ML25042A427
| ML25042A427 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 02/11/2025 |
| From: | Hauger J Energy Northwest |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| G02-25-039 | |
| Download: ML25042A427 (1) | |
Text
Jeremy S. Hauger Columbia Generating Station P.O. Box 968, PE30 Richland, WA 99352-0968 Ph. 509-377-8727 jshauger@energy-northwest.com GO2-25-039 10 CFR 50.46(a)(3)(ii)
U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001
Subject:
COLUMBIA GENERATING STATION, DOCKET NO. 50-397 REPORT OF CHANGES OR ERRORS IN EMERGENCY CORE COOLING SYSTEM LOSS OF COOLANT ACCIDENT ANALYSIS MODELS PURSUANT TO 10 CFR 50.46
Dear Sir or Madam:
This report is provided in accordance with 10 CFR 50.46(a)(3)(ii), which requires, in part, annual reporting of changes to, or errors in, evaluation models used for calculating Emergency Core Cooling System (ECCS) performance, and an estimate of their effect on the limiting ECCS analysis.
There were no changes or errors reported to Columbia by the fuel vendor. The attached report provides the details related to changes affecting the analysis of record for this reporting period. The licensing basis Peak Clad Temperature for all fuel types in the core UHPDLQVZLWKLQWKHDFFHSWDQFHFULWHULDVHWIRUWKLQ&)5 LH °F).
There are no commitments being made to the Nuclear Regulatory Commission herein. If you have any questions, or require additional information, please contact Mr. Z.K.
Dunham, Manager, Regulatory Affairs, at (509) 377-4735.
Executed on this _______ day of ___________, 2025.
Respectfully, Jeremy S. Hauger Vice President, Engineering
Attachment:
Loss of Coolant Accident Margin Summary Sheet - Annual Report for 2024 cc: NRC Region IV Administrator NRC NRR Project Manager NRC Senior Resident Inspector CD Sonoda - BPA
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February 11, 2025 ENERGY NORTHWEST IA DocuSigned by:
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GO2-25-039 Attachment Page 1 of 1 LOCA Margin Summary Sheet - Annual Report (Per NFM-4-1 Table 7-b)
Plant Name: Columbia Generating Station Utility Name: Energy Northwest Evaluation Model: (Description or Name) GNF-2: SAFER/PRIME-LOCA Models Net PCT Effect Absolute PCT Effect GNF2 Fuel - Prior 10 CFR 50.46 Changes or Error Corrections - Prior year (2024) 0 °F GNF2 Fuel - Prior 10 CFR 50.46 Changes or Error Corrections - This year (2025) 0 °F GNF2 Fuel - Absolute Sum of 10 CFR 50.46 Changes 3&7
0 °F The sum of the PCT (Peak Cladding Temperature) from the most recent analysis using an acceptable evaluation model and the estimates of PCT impact for changes and errors identified since this analysis is less than 2200 °F. PCT prior to this report was 1700 °F for GNF2 fuel.
The current PCT for this report is 1715°F for GNF2 fuel.
References:
- 1. NE-02-03-08 Revision 9, 10CFR50.46 Cumulative PCT - Changes in ECCS LOCA Models
- 2. AR 00464812-01, Provide Licensing Information per 10CFR 50.46(a)(3)(ii)
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