ML25093A260
| ML25093A260 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 04/03/2025 |
| From: | James Drake NRC/NRR/DORL/LPL4 |
| To: | Couture P, Mahan C, Twarog J Entergy Operations |
| Drake, Jason | |
| References | |
| EPID L-2024-LLA-0151 | |
| Download: ML25093A260 (1) | |
Text
From:
Jason Drake To:
Mahan, Cecil; Couture III, Philip; Twarog, John R
Subject:
RAIs for Review: Waterford 3 - REVIEW OF LAR TO EXTEND AOT FOR ONE OR MORE CONTROL ROOM AIR CONDITIONING UNITS INOPERABLE [EPID: L-2024-LLA-0151]
Date:
Thursday, April 3, 2025 1:39:00 PM Attachments:
FINAL RAIs for L-2024-LLA-0151_Waterford 3 Extended AOT LAR.pdf Importance:
High By letter dated October 16, 2024 (ADAMS Accession No. ML24290A141), Entergy Operations, Inc. (Entergy), submitted a license amendment request for Waterford Steam Electric Station, Unit 3 (Waterford 3) to the U.S. NRC for review and approval.
To complete its review, the NRC staff has a request for additional information (RAI) found in the attached document. Please provide your response to the subject RAIs within 30 days from the receipt of this email.
- Regards,
Jason Drake Project Manager Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Phone: (301) 415-8378
1 REQUEST FOR ADDITIONAL INFORMATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION REVIEW OF LICENSE AMENDMENT REQUEST TO EXTEND AOT FOR ONE OR MORE CONTROL ROOM AIR CONDITIONING UNITS INOPERABLE WATERFORD STEAM ELECTRIC STATION, UNIT 3 ENTERGY NUCLEAR OPERATIONS, INC.
DOCKET NO. 05000382 1.0 Background By letter dated October 16, 2024 (ADAMS Accession No. ML24290A141), Entergy Operations, Inc. (Entergy), submitted a license amendment request for Waterford Steam Electric Station, Unit 3 (Waterford 3) to the U.S. NRC for review and approval.
To complete its review of the inspection report, the NRC staff requests the following additional information:
2.0 Regulatory Basis 50.36(b) states Each license authorizing operation of a production or utilization facility of a type described in § 50.21 or § 50.22 will include technical specifications. The technical specifications will be derived from the analyses and evaluation included in the safety analysis report, and amendments thereto, submitted pursuant to § 50.34. The Commission may include such additional technical specifications as the Commission finds appropriate.
The Waterford 3 FSAR includes design bases for the control room air conditioning system in section 9.4.1.1. FSAR section 9.4.1.1.c states the control room air conditioning system is designed to permit personnel occupancy, proper functioning of instrumentation and controls, and prevent the accumulation of flammable gases during all normal and design basis accident conditions assuming a single failure coincident with a loss of offsite power.
Section 15.7.3.4.1 of the FSAR details Design Basis Fuel Handling Accidents, for which the control room air conditioning system would be required assuming a loss of offsite power.
3.0 Questions RAI-01: Although the revised wording would meet the Waterford TS definition of OPERABLE, it does not preserve the design bases assumptions for the system. Explain how FSAR section 9.4.1.1.c would be met during a loss of offsite power with the removal of the current TS 3.7.6.4 action b requirement or with the OPERABLE control room air conditioning unit, required to be in operation by ACTION a, not capable of being powered by an OPERABLE emergency power source.
2 OFFICE NRR/DORL/LPL4/BC RES/DRA/PRAB/PM NRR/DSS/STSB/BC NAME TNakanishi JDrake SMehta DATE 03/13/2025 03/05/2025 01/24/2025