ML20207H477

Final Deficiency Rept CDR-79-00-04 Re Potential Undetectable Failure in P-4 Interlock Circuit of Esfas.Installation of Test Switches & Meters as Recommended by Westinghouse & Procedures for Performing Periodic Testing Completed

ML20207H477
Person / Time
Site:	Seabrook
Issue date:	06/13/1986
From:	Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:	Starostecki R, Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
CDR-79--4, CDR-79-00-04, SBN-1112, NUDOCS 8607240339
Download: ML20207H477 (4)

Text

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EABROOK STATION ngin= ring Offica Pubuc Service of New HompetWre June 13, 1986 NEW HAMPSHIRE YANKEE DIVISION SBN- 1112 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, Directo r Division of Project and Resident Programs (a) Construction Permit CPPR-135, Docket No. 50-443 (b) PSNH Letter (SBN-120), dated May 15, 1980, " Final 10CFR50.55(e) Report", J. DeVincentis to Region I, NRC (c) PSNH Letter (SBN-794), dated April 23, 1985, " Interim 10CFR50.55(e) Report", J. DeVincentis to R.W. Starostecki, Region I, NRC

Subject:

Final 10CFR50.55(e) Report: Potential Undetectable Failure in the Engineered Safety Features Actuation System; Corrective Action Complete (CDR-79-00-04)

Dear Sir:

References (b) and (c) discussed a 10CFR50.55(e) deficiency regarding an undetectable failure in the P-4 interlock circuit of the Engineered Safety Features Actuation System (ESFAS). This deficiency concerned the inability to detect a potential failure in the operation of the P-4 inter-lock contacts (auxiliary contacts from the reactor trip and bypass breakers) and interconnecting wiring during the periodic testing of the ESFAS logic.

The corrective action committed to in Reference (c) was to implement the Westinghouse recommended procedures for periodic testing of the P-4 interlock contacts. In our response to RAI 420.74, we committed to in-stalling permanent test switches and meters for implementing these pro-cedures such that entry into the reactor trip switchgear with portable meters was not required.

8607240339 860613 PDR ADOCK 05000443 S PDR

/CA7 Seabrook Station Construction Field Office . P.O. Box 700 . Seabrook, NH 03874 iO

O O United States Nuclear Regulatory Commission Attention: Mr. Richard W. Starostecki Page 2 The installation of the test switches and meters has been completed and tested. The procedures for performing the periodic testing have also been completed.

Since this completes the corrective action for Unit 1, we consider this the final report. The Unit 2 corrective action will be tracked by a Westinghouse Field Change Notice (FCN).

Very truly yours, g 4wd John DeVincentis Director of Engineering cc: Atomic Safety and Licensing Board Service List Director, Office of Inspection and Enforcement United States Nuclear Regulatory Commission Washington, DC 20555

O 1 O Diane Curran, Esquire Calvin A. Canney Harmon & Weiss City Manager 2001 S. Street, N.W. City Hall Suite 430 126 Daniel Street Washington, D.C. 20009 Portsmouth, NH 03801 .

Sherwin E. Turk, Esq. Stephen E. Merrill, Esquire -

Office of the Executive Legal Director Attorney General U%S. Nuclear Regulatory Commission George Dana Bisbee, Esquire Tenth Floor Assistant Attorney General Washington, DC 20555 Office of the Attorney General 25 Capitol Street Robert A. Backus, Esquire Concord, NH 03301-6397 116 Lowell Street P.O. Box 516 Mr. J. P. Nadeau Manchester, NH 03105 Selectman's Office 10 Central Road Philip Ahrens Esquire Rye, NH 03870 Assistant Attorney General Department of The Attorney General Mr. Angie Machiros Statehouse Station #6 Chairman of the Board of Selectmen Augusta, ME 04333 Town of Newbury Newbury, MA 01950 Mrs. Sandra Cavutis Chairman, Board of Selectmen Mr. William S. Lord RFD 1 - Box 1154 Board of Selectmen Kennsington, NH 03827 Town Hall - Friend Street Amesbury, MA 01913 Carol S. Sneider, Esquire Assistant Attorney General Senator Gordon J. Humphrey Department of the Attorney General 1 Pillsbury Street One Ashburton Place, 19th Floor Concord, NH 03301 Boston, MA 02108 (ATTN: Herb Boynton)

Senator Cordon J. Humphrey H. Joseph Flynn, Esquire U.S. Senate Office of General Counsel Washington, DC 20510 Federal Emergency Management Agency (ATTN: Tom Bursck) 500 C Street, SW Washington, DC 20472 Richard A. Hampe, Esq.

Hampe and McNicholas Paul McEachern, Esquire 35 Pleasant Street Matthew T. Brock, Esquire Concord, NH 03301 Shaines & McEachern 25 Maplewood Avenue Thomas F. Powers, III P.O. Box 360

- Town Manager - Portsmouth, NH 03801 Town of Exeter 10 Front Street Gary W. Holmes, Esq.

- Exeter, NH 03833 Holmes & Ells 47 Winnacunnet Road Brentwood Board of Selectmen Hampton, NH 03842

'RFD Dalton Road Brentwood, NH 03833 Mr. Ed Thomas FEMA Region I Peter J. Mathews, Mayor 442 John W. McCormack PO & Courthouse City Hall Boston, MA 02109 Newburyport, MA 01950 Robert Carrigg Town Office Atlantic Avenue

.-___Nor_t.h Hampton, NH --03862

RECEIVED-REGIGN 1 1983 JUll 16 /3 D 27 O O

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