ML23348A122
| ML23348A122 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf, River Bend, Waterford  |
| Issue date: | 12/14/2023 |
| From: | Siva Lingam NRC/NRR/DORL/LPL4 |
| To: | David Williams Entergy Nuclear Operations |
| References | |
| L-2022-LLR-0054 | |
| Download: ML23348A122 (3) | |
Text
From:
Siva Lingam Sent:
Thursday, December 14, 2023 9:14 AM To:
Williams, David Cc:
Jennifer Dixon-Herrity; Jennie Rankin; Thomas Wengert; Bob Pascarelli; Jigar Patel (HQ); Ching Ng; Twarog, John R; Mahan, Cecil; NORRIS, GREGORY P
Subject:
Grand Gulf, River Bend, and Waterford, Unit 3 - 2nd Round of Official RAIs for RR EN-RR-22-001, Use ASME Code Case N-752, Risk informed Categorization for Class 2 and 3 Systems (EPID L-2022-LLR-0054)
In its letter dated June 30, 2022 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML22181B114), supplemented by letter dated April 21, 2023 (ML23111A213), Entergy Operations, LLC, (the licensee, Entergy) submitted an alternative request for Waterford Steam Electric Station, Unit 3 (WF-3). Specifically, Entergy requested to use the alternative requirements of American Society of Mechanical Engineers (ASME) Code Case N-752, Risk-Informed Categorization and Treatment for Repair/Replacement Activities in Class 2 and 3 SystemsSection XI, Division 1, for determining the risk-informed categorization and for implementing alternative treatment for repair/replacement activities on moderate and high energy Class 2 and 3 items in lieu of certain ASME Code Section XI, paragraph IWA-1000, IWA-4000, and IWA-6000 requirements. Entergy submitted the request pursuant to Section 50.55a(z) (1) of Title 10 of the Code of Federal Regulations, which requires the applicant to demonstrate that the proposed alternative would provide an acceptable level of quality and safety.
The U.S. Nuclear Regulatory Commission (NRC) staff has determined that requests for additional information (RAIs) are needed for the staff to complete its review, as discussed below specific to WF-3 only:
Pursuant to 10 CFR 50.55a(z)(1), the probabilistic risk assessment (PRA) must demonstrate an acceptable level of quality to authorize a proposed risk-informed alternative to the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI requirements. Entergys relief request states that the WF-3 PRA model meets the supporting requirements (SRs) for the internal events and internal flooding portions of the ASME PRA standard at Capability Category II or higher. In letter dated August 19, 2022 (ADAMS Accession No. ML22231B160), Response to Request for Additional Information Regarding License Amendment Request to Adopt 10 CFR 50.69 and TSTF-505, Entergy proposed a condition to close Facts and Observations (F&Os) associated with SRs HR-G6, HR-C2, HR-I1 and HR-I2 by utilizing an accepted NRC process (U.S. Nuclear Regulatory Commission Acceptance on Nuclear Energy Institute Appendix X to Guidance 05-04, 07-12, and 12-13, Close-out of Facts and Observations (F&Os)).
- i.
Provide confirmation that the above SRs were closed using an accepted NRC process.
ii. Alternatively, to part i, propose a mechanism to resolve the F&Os, using an accepted NRC process (U.S. Nuclear Regulatory Commission Acceptance on Nuclear Energy Institute Appendix X to Guidance 05-04, 07-12, and 12-13, Close-out of Facts and Observations (F&Os)), prior to implementation of Relief Request EN-RR-22-001 at WF-3.
We sent the draft RAIs to you on December 11, 2013, requesting for any clarification call. You responded on December 13, 2013, that no clarification call is required. Please provide your responses within 30 days from the date of this email.
Siva P. Lingam U.S. Nuclear Regulatory Commission Project Manager Palo Verde Nuclear Generating Station, Units 1, 2, and 3 Grand Gulf Nuclear Station Entergy Fleet Location: O-9E22; Mail Stop: O-9E03 Telephone: 301-415-1564 E-mail address: Siva.Lingam@nrc.gov
Hearing Identifier:
NRR_DRMA Email Number:
2338 Mail Envelope Properties (SJ0PR09MB610980B482960BCCC17206ABF68CA)
Subject:
Grand Gulf, River Bend, and Waterford, Unit 3 - 2nd Round of Official RAIs for RR EN-RR-22-001, Use ASME Code Case N-752, Risk informed Categorization for Class 2 and 3 Systems (EPID L-2022-LLR-0054)
Sent Date:
12/14/2023 9:13:51 AM Received Date:
12/14/2023 9:13:00 AM From:
Siva Lingam Created By:
Siva.Lingam@nrc.gov Recipients:
"Jennifer Dixon-Herrity" <Jennifer.Dixon-Herrity@nrc.gov>
Tracking Status: None "Jennie Rankin" <Jennivine.Rankin@nrc.gov>
Tracking Status: None "Thomas Wengert" <Thomas.Wengert@nrc.gov>
Tracking Status: None "Bob Pascarelli" <Robert.Pascarelli@nrc.gov>
Tracking Status: None "Jigar Patel (HQ)" <Jigar.Patel@nrc.gov>
Tracking Status: None "Ching Ng" <Ching.Ng@nrc.gov>
Tracking Status: None "Twarog, John R" <jtwarog@entergy.com>
Tracking Status: None "Mahan, Cecil" <cmahan@entergy.com>
Tracking Status: None "NORRIS, GREGORY P" <GNORRIS@entergy.com>
Tracking Status: None "Williams, David" <dwillia@entergy.com>
Tracking Status: None Post Office:
SJ0PR09MB6109.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 3306 12/14/2023 9:13:00 AM Options Priority:
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