SBK-L-06070, Reactor Vessel Surveillance Capsule Report

Reactor Vessel Surveillance Capsule Report

ML061030087
Person / Time
Site:	Seabrook
Issue date:	04/10/2006
From:	St.Pierre G Florida Power & Light Energy Seabrook
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
SBK-L-06070
Download: ML061030087 (2)

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FPL Energy Seabrook Station FPL Energy P.O. Box 300 Seabrook, NH 03874 Seabrook Station (603) 773-7000 April 10, 2006 Docket No. 50-443 SBK-L-06070 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001 Seabrook Station Reactor Vessel Surveillance Capsule Report FPL Energy Seabrook, LLC has enclosed a copy of WCAP-16526-NP "Analysis of Capsule Vf from FPL Energy Seabrook Unit I Reactor Vessel Radiation Surveillance Program". This report provides the adjusted reference temperature for nil ductility transition (RTNDT) and fluence calculations for reactor vessel plate, weld, and heat affected zone material that was contained in capsules U, Y and V. This report is submitted pursuant to the requirements of 10 CFR 50.60(a) and 10 CFR Part 50 Appendix H, Reactor Vessel Material Surveillance Program Requirements, paragraph I.A..

WCAP- 16526 concludes that the adjusted RTNDT values for the Seabrook Station reactor vessel materials, based on the surveillance capsule data are within the Regulatory Guide 1.99 Revision 2 predictions. The embrittlement and fluence projections were evaluated and the current Technical Specification PT limit curves and LTOP analysis remain conservative and valid for the current 20 EFPY period of applicability. Therefore, no changes to Seabrook Station Technical Specification pressure-temperature limits or the operating procedures are required The embrittlement calculations in WCAP-16526-NP for the non-limiting beltline welds include updated chemistry values as reported in SBK-L-06071.

an FPL Group company

IC' 0 SBK-L-06070 /Page 2 Should you have any questions regarding this letter, please contact Mr. James M. Pes-hel, Regulatory Programs Manager at (603) 773-7194.

Very truly yours, FPL Energy Seabrook, LLC Gene St. Pierre Site Vice President Enclosure cc: S. J. Collins, NRC Region I Administrator G. E. Miller, NRC Project Manager G. T. Dentel, NRC Resident Inspector