05000366/LER-1979-057-03, /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

/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: 05000366/LER-1979-057, Forwards LER 79-057/03L-0 05000366/LER-1979-057-03, /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
References
LER-79-057-03L, LER-79-57-3L, NUDOCS 7907230482
Download: ML19225B073 (2)

LER-1979-057, /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

Event date:
Report date:
3661979057R03 - NRC Website

text

.

U. S. NUCL E An RC GUL AT ony ctv.'.a.1is,ica F CH?.. KG LICENSEE EVENT REPORT 7) ccNract occa l l

l l

l 1

(PLE ASE PRINT Ca TYPE ALL nECUIHED INFOnM,itt Ni il i C I A l E l ! l H i 2 !(?! 0 l 0 l - l 0 l 0 l 010 ! O j - l010 l'Tl 4 l1 l1 11 i l l(?!

l In v

a

,v u. u ?. <. - <

a

.+

u.a w e a si a

a

.s L

I? I7lo @ 01711le17 lo l@

r l:',[,"c[ l L !@ l 0 1 S l 0 1 0 1 0 1 3 1 6 I 6 '@ 0 13 1 2 a

is avestoArE o

i t o

o assr oArE w

u cw.<. e a Ew.T oEscaianca no poca AcLt c AsEcusNcts @

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

~

i2

[

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

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

1

,a

Cue to the lack of cooling to the drywell ventilation from Re3ctor Bido. chillors

_j 3s

,4 } [ Per Tech. Scecs. 3.6.1.6 crimary containment internal cressure shall not exceed 0.U uealth or Safety.

l [csig. There were no ef#ects ucon Public 4,

I 80 3is i f CCYP vatvE 3 9 S f 3T!'.1

CAUSE

CAcSE COCE C00E SL9C00E

. COVpCNENT COOE Sys:::E sua;::E [W I Aj @ l E j@ l A l@ l'l I A l L l V 10 ! ? l@ l A l@ l Z j @

131 id 19 N

8 9

'O T3 12 13 REV'S!ON CCCU A R E *.CE REFCAT

. SEOUENTI AL

_EVENTYEAh A EPORT N O.

COOi TvPE N O, O =(E 7c a -l 7i 9i l-l l 0l 5l 7l l/l l013l lL l ll [0_I g = qg 21 22 22 24 26 27 28 23 ~

30 Ji 32 om ACWYENT N

P Al* ? E FO't?

C 0 Y ' O '* E i

AT'a vi TT E :

su ac Sur uEa eeune;-u A CT ;C N FUTy E E::ECT Sra f 0 0.*.N rm. AT:N evatisT VET ca scuas x 101 Ol l

l Yl@

lNl@

p lLl2l0iOl@

1 A'gl Zi@

l ZI@

l Zl@

a,10 u

a a

.6 ao u

42 o

u u

cAuss csscwrics asc cease:Ti.s AcTicNs @

i

The limit torque switch, SMB-000, for valve 2P41-F315A had corncdec to the switch shaf; im, and caused the switch to hang af ter the valve was closed not allcwing the valve to j

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 !

2-79-3181 and furetional test of valve cont'd

, and had Trocue switch repaired per M.R.

D d

)

UE TwCD OF DISCOVERv 0ESCP 7 TION e

3-Fa;t; Tv OTHER ST A T'JS 0 5CC'. E A V NA l

lA!@l Onerc or Otervatien j

O r e. A

%7CWER i 15 { E }@

Ol 01 C}@l sa u

45 46 a,

o a

n A:t vtTv C O N * ; *. T LOC ATION CF aELE AS E AFLEa5;D C'DELEaiE AVCW'.TCFACTWify I

' G l l Z l ~: l Z G.l

'A l

l PA u

i>

u 4s o

.Ense, sit o.cs - Es NL+mt a

?vaE O E 3;nt P Ti;N 39 I

e m I > l l 0 10 10 9~ 1 Z 19

, - r, NA 7't/

VUd N

' 5 a >

ii 12 eus T.a.E t

,W a Ei l

9y p '"'"=}

=

u

,i g 7-m." O 79072 3 l

I1

'l c, a j.n !

M9 22 wc -

.t o

f

]

} l l I l

! I I '

'l $

,a (C ^1 C. + P ssraf g; e

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 / }}