ML17266A204

RO 335-80-25:on 800512,during Planned Secondary Plant Cooldown/Depressurization for Turbine Steam Seal Repair, Main Steam Header Would Not Depressurize Following MSIV Closure.Apparently Caused by Mispositioned Valve

ML17266A204
Person / Time
Site:	Saint Lucie
Issue date:	05/12/1980
From:	Wethy C FLORIDA POWER & LIGHT CO.
To:
References
982, NUDOCS 8005230377
Download: ML17266A204 (1)

Text

cac c

~ c'

~ ~ I ~

~

~ ~ ~ ~ ~

~ ~ Ccccvc 0

~

~

~ ~, ~

~

~

~

r c

~

Q))~-PSX Ltr. ))L. 4982 Copies tie:

Q)U, J))B, CA)l, 0.VZ, lou

"; I If'i ct f-r tr>>

c c

c Dfxsitc'I)S JH)3, CG)l, K.'iH,.fAS, H).sU

"'!0'( l2 F'tci'.iT t rc" (ct ic i =c>lii t

~ '>>

ltay 1'c, 1940 TO:

Hr. J. P. O'Rail]y, Dirt.'.ctor, Hts".ion II Offico af Inspect:ion'and Eilri>lc'lt U

S (uclear Hepulat:ory Ccit

~ i ssion

Atlanta, GA 30303 I:RG.'l: lfr. C. lf. Verity, Plant. l)attester St. Lucia P 1 a tat DP)t

- 67 Plorida Potser 6 Li')TL Co--pany a

l.limni, 1I I

c

- )h CLKRK.

SUBJECT:

c ll)"l0 FQ)), PACSL)ILK THY'l)ISSIO;) '1'0 CAl)PI)Qf PHA!)PY )ti PARTAi3) l,"

nCC))R))3".)CE 335-80-25 I:)OPERA))LE tlslV )3'CPAQQ VALVE" I"e uo is to confirm e)te telepltotla Ttotificntic'n

.a'la vu rli ~.tHC

, doJicatod pllonc circuit a't 0343 an 5/12/80.

During a planneJ secondary plaiit.'coisl Juwtt/de)iresstirization rar riir >

n.".

stcam seal rcPair, it was noted t')tat: t:ht tciain stoa< )ieader 4s.:<<l.

iin 3 dcprossuriao follotsing.t)SIV c1oaure.

Ar. a1".nut 3:15 P~tf on 5/l2s/80 investi~arion revealed that )sot)i:)SIV bypass valves were stucL itT tlirt

'open'asiri.an.

The st-.z nl liarli valves --crc sheared and r)ic v.ilveo worn inoperable borh electrically nnJ...atlltal,ly t;lect:rical val z position inJicaticn in tho conrrcil r~".c."~ liaJ s)ti: nt otic valve to )ici 'siitit.'.

The ot:her was t:apped closed wir)tour. posi.t:inn indicaricn.

Since t)tc bypaa" valve is an int: gral. parr. oi i,ts rcspcctivc !)SIU, t'e plant was not in full cct=pliancc stir)i 'Recit

$pec'

~ 7 l 5 ()fSIV Qpershilikj)

~

It shnuld he notad t)tat t'hese are 3 lite)i ~sara iip.lines Ancl "ltattld Faigitificartt-saf ty i~ffilets ~

1 larit s)ititdci'sn't'LQ cc oMc:st tsns

<:cs-.=oner-'t ar. 3:43 A)f this date.

Xt appears that one valve was vis-'positioned dttring ttairttenancc ctiter secondary syst:en uart tip on 5/10/80 aiid t:li. s)taft shoarcd an thc at):ar when ir, was aporatccl fnz thc secondary sy t:ta;.t;sar.".;.tift.

An intsestightion is in progr~ss t:o dcaterciine the-asset cause of E)to rialfunction and final reiiu1ts including final carrecriva act:ion tsil.l )ic report:ed.

I'.

H. )ht)ty, Plant Taper St. Lucie l'1ant goo>

5.

QN/HRJ/cc c