05000366/LER-1981-060-03, /03L-0:on 810622,inboard Reactor Water Cleanup Primary Containment Isolation Valve Found Open in Presence of Isolation Signal.Caused by Attempt to Electrically Close Valve After Backseating to Repair Packing Leak

/03L-0:on 810622,inboard Reactor Water Cleanup Primary Containment Isolation Valve Found Open in Presence of Isolation Signal.Caused by Attempt to Electrically Close Valve After Backseating to Repair Packing Leak

ML20009E576
Person / Time
Site:	Hatch
Issue date:	07/17/1981
From:	GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009E555	List: 05000366/LER-1981-060, Forwards LER 81-060/03L-0 05000366/LER-1981-060-03, /03L-0:on 810622,inboard Reactor Water Cleanup Primary Containment Isolation Valve Found Open in Presence of Isolation Signal.Caused by Attempt to Electrically Close Valve After Backseating to Repair Packing Leak
References
LER-81-060-03L, NUDOCS 8107280307
Download: ML20009E576 (2)

LER-1981-060, /03L-0:on 810622,inboard Reactor Water Cleanup Primary Containment Isolation Valve Found Open in Presence of Isolation Signal.Caused by Attempt to Electrically Close Valve After Backseating to Repair Packing Leak

Event date:
Report date:
3661981060R03 - NRC Website

text

Y a

LICENSEE EVENT REPORT CONTROL SLOCK: l

}

l l

l l

lh (PLEAsE FRINT oR TWE ALL RIQUIRED INFoRMATioN) e 0 l 10 l 0 (l.1 ! l ! ! l 1 l 1 l@

CAT Sa @

l l

o Ill G A E I

u ?

O O 0 0 0 0 25 26 LICENSE TYPE JJ 57 5 3 LICENJEE COCE 14 15 LICENSE NLMSEH 00N'T oii!

,c,"c! 1 @l015!OIO!0!3I6I4 @lnI4 I? I?Io!1 @l017l117I 9 l1 l@

"5'C 60 61 OCCKET NLMSER 68 63 EVENT C ATE 74 75 AEPORT CATE 30 EVENT oEsCRIPTICN ANC pao 8ABLE CoNSECUENCEs h oi} l While the olant was in steadv state coeration at 2100 Wt. Inboard Reactor I

oi3; I Water C'.eanuo (RWCU) Primary Containment Isolation Valve, 2G31-F001,' was I

~

found to be ocen in the cresence of an isolation sional on RWCu. ' out-I d idi L

oi3!I board Valve, 2G31-F004, was Closed and coerable and the inoperative I

i046l l Vdive was reDaired within four hours as recuired bv Tech Saecs 3.6.3.a.1, I

lai'i L so olant oceration was una ffected.

The health and safety of the oublic

,ai,!;

was una ffected.

This is a non-recetitive event.

I SYSTEM

CAUSE

CAUSE i

COMP.

VALVE COCE COCE SUSCOCE COMPCNENT COCE SUSCOCE SUSCOCE lais!

I Cl Gl@ I E l@ l A l@ l VI Al LI v! 01 Pl@ l Ji@ l Zl@

g 3

to 11 12

'3 18 13 20 SECU ENTI A L CCOURRENCE RE W47 REVISION gggfio EVENT YEAR REPCRT NC.

COCE TYPE N C.

@,ag I 81 11 1-1 I of si 01 L_J I of 31 ItI l-1 I ol

_ 21 22 23 24 26 27 23 29 20 31 32 TE N A

CN CN P NT VET MCURS S8 1 FCA 8.

SLPPLIE MANLFAC RER I E l@l 21@

lZl@

12 l@

101010 lo l I Yl@

l NI@

l Al@

L!! 21 Oi Ol@

20 24 25 26 31 40 di 42 43 44 47 CAUSE OESCRIPTICN AND CCARECTIVE ACTICNS IiioIl The inocerable valve had been backseated to eoair a cackino leak andithe i

l l'it !l "close" torcue switch had ocened when an attentot had been made to elec-I li62l 1 trically close the' valve.

The "close" torcue switch was momentarily I

i i63t1 jumcered to move the valve stem from the 5ack seat.

The valve was then I

li64 11 oroven ooerable and returned to service.

l SO 3 9 SA S

%PCvviR CTwER STATUS 1 C ERY OISCOVERY CESCRIPTICN N%

l l A l@l Control Board Walkdown j

i5l(_(j@ l0l3I6!@l i

3 3 10 12 13 44 45 46 60 AC*1V' CONTENT

• ELEASE AMCUNT CF ACTIVITY LOCATICN CF AELEASE l i I s l I z i @D OF RELEASEII !@l NA l

l NA i

3 3 to ti 44 45 30 8E ASCNNEL EXPCSURES Nuv8ER TYPE C ESCRIPTICN ii l:11010101@l zl@l NA I

5 2

PERSCNNE L iN2u'R,ES NLVSEA OESCRIPTtCN i a l 101 0101@l NA I

ii JO 7

3 9 11 12 LCS3 CF CR cab AGE TC FACILITY TYPE OESCRIPTICN l t 19 l l Zl@l NA l

30 7

3 9 to N AC UsE CNLY PU B LICITY CESCRIPTic"'8107280307 8107 ? 7

$suto NA

_j i l i l i l l I I f I Lj i a210llNl@l PDRADOCKOS000g 68 69 30 3

[

. _8 3_ _

f0

. h --

- _1 4

l

'EP No.:

50-366/1981-060 Licensee:

Georgia Power Company Facility:

Plant E. I. Hatch Docket No. :

50-366 l

Narrative

Report

^

for LER 50-366/1981-060 On June 22, 1981, Inboard Reactor Water Clean-up (RUCU) Primary Con-tainment Isolation Yalve, 2G31-F001, was found to be open in the presence of an RWCU Isolation Signal during a control board walkdown.

Cu ttoa rd Valve 2G31-F004 was closed and coerable, and the inoperative valve was repaired in four hours as required by Tech Specs 1.6.3.a. so olant operatinn was una f fec ted.

The heal th and sa fety of the out lic wa, una f fec ted.

The inoperable valve had been backsea ted to repair a packing leal and the "close" torque switch had opened when an attempt had been made to elec-trically cl'ose the valve.

The "close" ' torque switch was momentarily jumpered to move the valve stem from the back seat.

The valve was then proven operable and returned to service.

A g.eneric review found no other occurrences of this type ir. system 2G31 and few torque switch problems during the life of the plant.

W e

b T

+

9 w-~v,_y-g w-v c

.,e-y y

,,__3_