ML19253B694

LER 79-005/03L-0:on 790924,rod Block Gaseous Radiation Monitors Were Inoperable When Containment Isolation Valve on Monitor Return Line Failed Closed.Caused by Hole in Operator Diaphragm.Diaphragm Replaced

ML19253B694
Person / Time
Site:	Oconee
Issue date:	10/10/1979
From:	Lewis S DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML16148A259	List: ML16148A258 ML19253B694
References
LER-79-005-03L-02, LER-79-5-3L-2, NUDOCS 7910170247
Download: ML19253B694 (1)

Text

~ .

700R~0R GINAL

=ac scau :s. u.s.nuctsam ascutarcav ccumissem tr.m UCENSEE EVENT REPORT' EXHIBIT A cenract stocx: 1 I l ! I l l vts.4ss ratur en tvet ALL macusaso impomwancut i .@

oi- l l r . ISIClNIElEI2((?)u010

. uCu.u.c o. i. ' l- ! O ucasa I 0101010 ..a l- 1010 a l@411111 a uco. . n. Il !!@[uwa@

r cen r -

osi

> e 1"'i L@l.0151 O fsoca L tu0121

.s... 7f 0@l u O ! 91214 n aaT=.ru I 719 @l n110ai11

1. cat 10 o.ra l 7 l9 l@

EvsNr esscaimen Ano naceaata c=usscussess @

o.: IThe RB gaseous radiation monitors were rendered inoperable when a containment l

,,,,, isolation valve on the monitors' return line failed closed. The valve was 3.. l repaired and the monitors were returned to service well within the times g 2is fallowed bv Technical Soecifications 3.1.6.8 and 3.6.3. In addition, two 1

, , , ;other means for detecting RCS leakage were available. Therefore, this incident, ser 'was of no sienificance wi th resnett to safe coeration, and the health and I

,,, , safety of the public were not endangered. g

. .. -

= , . m .

.mm. m.. . C.,m=,. c_ . =.. m.m , . ..<,,

,s. ..

2ist

, . la i s l@ [E j@ L..F J @ IV l A I 1, IV IE IX !@ {@ .@ @

. ..

_

.. .. .. ,.

CCCg' a.ge C A tV'52CM.

o m.. . I.E.C,bi.trTIAL T o. .=.u a g pc.,es? .

@ :u...

=: . i7: oi

. =

i-i

=

in loi si, id 10 13 i i ti L,,-: e

,. n  ;. , , u w;:: m ::  ::n ws- ., c.w ,;:: a.  ::.3=,r 2.w::.a

(. @W@ m m l Z l@ Q@

m u l 0 l O! 0@10

. 0. @

.

l lY Ig l L l@ lI l 2l 0l ag ,,

.cauts :ssessmes Ano ccanstnvs Ac icNs @

iio i The valve failed due to a hole in its operator dic.phraga, which is believed ,

, , , ,to have exceeded its expected service life. The diaphragm was replaced, and ,

. Jhe valve was tested to verify operability. The preventive maintenance pro- ,

pg gram will be revised to review ES valves to identify those with diaphragms

,,. ineeding replacement. i

? a s se rV3 %PCWGM CThtA37ATb3 31 OW RT Ol$COvtRv Ct3CpirTICas i i s ! Id@ In 10-1 2 I@l NA l lB!@l Routine ES valve test l 7 8 y 13 13 ** 48 de se

• (LIAst3 Op.gLgAsg aanowny e, aC Ivtiv LOCAftCM Cy ag(gAgg

, .. i W @ uus! NA I i "A i stasc setgapCS 13

. ...

, m to i o i o Gu,u,,@r= ,C...,C,@ Na i

' ' '

..c. .'u'..w3 o 'a mussete O t1C2tPTIC88

>

i is ae 10 1010 l@lu ii NA

.-e n nnA l LC13 08 CA Caesact 70 sacL37Y Wet 381CAerMCm l l 4 '/ U U 't a

'

i S b@l NA j

' b,'"i'7C ,,,,c,, @ 7 910170 oly[ aac t:ss catv

"

>

o

..

@l i.

NA I IIilIliIiffI l

.. .. ..

m4us ca enspans, R. D. Tawis , cus: (704T 373-8285

_

_