ML20134H251

Interim Significant Deficiency Rept (SD-75) Re Nonconforming Terminations in CVI Corp Equipment.Initially Reported on 850213.Lugs in Two Remaining CVI Panels Will Have 100% Insp.Next Rept Will Be Submitted by 851008

ML20134H251
Person / Time
Site:	Millstone
Issue date:	08/08/1985
From:	Opeka J, Sears C NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
(SD-75), F0792A, F792A, NUDOCS 8508280336
Download: ML20134H251 (2)

Text

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, (203) 665-5000 August 8,1985 Docket No. 50-423 F0792A Dr. Thomas E. Murley Regional Administrator Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406

References:

(1) W. G. Counsil letter to T. E. Murley, F0698A, dated March 15,1985.

(2) 3. F. Opeka letter to T. E. Murley, F0722A, dated June 12,1985.

Dear Dr. Murley:

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

Nonconforming Terminations in CVI Corporation Equipment (SD-75)

In a February 13, 1985 telephone conversation between your Mr. T. Rebelowski and our Mr. R. K. McCarthy, Northeast Nuclear Energy Company (NNECO) reported a potential significant deficiency in the construction of Millstone Unit No. 3 as required by 10CFR50.55(e).

As noted in Reference (1), the potential significant deficiency involved improper terminations found in equipment supplied by CVI Corporation. Termination deficiencies include crimps which were unacceptable per vendor's instructions, terminations crimped with the wrong tools, multiple conductors crimped in one lug, and incorrect lug size used.

In Reference (2) we determined that this condition represents a significant deficiency in the final design of Millstone Unit No. 3.

We also noted in Reference (2) that a 100% inspection of the lugs in the 2 remaining CVI panels (3 HVC* PNLFLT 1 A and IB) would be performed. Since this work is not yet completed, the corrective action and final report cannot be provided.

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-..a We will provide you with an update on this matter by October 8,1985.

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY ba -

3. F. Opeka Senior Vice President By: C. F. Sears Vice President cc: . Mr. 3. M. Taylor, Director Division of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555 i

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