B10877, Interim Deficiency Rept Re Interference & Possible Binding of Itt Grinnell Mechanical Snubbers.Initially Reported on 830408.List of Suspect Hardware to Be Complied & Inspected to Determine Corrective Action.Final Rept by 840101

Interim Deficiency Rept Re Interference & Possible Binding of Itt Grinnell Mechanical Snubbers.Initially Reported on 830408.List of Suspect Hardware to Be Complied & Inspected to Determine Corrective Action.Final Rept by 840101

ML20077M184
Person / Time
Site:	Millstone
Issue date:	08/24/1983
From:	Counsil W NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
10CFR-050.55E, 10CFR-50.55E, B10877, NUDOCS 8309120256
Download: ML20077M184 (2)

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August 24,1983 Docket No. 50-423 B10877 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 J. M. Allan, Millstone Nuclear Power Station, Unit No. 3, Reporting of Potential Significant Deficiencies in Design and Construction: Interference and Possible Binding of ITT Grinnell Mechanical Snubbers (SD-34),

dated April 8,1983.

(2) W. G. Counsilletter to T. E. Murley, Millstone Nuclear Power Station, Unit No. 3, Reporting of Potential Significant Deficiencies in Design and Constructione Interference and Possible Binding of ITT Grinnell Mechanical Snubbers (SD-34),

dated July 7,1983.

Dear Dr. Murley:

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

Interference and Possible Binding of ITT Grinnell Mechanical Snubbers (SD-34)

In Reference (1), Northeast Nuclear Energy Company (NNECO) reported a potential significant deficiency as required by 10CFR50.55(e). The potential deficiency involves interference and possible binding of mechanical snubber hardware manufactured by ITT Grinnell prior to April 1980.

Reference (2) provided written confirmation of a June 30, 1983 telephone conversation between our Mrs. P. C. Bandzes and your Mr. T. Elsasser requesting an extension of the due date for providing the necessary follow-up information.

As yet we are still unable to provide you with a final report in this matter; however, we are providing this interim report in an effort to keep the Staff informed of our intended course of action in resolving this issue.

At present, Stone & Webster is providing Grinnall with a list of snubber hardware and the associated purchase orders. Since only hardware manufactured during a specific time period is suspect, the vendor is to identify the pieces of hardware in which the deficiency may exist. Once this list is completed, an inspection of suspect items will be performed to determine the extent of corrective actions necessary.

8309120256 830824 PDR ADOCK 05000423 S ." D R w

We will provide you with our final report in this matter when this information becomes available, which is expected by January 1,1984.

Based on an August 2,1983 telephone conversation between our Mr. J. L.

Majewski and your Mr. J. Wiggins, we are submitting this interim report on or before August 26,1983.

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY

. . EL W. G. Counsil Senior Vice President t

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