SBK-L-07103, Annual Reporting of Changes to, or Errors in, Emergency Core Cooling System Models or Applications

Annual Reporting of Changes to, or Errors in, Emergency Core Cooling System Models or Applications

ML072060378
Person / Time
Site:	Seabrook
Issue date:	07/18/2007
From:	St.Pierre G Florida Power & Light Energy Seabrook
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
SBK-L-07103
Download: ML072060378 (3)

Text

FPL Energy Seabrook Station FPL Energy P.O. Box 300 Seabrook, NH 03874 Seabrook Station (603) 773-7000 July 18, 2007 Docket No. 50-443 SBK-L-07103 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001 Seabrook Station Annual Reporting of Changes to, or Errors in, Emergency Core Cooling System Models or Applications In accordance with the requirements of 10 CFR 50.46(a)(3)(ii), FPL Energy Seabrook, LLC submits a tabulation of the current Large Break and Small Break LOCA PCT margin utilization tables applicable to Seabrook Station. The Large Break and Small Break LOCA Analyses of Record were redone to support the stretch power uprate. Compliance with 10 CFR 50.46 requirements is demonstrated by the current composite Large Break LOCA PCT of 1789 'F remaining well below the limit of 2200 'F. The cumulative change in the Large Break LOCA PCT is +5'F from the analysis of record value. The current Small Break LOCA PCT of 1373 'F also remains well below the limit of 2200 'F. There is currently no Small Break LOCA PCT cumulative change.

Should you have any questions regarding this report, please contact Mr. Paul V. Gurney, Reactor Engineering Supervisor, at (603) 773-7776.

Very truly yours, FPL Energy Seabrook, LLC Gene St. Pierre Site Vice President cc: S. J. Collins, NRC Region I Administrator G. E. Miller, NRC Project Manager, Project Directorate 1-2 W. J. Raymond, NRC Senior Resident Inspector an FPL Group company

ENCLOSURE TO SBK-L-07103 li" Seabrook SBLOCA and LBLOCA PCTs Peak Clad Cumulative Temperature Change SBLOCA Analysis of Record value (Ref. 1) 1373 OF 2006 changes (Ref. 3) 0 OF 0 OF 2006 10 CFR 50.46 annual report 1373 OF 0 OF LBLOCA Analysis of Record value (Ref. 1) 1784 OF 2004 permanent assessments (Ref. 2)

Revised blowdown heatup uncertainty assessment +5 OF 5 OF 2006 permanent assessments (Ref. 3)

N/A 0 OF 5 OF 2006 10 CFR 50.46 annual report 1789 OF 5 OF References

1. WCAP-16255-P, Revision 1 "Seabrook Station Stretch Power Uprate Project, NSSS Engineering Report," January 2005.

2. Letter from Gene St. Pierre to USNRC Document Control Desk, "Seabrook Station Annual Reporting of Changes to, or Errors in Emergency Core Cooling System Models or Applications," SBK-L-05160, July 27, 2005.

3. Letter from M. J. Frankel to Jimmie Perryman, "Seabrook Annual 10CFRO.46 Report," NF-NA-07-28, May 1, 2007.