ML20099E391

Final Amended Deficiency Rept,Item 76 Re Limitorque Switch Rotor Failures.Initially Reported on 820731.Repairs Performed Per Maint Instructions MI-M070,M179,M182,M203,M272 & M187

ML20099E391
Person / Time
Site:	Fermi
Issue date:	11/03/1984
From:	Jens W DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
76, NUDOCS 8411210270
Download: ML20099E391 (2)

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' November e 3,~ -19 84 .

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, Mr. , James TG. .Keppler- ~ l'

.. Regional. - Adminis trator-- . .

U...S. Nuclear' Regulatory:Commiss' ion

- Region 1 III- '

, ~799 ' Roosevelt' ' Road '

7 = Glen Ellyn,-.; Illinois, 60137x DearcMr.3 Kepplersi

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References:

(1)- Fermi 2-

'NRC~ Docket No. 50-3'41-(2) Letter,-D. A.' Wells tolJ.~G.,Keppler,

. August-30, 1982, EF2-59390

-( 3 ) Letter, D. A. Wells-to J. G..Keppler, December 28, 1982, EF2-61525 (4) Letter,_W. H. Jens.to J. G. Keppler,-

August 27, 1984, EF2-69662 Subjects -Amended Report of 10CFR50.55(e) Item'76-

"Limitorque-Limit Switch' Rotor Failures" This letter amends Detroit Edison's final. report of Item 76, "Limitorque Limit-Switch Rotor-Failure".- This' item was originally reported as a potential'deficiencyxon July 31,-

1982, and was subsequently documented in References (2), (3) and (.4).

The number of motor operated valves with cracked limit switch assemblies was 17. This number was previously identified incorrectly as 16.

Reference-(4) stated, under corrective action, that Field Modification Request-(FMR) #S-5717 was written to replace

-theTdefective limitiswitch assemblies identified in the in-spection on1Limitorque operators'outside-the primary F . containment. Although the intent >at the time was to replace the defective litait ' switch assemblies, the disposition permitted either repair or-replacement.of the defectiie limit switches. 3 Subsequently, fit was determined that the assemblies could be' repaired. - Therefore, the action taken for Limitorque operators located outside the primary 7

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a Mr.. James G. Keppler November 3, 1984' <

-EF2-69719f Page 2 containment.was'to inspect-the rotary limit switch

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assemblies in all QA Level I Limitorque. motor operated. valve Loperators-and to repair or. replace.any defective rotary

- limit switch assemblies. Repairs. vere performed in the-shop, in accordance with Maintenance Instructions-MI-M070, M179, M182, M203,'M272, and M187.

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If you have questions-concerning this~ matter, please contact

_ Mr. Lewis Bregni at.(313) 586-5083.

Sincerely,.

cc: P. .M.. Byron R..C. DeYoung R. C.' Knop

-USNRC, Document Control Denk j

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