ML20077E463

Interim Deficiency Rept Re Failure of Limitorque Keys Between Motor Pinion Gear & Motor Shaft of Two Motor Operated Valves in RHR Sys.Initially Reported on 830617,in Response to IE Info Notice 81-08.Keys Replaced

ML20077E463
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	07/18/1983
From:	James Smith LONG ISLAND LIGHTING CO.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
10CFR-050.55E, 10CFR-50.55E, IEIN-81-08, IEIN-81-8, SNRC-926, NUDOCS 8307280300
Download: ML20077E463 (3)

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SHOREHAM NUCLEAR POWER STATION P.O. BOX 618, NORTH COUNTRY ROAD + WADING RIVER. N.Y.11792 Direct Dial Number July 18, 1983 SNRC-926 Dr. Thomas E. Murley Regional Administrator Office of Inspection & Enforcement - Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 Limitorque Operator Motor-to-Shaft Key Deficiency - (I.E. Notice 81-08)

Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322

Dear Sir:

On June 17, 1983 we reported verbally in accordance with 10CFR50.55(e) to Region I a deficiency concerning keys between the motor pinion gear and motor shaft of two motor operated valves located in the Residual Heat Removal System. Recent inspection of the keys con-firmed the existence of high shear loading. Both motor operated valves were supplied with Limitorque SB-4-200 valve actuators.

This letter serves as our 30 day report on this deficiency.

Description of Deficiency l

l As a result of I.E. Information Notice 81-08 " Repetitive Failures of Limitorque Operator SMB-4 Motor to Shaft Key" and Limitorque Corporation letter to LILCO dated June 3, 1981 in reference to I.E. Notice 81-08, existing keys between the motor pinion gear and

motor shaft were replaced with type 4140 keys in all potentially i affected actuators. This was done in lieu of hardness testing of

, existing keys. E&DCR's P-3647A, B and C cover this rework for

! Safety Related valves at Shoreham.

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. Work per E&DCR's P-3647A, B and C to replace the keys is complete i

and recent inspection information provided during this rework has confirmed the existence of high shear loading in two instances:

8307280300 830718 PDR ADOCK 05000322 S PDR FC-8935.1

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m July 18, 1983 SNRC-926 -

Page 2 Valve lEll*MOV dO37A - Key sheared in half Valve lEll*MOV-037B - Evidence _of high shear loading A cystem review concerning consequence, imposed by failure of these keys indicates that failure of the keys could-adversely impact operation of the LPCI mode of Residusi ' Heat'~ Removal. Accordingly, it has been determined that this constituted a reportable deficiency. .

Corrective Action As described above, corrective action has been' completed with regard to I.E. Not. ice 81-08 for Shoreham.

Very truly yours, -

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N 1 J. L. Smith Manager, Special Projects Shoreham Nuclear Power Station 7 GML:bc -

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J. Higgins s, All Parties Li,sted in Attachment 1 _ ',

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ATTACHMENT 1 Lawrence Brenner, Esq. Herbert H. Brown, Esq.

Administrative Judge Lawrence Coe Lanpher, Esq.

Atomic Safety and Licensing Karla J. Letsche, Esq.

Board Panel Kirkpatrick, Lockhart, Hill U.S. Nuclear Regulatory Commission Christoper & Phillips Washington, D.C. 20555 8th Floor 1900 M Street, N.W.

Washington, D.C. 20036 Dr.. Peter A. Morris Administrative Judge .

Atomic Safety and Licensing Mr. Marc W. Goldsmith Board Panel Energy Research Group U.S. Nuclear Regulatory Commission 4001 Totten Pond Road Washington, D.C. 20555 - Waltham, Massachusetts 02154 Dr. James H. Carpenter MHB Technical Associates Administrative Judge 1723 Hamilton Avenue Atomic Safety and Licensing Suite K Board Panel . San Jose, California 95125 U.S. Nuclear Regulatory Commission l

Washington, D.C. 20555 '

l . Stephen B. Latham, Esq.

l Twomey, Latham & Shea

- Daniel F. Brown, Esq. 33 West Second Street Attorney P.O. Box 398 Atomic Safety and Licensing Riverhead, New York 11901 Board Panel U.S.. Nuclear Regulatory Commission Washington, D.C. 20555 Ralph Shapiro, Esq.

Cammer and Shapiro, P.C.

9 East 40th Street Bernard M. Bordenick, Esq. New York, New York 10016 David A. Repka, Esq.

I a U.S. Nuclear Regulatory Commission Washington, D.C. 20555 6

', . ' Matthew J. Kelly, Esq.

State of New York Department of Public Service James Dougherty Three Empire State Plaza 30,45 Porter Street Albany, New York 12223

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.ashington, D.C. 20008

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