ML19225B073

LER 79-057/03L-0 on 790624:while Performing Test for Svc Water Operability,Valve Closed & Would Not Reopen Electrically.Caused by Torque Switch Corroding to Switch Shaft.Torque Switch Repaired

ML19225B073
Person / Time
Site:	Hatch
Issue date:	07/10/1979
From:	Dayley C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19225B072	List: ML19225B071 ML19225B073
References
LER-79-057-03L, LER-79-57-3L, NUDOCS 7907230482
Download: ML19225B073 (2)

Text

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i2 l While cerfor. ina u1P-2-3183. Service '.la ter val ve ocerability, 2P41-F315 waLclosed butt

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,3 lwould not reccen electrically. The Reactor Bida. trinced on high condenser cressure 1

,a j due to the lack of cooling. The drvwell internal cressure increased to > .75 PSIG.

_j 3s  ; Cue to the lack of cooling to the drywell ventilation from Re3ctor Bido. chillors

,4 } [ Per Tech. Scecs. 3.6.1.6 crimary containment internal cressure shall not exceed 0.U uealth or Safety. l 4, [csig. There were no ef#ects ucon Public I

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im,  ; The limit torque switch, SMB-000, for valve 2P41-F315A had corncdec to the switch shaf; j

and caused the switch to hang af ter the valve was closed not allcwing the valve to i coen. Recpeneo valve by hand, restarted Reactor Sldg. chiller, recovered dry ell pres:

to less than .75 PSIG within time allowable per Tech. Specs. 3.5.1.6 action state ~nt !

, ,, , and had Trocue switch repaired per M.R. 2-79-3181 and furetional test of valve cont'd D d ) e UE TwCD OF 3-Fa;t; Tv "

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Juif 12, 1979 F232 2 (cont'd) Cause Description and Corrc-ctive Action 2P41-F315A was satisfactcry. Reference previcus LER's 2-78-33, ? . and 2-79-54 , f 9 i /}}