ML24024A210
| ML24024A210 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 01/29/2024 |
| From: | Dennis Galvin NRC/NRR/DORL/LPL4 |
| To: | Peters K Vistra Operations Company |
| Galvin D, NRR/DORL/LPL4 | |
| References | |
| EPID L-2023-LLA-0057 | |
| Download: ML24024A210 (1) | |
Text
January 29, 2024 Mr. Ken J. Peters Senior Vice President and Chief Nuclear Officer Attention: Regulatory Affairs Vistra Operations Company LLC Comanche Peak Nuclear Power Plant 6322 N FM 56 P.O. Box 1002 Glen Rose, TX 76043
SUBJECT:
COMANCHE PEAK NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 -
SUMMARY
OF REGULATORY AUDIT REGARDING A LICENSE AMENDMENT REQUEST TO ADOPT 10 CFR 50.69, RISK-INFORMED CATEGORIZATION AND TREATMENT OF STRUCTURES, SYSTEMS AND COMPONENTS FOR NUCLEAR POWER REACTORS (EPID L-2023-LLA-0057)
Dear Mr. Peters:
By letter dated April 19, 2023 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML23109A333), as supplemented by letters dated June 8, 2023 (ML23159A200) and December 13, 2023 (ML23347A206), Vistra Operations Company LLC (the licensee) submitted a license amendment request (LAR) for Comanche Peak Nuclear Power Plant, Unit Nos. 1 and 2. The proposed amendments would allow, by the addition of license conditions, the implementation of 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.
To support its review, the U.S. Nuclear Regulatory Commission (NRC) staff conducted a regulatory audit via the use of an online reference portal set up by the licensee, and a webinar.
The NRC staff reviewed documents and held discussions with the licensees staff concerning the LAR. The regulatory audit summary is enclosed with this letter.
If you have any questions, please contact me at 301-415-6256 or via email at Dennis.Galvin@nrc.gov.
Sincerely,
/RA/
Dennis J. Galvin, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446
Enclosure:
Audit Summary cc: Listserv
Enclosure OFFICE OF NUCLEAR REACTOR REGULATION REGULATORY AUDIT
SUMMARY
IN SUPPORT OF LICENSE AMENDMENT REQUEST TO ADOPT 10 CFR 50.69, RISK-INFORMED CATEGORIZATION AND TREATMENT OF STRUCTURES, SYSTEMS AND COMPONENTS FOR NUCLEAR POWER REACTORS VISTRA OPERATIONS COMPANY LLC COMANCHE PEAK NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 DOCKET NOS. 50-445 AND 50-446
1.0 BACKGROUND
By letter dated April 19, 2023 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML23109A333), as supplemented by letter dated June 8, 2023 (ML23159A200) and December 13, 2023 (ML23347A206), Vistra Operations Company LLC (the licensee) submitted a license amendment request (LAR) for Comanche Peak Nuclear Power Plant, Unit Nos. 1 and 2. The proposed amendments would allow, by the addition of license conditions, the implementation of 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 NRC staff reviewed the licensees submittal and determined that a regulatory audit would support its review of the proposed license amendments. The audit was conducted in accordance with the audit plan dated August 11, 2023 (ML23226A007), and audit questions emailed October 10, 2023 (ML23283A242). The purpose of the audit was to review the documentation related to the subject of its application (e.g., calculations and reports) that were not submitted on the Comanche Peak docket, to acquire additional understanding about the amendment request, and to determine whether additional information is needed to be docketed to complete the NRC staffs safety evaluation.
2.0 AUDIT ACTIVITIES The audit was conducted via the use of an online reference portal set up by the licensee and webinars. Through the online reference portal, the NRC staff and NRC contract support from the Pacific Northwest National Laboratory (PNNL) reviewed the licensees documents made available from August 11, 2023, through December 31, 2023. The NRC staff also reviewed the licensees responses to the audit questions dated October 10, 2023. The licensee submitted responses to the audit questions in the December 13, 2023, supplement to the LAR.
The NRC staff, contractors, and the licensee conducted a webinar on November 14, 2023. of this audit summary lists the individuals that took part in or attended the audit.
The webinar discussions were focused on the following major technical areas: probabilistic risk assessment and external hazards. At the end of the webinar on November 14, 2023, the NRC presented a brief conclusion of the audit discussions, including audit objectives that were met and details on the path forward. There were no open items from the audit discussions and no deviations from the audit plan. Non-docketed information provided by the licensee and reviewed by the NRC staff is listed in attachment 2 of this audit summary. The licensee committed to issuing a supplement to the applications to provide documentation of certain audit discussion points on the docket, which was completed with the December 13, 2023, supplement.
3.0 RESULTS OF THE AUDIT The audit identified information to be provided on the docket, which the licensee agreed to provide through a supplement to the LAR. The licensee provided the supplement on December 13, 2023. As agreed, at the audit, the supplement provided responses to each of the audit questions and supplemented certain LAR sections as discussed in the audit. Thus, those details are not included in this audit summary.
Attachments:
- 1. List of Audit Participants
- 2. List of Documents Reviewed During Audit
LIST OF AUDIT PARTICIPANTS U.S. Nuclear Regulatory Commission Audit Team Mihaela Biro Dennis Galvin Ching Ng Robert Pascarelli Jay Robinson Daniel Silverstein Keith Tetter Wesley Wu Pacific Northwest National Laboratory Garill Coles Steve Short Mark Wilk Vistra Operations Company LLC Nic Boemisch Jack Hicks Westinghouse Electric Company, LLC James Boatwright Richard Roland Dan Tirsun
LIST OF DOCUMENTS REVIEWED DURING AUDIT The licensee provided an extensive list of supporting documents (e.g., analyses, calculations, reports, drawings, and procedures) on the Comanche Peak Nuclear Power Plant (Comanche Peak or CPNPP) document portal available during the audit period. Below lists the documents available on the portal that the U.S. Nuclear Regulatory Commission audit team reviewed during the audit.
Plant Report R&R-PN-202, Revision 5A, Comanche Peak Nuclear Power Plant, RG 1.200 Compliance, May 2020 Plant Report R&R-PN-205, Revision 5, Comanche Peak Nuclear Power Plant, Screening and Conservative Analysis for Other External Hazards, October 2020.
Plant Report R&R-PN-041, Revision 5, Comanche Peak Nuclear Power Plant, Screening and Conservative Analysis for Other External Hazards, May 2019.
Westinghouse Electric Company Report CN-RAM-13-038, Qualitative Screening, Quantitative Screening, Quantification, and Uncertainty Analysis for CPNPP Fire PRA
[Probabilistic Risk Assessment].
Plant Report EV-TR-2019-006419-6, Revision 0, CPNPP Plant Response to an Open Phase Condition, October 2019.
- concurrence by email NRR-106 OFFICE NRR/DORL/LPL4/PM NRR/DORL/LPL4/LA*
NRR/DRA/APLA/BC*
NAME DGalvin PBlechman RPascarelli DATE 1/25/2024 1/25/2024 1/24/2024 OFFICE NRR/DRA/APLC/BC*
NRR/DORL/LPL4/BC*
NRR/DORL/LPL4/PM*
NAME SVasavada JRankin DGalvin DATE 1/24/2024 1/26/2024 1/29/2024