ML20042A219

Potential Deficiency Rept Re Agastat 7000 Series Time Delay Relays,Initially Reported on 820208.List of Relays Supplied to Facility Being Composed.Amerace Corp Will Supervise Field Disassembly Upon Completion of List

ML20042A219
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	03/10/1982
From:	Milligan M LONG ISLAND LIGHTING CO.
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, SNRC-676, NUDOCS 8203230216
Download: ML20042A219 (2)

Text

. . .

gg LONG ISLAND LIGHTING COM PANY

^ avrwmmst SHOREHAM NUCLEAR POWER STATION P.O. BOX 618. NORTH COUNTRY ROAD e WADING RIVER, N.Y.11792

--s March 10, 1982 SNRC-67,6 a

/) k Mr. Ronald C. Haynes

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Office of Inspection and Enforcement, , '? ,

Region 1 U.S. Nuclear Regulatory Commission /

/

631 Park Avenue ,

King of Prussia, Pa 19406 /gT Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322

Dear Mr. Haynes:

On February 8, 1982, in accordance with 10CFR50.55 (c) , we reported verbally to Region 1 a potential deficiency with Agastat 7000 Series time-delay relays. This letter serves as our 30-day written report of this deficiency, and describes our plans for corrective action.

Description of Potential Deficiency On February 5, 1982, LILCO was informed by Amorace Corp. of a potential defect with Agastat 7000 Series time-delay relays in accordance with the requirements of 10CFR21.

Following a review of this potential defect for applicability to Shoreham, Region 1 was notified as described above. The defect involves diaphragms manufactured by a sub-vendor for Amerace between the 24th week of 1981 and the 3rd week of 1982. Amerace reported that under extended performance QA tests, these diaphragms broke down resulting in loss of air from the volume chamber, thus distorting the time-delay settings. The defective diaphragms were used in approximately 20 percent of the relays produced in the aforementioned time frame.

Corrective Action We have been advised by Amerace that defective relays can be identified by field disassembly and inspection. A detailed ff O ,0

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March 10, 1982 SNRC-676 Page Two Corrective Action (continued) list of Agastat time-delay relays supplied to Shoreham during the time period in question is being composed. Additionally, LILCO has arranged for the Amerace Corp. to supervise the field disassembly and inspection of these relays as soon as the complete list becomes available. As a result of the inspection, defective relays will be replaced or returned to the manufacturer for repair, as appropriate.

A completion report shall be forwarded to'you upon conclusion of required repairs. We anticipate completion of all required repairs by June 1, 1982.

Very truly yours, C

M. H. Milligan Project Engineer Shoreham Nuclear Power Station ,

REH/ dis cc: Mr. Richard DeYoung, Director NRC Office of Inspection and Enforcement Division of Reactor Operation Inspection Washington, D.C. 20555 Mr. J. Higgins, Site NRC i

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