ML20080G220
| ML20080G220 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 01/30/1995 |
| From: | Feigenbaum T NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-89-001, IEB-89-1, NYN-95011, NUDOCS 9502060335 | |
| Download: ML20080G220 (2) | |
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NortLu North Atlantic Energy Service Corporation 4
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- Atlantic Seabmoh NH 03874 (603) 474-952t, Fax (603) 474-2987 The Northeast Utilities System Ted C. Feigenba am NYN-95011 Senior Vice presistent &
Chief Nuclear OffNr January 30,1995 United States Nuclear Regulatory Commission Washington, D.C. 20555 Attention:
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References:
(a) Facility Operating License No. NPF-86, Docket No. 50-443 (b) NRC Bulletin No. 89-01, Supplement 2 dated June 28, 1991, " Failure of Westinghouse Steam Generator Tube Mechanical Plugs" (c) Westinghouse Repons WCAP-12244 (proprietary version) and WCAP-12245 (non-proprietary version). " Steam Generator Tube Plug Integrity Report," Addendum 2 to 1
Revision 3, dated June,1991 (d) North Atlantic Letter NYN-91121, dated July 30,1991, " Response to NRC Bulletin 89-01, Supplement 2: Failure of Westinghouse Steam Generator Tube Mechanical Plugs" (f) December 22,1994 Meeting NRC and Westinghouse Owners Group
Subject:
Response to Request for Additional Infonnation Regarding Steam Generator Tube Mechanical Plugs Gentlemen:
The NRC Staff requested infonnation regarding steam generator mechanical tube plugs during a meeting uith the Westinghouse Owners Group (WOG) [ Reference (f)]. North Atlantic Energy Service Corporation (North Atlantic) intends to comply with the recommendations set forth in the Westinghouse Owner's Group letter OG-94-107 dated December 30, 1994. This letter provides the requested infonnation for Seabrook Station.
North Atlantic has reviewed the responses to Bulletin 89-01 and its supplements and has
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determined that the conclusions are still valid, and no immediate or short term actions are required.
i Seabrook Station currently has six Alloy 600 mechanical tube plugs installed. These plugs are in the cold legs of the steam generators,1 in "A",2 in "B" and 3 in "C." The six plugs are from lleat Number NX2387, a " group 2" heat as defined by Bulletin 89-01, Supplement 2, and their current life, as determined by WCAP-12244, Revision 3. Addendum 2 [ Reference (c)] is through the year 2061.
Nonh Atlantic will review Addendum 3 of WCAP-12244, Rev. 3, to determine its impact upon the previous conclusions as provided in responses to Bulletin 89-01 [ References (b) and (d)]. This review will address the options of repairing or replacing the installed plugs by the dates calculated in accordance t
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United States Nuclear Regulatory Commission January 30,1995 Attention:.
Document Control Desk Page two with the revised corrosion algorithm orjustifying deferral of actions beyond the calculated dates. North Atlantic will submit an action plan to address the remaining installed plugs at least 30 days prior to the next refueling outage, which is currently scheduled to begin January 6,1996.
Should you have any questions regarding this matter please contact Mr. James M. Peschel, Regulatory Compliance Manager, at (603) 474-9521, extension 3772.
Very tdy/
- yours, to A7n (<
Ted C. Feigenb.
n TCF/JMP:sm cc:
Mr. Thomas T. Martin Regional Administrator U.S. Nuclear Regulatory Commission Region 1 475 Allendale Road King of Prussia, PA 19406 Mr. Albert W. De Agazio, Sr. Project Manager Project Directorate 1-4 Division of Reactor Projects U.S. Nuclear Regulatory Commission Washington, DC 20555 Mr. Richard Laura NRC Senior Resident inspector P.O. Ilox 1149 Seabrook, Nil 03874 1
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