ML20107K174

Interim Significant Deficiency Rept SD-59 Re Design & Const of Control Cabinets Supplied by Westinghouse.Initially Reported on 840919.Program to Identify & Verify Internal Wiring Configuration Initiated.Next Rept by 850115

ML20107K174
Person / Time
Site:	Millstone
Issue date:	10/22/1984
From:	Counsil W NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
F0614A, F614A, SD-59, NUDOCS 8411130026
Download: ML20107K174 (1)

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• • , Z','",["[",, HARTFORD, CONNECTICUT 06141-0270 k k J [14 r .um. ..a.cm,. (203) 665-5000 October 22,1984 Docket No. 50-423 F0614A Dr. Thomas E. Murley Regional Administrator Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406

Dear Dr. Murley:

Millstone Nuclear Power Station, Unit No. 3 Reporting of Potential Significant Deficiencies in Design and Construction:

Westinghouse Process Control Cabinets (SD-59)

In a September 19,1984 telephone conversation between your Mr. T. Rebelowski and our Mr. G. Ballassi, Northeast Nuclear Energy Company (NNECO) reported a potential significant deficiency in the design and construction of Millstone Unit No. 3 as required by 10CFR50.55(e). The potential significant deficiency involves Westinghouse supplied process control cabinets. Wiring installed inside these cabinets was not installed in accordance with the applicable Westinghouse field change instructions.

Northeast Utilities, with the assistance of Westinghouse Corporation, has initiated an inventory program to identify and verify that all internal wiring is configured for its proper application of process control. This program will determine the corrective actions necessary to resolve this potential significant deficiency.

The Millstone Unit No. 3 Senior Resident Inspector, Mr. T. Rebelowski, was notified on October 22, 1984 that this report would be submitted on this date.

We will provide you with an update on this matter by January 15, 1985.

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY 6f p

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W. G. Counsil f477l&

Senior Vice President cc: Mr. R. C. DeYoung, Director Division of Inspection and Enforcement U. S. Nuclear Regulatory Commission Phillips Building 7920 Norfolk Avenue Bethesda, MD 20014 h

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