GO2-15-065, Report of Changes or Errors in ECCS LOCA Analysis Models Pursuant 10 CFR 50.46

Report of Changes or Errors in ECCS LOCA Analysis Models Pursuant 10 CFR 50.46

ML15119A311
Person / Time
Site:	Columbia
Issue date:	04/28/2015
From:	Javorik A Energy Northwest
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GO2-15-065
Download: ML15119A311 (3)

Text

April 28, 2015 GO2-15-065

REPORT OF CHANGES OR ERRORS IN ECCS LOCA ANALYSIS MODELS PURSUANT TO 10 CFR 50.46 Page 2 of 2

Attachment:

Loss of Coolant Accident Margin Summary Sheet - Annual Report for 2014 cc: NRC Region IV Administrator NRC NRR Project Manager NRC Senior Resident Inspector/988C CD Sonoda - BPA/1399 WA Horin - Winston & Strawn

REPORT OF CHANGES OR ERRORS IN ECCS LOCA ANALYSIS MODELS PURSUANT TO 10 CFR 50.46 Page 1 of 1 Loss of Coolant Accident Margin Summary Sheet - Annual Report for 2014 Plant Name: Columbia Generating Station Utility Name: Energy Northwest Evaluation Model: (Description or Name) GE14: SAFER/GESTR-LOCA Models, ATRIUM-10: EXEM BWR-2000 ECCS Evaluation Model GE14 Fuel - Prior 10 CFR 50.46 Changes or Net PCT Absolute Error Corrections - This Year Effect PCT Effect 2014 - GE14 Fuel Change 1 PCT = 0°F 0°F 2014 - GE14 Fuel Change 2 PCT = 0°F 0°F 2014 - GE14 Fuel Change 3 PCT = -10ºF 10ºF 2014 - GE14 Fuel Change 4 PCT = 5°F 5°F GE14 Fuel - Absolute Sum of 10 CFR 50.46 PCT = 15°F Changes ATRIUM Prior 10 CFR 50.46 Changes or Net PCT Absolute Error Corrections - This Year Effect PCT Effect 2014 - ATRIUM-10 Fuel - No Changes PCT = 0°F 0°F ATRIUM-10 Fuel - Absolute Sum of 10 CFR PCT = 0°F 50.46 Changes 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 degrees F. PCT prior to report was 1735 ºF for GE14 Fuel and 1603 ºF for ATRIUM-10 fuel. Current PCT including all changes and errors is 1730 ºF for GE14 Fuel and 1603 ºF for ATRIUM-10 fuel.

References:

1. GE Hitachi. "10 CFR 50.46 Notification Letter 2014-01", 21 May 2014.

2. GE Hitachi, "10 CFR 50.46 Notification Letter 2014-02", 21 May 2014

3. GE Hitachi, "10 CFR 50.46 Notification Letter 2014-03", 21 May 2014.

4. GE Hitachi, "10 CFR 50.46 Notification Letter 2014-04", 21 May 2014.

5. NE-02-03-08 Revision 2, "10 CFR 50.46 Cumulative PCT - Changes in ECCS LOCA Models"