ML20050A452

LER 82-006/01T-0:on 820304,while Performing Maint Re SIL 352 on Pressure Adjustment Mechanism HPCI Stop Valve,Three Broken cap-screws Found.No Cause Determined.Screws Examined, Replaced & Sys Returned to Svc

ML20050A452
Person / Time
Site:	Pilgrim
Issue date:	03/19/1982
From:	Whitney G BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20050A443	List: ML20050A442 ML20050A452
References
LER-82-006-01T, LER-82-6-1T, NUDOCS 8204010304
Download: ML20050A452 (1)

Text

I NRC FOCM 366 U. S. NUCLEAR REGULATORY COMMISSION l (7-77) " ,

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i-EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h l l 012 l [On 3/9/82, while performing maintenance, related to SIL #352, on the pressure adjust- l g 3 ment mechanism of the HPCI stop valve, three (3) of the four (4) cap screws used to  ;

,g,,, y attach the main disk flange to the main disk, were found to be broken. Separation of l closed, pre-

,g,,, ,the flange from the main disk would result in the main disk remaining g

] O l6 l l ig,,,  ; health and safety occurred. ,

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1i l1 l l submitted and vendor support requested to assist in the cause determination. The fourt g ] cap screws were retrieved for examination, replaced in kind and the valve placed in l g l service. An update report will be issued when cause has been determined. l l

gl 80 7 8 9 ST $  % POWER OTHER STATUS DIS O R DISCOVERY DESCR18 TION I1 i5llHlh l0l0l0l@l NA l ] @l Maintenance [

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PERSONNEL EXPOSURES NUMBER DESCRIPTION l2TYPE l NA l Ii I 7 I lo 10 l Ol@ ' "

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