ML23093A212

Annual Report on Westinghouse Electric Company LLC Combustion Engineering Emergency Core Cooling System Performance Evaluation Models for Calendar Year 2022

ML23093A212
Person / Time
Site:	Waterford
Issue date:	04/03/2023
From:	Milster L Entergy Operations
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
W3F1 -2023-0020
Download: ML23093A212 (1)

Text

) entergy Leia Milster Manager Regulatory Assurance 504-739-6250 W3F1 -2023-0020 10 CFR 50.46 April 3, 2023 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

Annual Report on Westinghouse Electric Company LLC Combustion Engineering Emergency Core Cooling System Performance Evaluation Models for Calendar Year 2022 Waterford Steam Electric Station, Unit 3 NRC Docket No. 50-382 Renewed Facility Operating License No. NPF-38 This letter provides the Waterford Steam Electric Station Unit 3 (Waterford 3) 10 CFR 50.46(a)(3)(ii) reporting information pertaining to the Westinghouse Electric Company Emergency Core Cooling System (ECCS) performance Evaluation Models (EMs) for calendar year 2022.

This letter contains no new regulatory commitments.

Should you have any questions or require additional information, please contact Leia Milster, Manager, Regulatory Assurance, at 504-739-6250.

Respectfully,

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Leia Milster LEM/llb Entergy Operations, Inc., 1340 Echelon Parkway, Jackson, MS 39213

W3F1-2023-0020 Page 2 of 2

Enclosure:

Waterford Steam Electric Station Unit 3 10 CFR 50.46 Annual Notification and Reporting for 2022 cc: NRC Region IV Regional Administrator NRC Senior Resident Inspector - Waterford 3 NRC Project Manager - Waterford 3

Enclosure W3F1-2023-0020 Waterford Steam Electric Station Unit 3 10 CFR 50.46 Annual Notificatio n and Reporting for 2022

W3F1 -2023-0020 Enclosure Page 1 of 1 WATERFORD STEAM ELECTRIC STATION UNIT 3 10 CFR 50.46 ANNUAL NOTIFICATION AND REPORTING FOR 2022 There were no changes, error corrections, or enhancements to the 1999 Evaluation Model (EM), which is the EM used in Waterford 3 Large Break Loss-of-Coolant Accident (LBLOCA)

Emergency Core Cooling System (ECCS) performance analysis in calendar year 2022. In addition, there were no changes, error corrections or enhancements to the Supplement 2 Evaluation Model (S2M), which is the EM used in Waterford 3 Small Break Loss-of-Coolant Accident (SBLOCA) ECCS performance analysis in calendar year 2022.

The limiting PCT results for the large and small break LOCAs continue to meet the criteria of 10 CFR 50.46, paragraph (b) for calendar year 2022.

A summary of the information related to peak clad temperatures (PCT) and adjustment to peak clad temperatures is provided in the following table:

Summary of Information for Waterford 3 10 CFR 50.46 Annual Report for 2022 Analysis of Record (AOR)

Peak Clad Temperature Adjustment as (PCT), (°F) of End-of-Year Net PCT at the Evaluation Model (EM) Used (EOY) 2022, EOY 2022, (°F)

(OF)

AOR Date Small-Break 1925 -27 1898 Loss-of-Coolant Accident S2M (SBLOCA) 6/19/2009 Large-Break 2092 -6.6 2085.4 Loss-of-Coolant Accident 1999 EM (LBLOCA) 7/16/2009