCON, ENTG_GG-00176-REPT-006, GGNS Impact of Model Uncertainty to 10 CFR 50.69 Categorization Process, May 11, 2023.
Entergy Report: ENERCON, ENTG_GG-00176-REPT-004, Grand Gulf Seismic HCLPF Determination, February 24, 2023.
Entergy Report: ENERCON, ENTG_GG-00176-REPT-003, Grand Gulf Nuclear Station - Instrumentation Redundancy and Diversity, April 10, 2023.
Entergy Report: ENERCON, ENTG_GG-00176-REPT-005, GGNS Impact of Model Uncertainty to RICT Process, May 11, 2023.
Entergy Table - Level 2 PRA Model Generic Sources of Uncertainties, December 2023.
Boiling Water Reactor Owners Group Report: Grand Gulf Nuclear Station (GGNS) Fire PRA Peer Review Report Using ASME/ANS [American Society of Mechanical Engineers/American Nuclear Society] PRA Standard Requirements, November 2022.
Boiling Water Reactor Owners Group Report: Grand Gulf Nuclear Station (GGNS) PRA Peer Review Report Using ASME/ANS PRA Standard Requirements (Internal Events and Internal Flooding at Power, February 2016.
Entergy Letter to NRC, Individual Plant Examination of External Events (IPEEE)
Schedule Final Submittal, November 15, 1995.
Entergy Letter to NRC, Supplemental Information Pursuant to 10 CFR 50.54(f)
Regarding the Seismic Hazard Walkdowns Conducted to Verify Current Plant Compliance with the Current Licensing Basis (CLB) for Seismic, December 2, 2013 (ML13337A395).
Entergy Letter to NRC, Entergy Seismic Hazard and Screening Report (CEUS [Central and Eastern United States] Sites), Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident, March 31, 2014 (ML14090A098).
- concurrence via email OFFICE NRR/DORL/LPL2-1/PM NRR/DORL/LPL4/LA*
NRR/DRA/APLA/BC*
NAME ZTurner PBlechman BPascarelli DATE 6/4/2024 6/5/2024 6/5/2024 OFFICE NRR/DRA/APLC/BC*
NRR/DSS/STSB/BC*
NRR/DEX/EICB/BC*
NAME SVasavada (SAlferink for) SMehta FSacko DATE 6/6/2024 6/7/2024 6/10/2024 OFFICE NRR/DEX/EEEB/BC*
NRR/DORL/LPL4/BC*
NRR/DORL/LPL2-1/PM*
NAME WMorton JRankin ZTurner DATE 6/21/2024 6/24/2024 6/24/2024