ML20137K743
| ML20137K743 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 01/13/1986 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| CDR-85--13, CDR-85-00-13, SBN-923, NUDOCS 8601240203 | |
| Download: ML20137K743 (3) | |
Text
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SEABROOK STATION Engineering Office i
Pubsc Setylce of New Hampshke Now Hampshire Yankee Division January 13, 1986 SBN-923 T.F. Q2.2.2 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 Attention:
Mr. Richard W. Starostecki, Director Division of Project and Resident Programs
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) PSNH Letter SBN-874, dated September 18, 1985, " Interim 10CFR50.55(e) Report; Service Water System Spool Linings, Pipe Inserts and Valve Liner / Seats," J. DeVincentis to R. W. Starostecki
Subject:
Interim 10CFR50.55(e) Report:
Service Water System Spool Linings, Pipe Inserts and Valve Liner / Seats (CDR 85-00-13)
Dear Sir:
In Reference (b), we reported a 10CFR50.55(e) deficiency regarding the failure of Service Water System spool linings, piping inserts and valve liner / seats.
Description of Deficiency During the startup testing of the Service Water System, it was discovered that:
o Some polyurethane linings in pipe spools downstream of throttling valves had become detached.
o Some valve liners and seats were found cracked or bubbled.
o A polyurethane insert from the flanged end of the cement-lined pipe, adjacent to a safety-related valve, detached and wrapped around the butterfly disc preventing the valve from closing.
8601240203 860113 gDR ADOCK 05000443 PDR P.O Box 300 + Seobrock.NHO3874 + Torophone(603)474-9521 g0
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.g United States Nuclear Regulatory Commission Attention:
Mr. Richard W. Starostecki
, Page 2 Safety Implications These deficiencies could cause the flow in either cooling train served by the cooling tower to become degraded and inhibit the function of the system.
Corrective Action After investigation of the failures, a modification program was developed which incorporated materials that have been successfully used in other nuclear power plants.
Corrective actions included:
Replacing linings in polyurethane lined spools, o
o Modifying butterfly valve seat design.
Replacing polyurethane inserts at the flanged ends of cement lined o
pipe.
These corrective actions have been completed and the system returned to service to support continued plant testing.
At an appropriate time prior to fuel loading, after sufficient system operation, we will examine representative portions of the modifications. This examination will serve to demonstrate the durability of the modifications and the ability of the system to perform its safety function during plant operation.
At the conclusion of this examination, we will transmit a final report on this item.
Very truly,yours, f
John DeVincentis, Director Engineering and Licensing cc: Atomic Safety and Licensing Board Service List Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555
g William S. Jordan, III Donald E. Chick Diane Curran Town Manager Ha rmon, Weiss & Jordan Town of Exeter
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20001 S. Screet, N.W.
10 Front Street i
Suite 430 Exeter, NH 03833 Washington, D.C.
20009 4
Brentwood Board of Selectmen Robert G. PE-lis RED Dalton Road Office of the Executive Legal Director Brentwood, NH 03833 U.S. Nuclear Regulatory Commission Washington, DC 20555 Richard E. Sullivan, Mayor City Hall i
Robert A. Backus, Esquire Newbu rypo r t, MA 01950 116 Lowell Street P.O. Box 316 Calvin A. Canney Manc hester, NH 03105 City Manager City Hall Philip Ahrens, Esquire 126 Daniel Street Assistant Attorney General Portsmouth, NH 03801 Augusta, ME 04333 Dana Bisbee, Esquire i
Mr. John B. Tanzer Assistant Attorney General Designated Representative of Office of the Attorney General the Town of Hampton 206 State House Annex 5 Morningside Drive Concord, NH 03301 Hampton, NH 03842 Anne Verge, Chairperson Roberta C. Pevear Board of Selec tmen Designated Representative of Town Hall j
the Town of Hampton Falls Soutb Hampton, NH 03827 1
Drinkwater Road Hampton Falls, NH 03844 Patrick J. McKeon Selectmen's Office l-Mrs. Sandra Gavutis 10 Central Road Designated Representative of Rye, NH 03870 the Town of Kensington RFD 1 Carole F. Kagan, Esquire East Kingston, NH 03827 Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Jo Ann Shotwell, Esquire Washington, DC 20555 Assistant Attorney General Environmental Protection Bureau Mr. Angi Machiros i
Department of the Attorney General Chairman of the Board of Selectmen One Ashburton Place, 19th Floor Town of Newbury Boston, MA 02108 Newbury, MA 01950 Senator Gordon J. Humphrey Town Manager's Office 4
U.S. Senate Town Hall - Friend Street l
Washington, DC 20510 Amesbury, MA 01913 (ATTN: Tom Bu rac k) l Senator Gordon J. Humphrey Diana P. Randall 1 Pillsbury Street i
70 Collins St reet Co nc o rd, NH 03301 Seabrook, NH 03874 (ATTN:
Herb Boynton) 4 ev...-,
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