ML20138P457

Final Deficiency Rept CDR 85-00-15 Re Svc Water Spill in Primary Auxiliary Bldg.Initially Reported on 850918.Exterior Surfaces of Piping Sys Rinsed & Swipe Tested to Remove Residual Seawater

ML20138P457
Person / Time
Site:	Seabrook
Issue date:	10/23/1985
From:	Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:	Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
CDR-85--15, CDR-85-00-15, SBN-883, NUDOCS 8511070168
Download: ML20138P457 (4)

Text

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SEABROOK STATION Engineering Office

, l October 23, 1985 SBN-883 Pubsc service of New HompeNro T.F. Q....

Now Hampshire Yankee Division 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) Telecon of September 18, 1985, H. C. Shaffer and D. E. Groves (YNSD) to J. Beall (Region I)

Subject:

Final 10CFR50.55(e) Report: Service Water Spill (CDR 85-00-15)

Dear Sir:

On September 18, 1985, we reported a potential 10CFR50.55(e) deficiency

[ Reference (b)], regarding a service water spill in the Primary Auxiliary Building (PAB). This deficiency has been determined reportable under the provisions of 10CFR50.55(e).

Description of Deficiency A piping elbow in the A Service Water Train downstream of Valve V-15 was removed for remedial work on the elbow lining. Subsequently, an estimated 30,000 gallons of seawater from the downstream end of the piping was spilled on the top floor of the PAB, eventually flowing down on components on lower floors.

An investigation of the event determined that it was caused by the decision of the tagging authority to leave Valve V-20 open and to accept the open-ended pipe. The open end was at the system highpoint so that even with the other train of service water in operation and not isolated from the open

.end, all flow was down to the discharge structure. When the tunnel heat treatment controls were tested, closing the service water return to the discharge structure, the return valve to the intake structure also failed to open, eliminating any discharge flow at the system low point. Water exited the system overflow line and the open pipe.

8511070168 851023 PDR ADOCK 05000443 S PDR P.O Box 300 Sectrook.NH 03874 . Totophone (603)474-9521 I O P'

United States Nuclear Regulatory Commission Attention: Mr. Richard W. Starostecki Fage 2 The magnitude of the clean-up effort caused the item to be reported under the provision of 10CFR50.55(e).

Safety Implications The wetted items included safety-related stainless and carbon steel piping systems and electrical and control equipment.

There were no personal injuries.

Corrective Action A thorough check of all PAB equipment was made to ensure the identification of all potentially affected equipment. Exterior surfaces of piping systems were rinsed with demineralized water and swipe tested. Results indicated that the rinsing was adequate to remove any residual seawater contamination and that no potential damage could have resulted.

With minor exceptions, wetting of electrical equipment was confined to external surfaces, which were subsequently dried. Those areas with internal moisture were cleaned and dried.

Appropriate disciplinary action has been taken with the test engineer and the details of the event have been discussed with the Shif t Test Engineers.

This is our final report on this item.

Very truly ours, w

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

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l William S. Jordan, III Donald E. Chick Diane Curran Town Manacer Harmon, Weiss & Jordan Town of Exeter 20001 S. Street, N.W. 10 Front Street Suite 430 Exeter, NH 03833 Washington, D.C. 20009 Brentwood Board of Selectmen Robert G. Perlis 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 Robert A. Backus, Esquire Newburyport, MA 01950 116 Lowell Street i

P.O. Box 516 Calvin A. Canney Manc hester, NH 03105 City Manager

City Hall Philip Ahrens, Esqui re 126 Daniel Street j Assistant Attorney General Portsmouth, NH 03801 Augusta, ME 04333 4

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. Designated Representative of Rye, NH 03870 l the Town of Kensington RFD 1 Carole F. Kagan, Esquire

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, One Ashburton Place, 19th Floor Town of Newbury Boston, MA 02108 Newbury, MA 01950 Senator Gordon J. Humphrey Town Manager's Office U.S. Senate Town Hall - Friend Street Washington, DC 20510 Amesbury, MA 01913 (ATTN: Tom Burack)

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