ML20079H158

Interim Deficiency Rept Re Hma Type Relays Mfg by Ge. Initially Reported on 821101.GE Notified to Determine Which Specific Groupings of Hma Relays Are Affected & What Actions Should Be Taken

ML20079H158
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	12/07/1982
From:	Milligan M LONG ISLAND LIGHTING CO.
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
10CFR-050.55E, 10CFR-50.55E, SNRC-806, NUDOCS 8212160065
Download: ML20079H158 (2)

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..:: Amuty; 1 l LONG ISLAND LIGHTING COMPANY SHOREHAM NUCLEAR POWER STATION n : --_ -- - _ . . =N P.O. BOX 618, NORTH COUNTRY ROAD e WADING RIVER N.Y.11792 Direct Dial Number December 7, 1982 SNRC-806 Mr. Ronald C. Haynes Office of Inspection & Enforcement Region I U. S. Nuclear Regulatory Commission King of Prussia, PA 19404 Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322

Dear Mr. Haynes:

On November 8, 1982, in accordance with 10CFR50.55 (e) , we reported verbally to Region 1 a deficiency with H: A type relays manufactured by the General Electric Company. This letter serves as our 30 day written report of this deficiency.

Description of Deficiency During the performance of Startup testing of Shoreham's 4.16KV switchgear breakers, a breaker was observed which failed to operate when called to close. As a result of the investigation of this failure, it was determined that a General Electric (GE) type HMA relay had " hung up" in its energized position after being de-energized. This HMA relay was utilized in the breaker's anti-pump circuit and its failure to open when de-energized prevented the proper operation of the breaker when called to close.

Further investigation and examination of the defective relay indicates that the problem is caused by a rubbing condition between the relay's pivoting contact p] ate and its two stationary contact posts. The problem appears to be sporadic in nature and infrequent in its rate of occurrence. It is surmised that HMA relays exhibiting this defect may have prevented closure of two other switchgear breakers during testing, but that in both these cases, the " hung-up" relay opened while the breakers were being lowered and pulled out of their cubicles for examination. In these cases, the relays and breakers functioned properly during the subsequent inspections. Although HMA relays are utilized in several applications at Shoreham, only one case involving a 4.16KV switchgear breakers has been positively identified.

8212160065 821207 PDR ADOCK 05000322 u S PDR f'C-8 9 35.1

y December 7, 1982 -

SNRC-806 Page 2 Corrective Action-General Electric has been notified of this apparent defect _with our IIMA relays and has been requested to determine- which specific groupings of IIMA relays are affected and what action should be taken to correct any. defective relays found. We are presently

-' awaiting a response from GE before implementing any corrective action.

Since final corrective action has not been developed at this time, a supplemental report will be submitted in 60 days. We anticipate that final corrective action will be provided at that time.

Very truly yours,

, t ,

M. II. Milligan Project Engineer

_. Shoreham Nuclear Power Station TJS:mp cc: Mr. Richard DeYoung, Director NRC Office of Inspection & Enforcement Division of Reactor Operation Inspection Washington, DC 20555 Mr. J. Higgins, NRC Site All parties 1