ML20126B600

RO 80-14/1P:on 800302,during Diesel Generator 20% Plus Load Test,Emergency Diesel Generator 1 Failed to Synchronize & Tripped While Diesel Generator 2 Was Tagged Out of Svc. Caused by Loose Fuse Holder on Diesel Generator 1

ML20126B600
Person / Time
Site:	Oyster Creek
Issue date:	03/10/1980
From:	Hinrichs G JERSEY CENTRAL POWER & LIGHT CO.
To:
Shared Package
ML20126B598	List: ML20126B596 ML20126B600
References
NUDOCS 8003170328
Download: ML20126B600 (2)

Text

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. port Date: Ha re.li 10, l'!00_, occurrence: 9 : 26 a.m. -2:21.p.m .

OY'.is P. eos t v NUCLEAR GrnrMTING STATION FORKED R PitR. NEW ilER$EY 06/31 Repnetable Occurrence Report Nn. 50-219/BO-14/IP it.N11 F ) r AT I ON Viniation of t he lerbn ical r. pac if ications , pa ragraph 3.7.C. 3, (h.Ciluki tK.E : when both standby diesel generators were DHL of service for airnont fIve hours.

T h i r. ovent i s c ons iderm.) to be a reportehle tv.currence as defined in the Technical Spec t fications, paragraph 6.9.P.a.2.

Thie. was reconnl7ed as a reportable occurrene e at 10:30 a.m. on March 8,1980, following identification of cause. j 1NDIT10h% UPIOR Stcady 5 tate Power Routino Shut.down

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Ho t. stanelby told Shutdown I oad Obarvaas Omrino 7 ' pef,.clino ".hntdewn Roistina P~ce Opera t inn poneinc '. ! a t l u p Other (Speci fy)

Uperatlon Daarfor soberitIran.

Doaa s u r 'm od

• sw i t c h locked in refuel.

Cavity flooded.

'fstRTPTION Un Gunda y , Ma rc h 7. l OHO, a t 0 7fi n .m. , duri a-g surveillance test T GCU!RRrt;CE: (r.v,. 4. cn3) n$,.c.el G+nera tor 20Y. Pl us load 1.st, amaroency diesel ounorator #1 faned to syncronir= and tripo.d. Concurrently, on.orcenry <llosel oepera tnr 77 was t acoswi out of service for mmlif it:a t. lon worit t boi.h diosal conorafors worn inopera bl e , At 10:41 4.m., the reactor mode switch was lort.d in shutdown pusil.lon. An administrativa hold on moving #uel and any work whir.h <nu1d can. a rewinc t. inn nr renr tnr rev 4 ' y *ater lov 'I was put int o e f f,*c t when both d ienc l s were inoper e hl e.

f margency d icsc) generator 17 was raclied in and tested in accordance wi t h U lo s al Canora t or ?O1'. Plu c Load Test. D'asel generator #2 l wa .c. av8ilabic for service a t ?:71 p.m.

After ibo initfal errneren<o o' fbl*. (alluro on March 7. [980, c,fensiso tov .no of F1 d iosal nonera tor was perfarned to da t ormine l

the e i n *, o . The inves t ivat ton int luded conn ~ finn of test instru-l w.n t s. t : n n to t elcot ( f v t he failed c.ompon e n t . The problem, bnwever, we i n t erw i t i en t and was not. Ide n t if led unt 41 Marr.h n, lun0.

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Imrina this period, it was not known whether the malfunction woold affact the fast start capability (emer ency mdo) of the unit. Te<. ting revealed tha t a Irme fuse in the "A" phase potential trane.forrme cirroit to t.be voltaam raculator would a M ect operation or eho unie in a n u ia.,t. . thoe r.nnirik a lir nc . .*v*nt rapnet.

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M,np f n' i , e Unneuai Serv i* e O*n'i l t l on f i.ii.t. llpW fit. I - ~ loc. I nv i r onme n t a l (nealta* inn / ,{ Cunponent 8 e i t urc

~~~ Cens t r ur t. t rin Operator ,,

]Other ( Spac i f ., e Ioto holdor lonse nn f u e,* f 7.

The o,w r.icn r y .14 n e.c I qcocraior s y n 1 <vn a s e, o , c - thera 15 an adaquate

@ Al v r. I '. M f or necra t ion of auu * ; .mn t. requirad for a 3f LURHi M.I. :

?uppl f o f t t a nrf b y powerin maintain the plant la a safo chut<fnwn safe plant *.but.down, r condIt f on and tri operate the requ f red ancineered *afetv Ipature ,

e ys ipnw nt fol lowing an accident. Since with thIt condit$nn occurred the r= actor shut down and dur ino *efuelinq and ma inf.enance. is minimal. Add i t. l onal safaty significanc less than 712"r . . the which stopped fuel mvament and limited ailminl+.tratIve workcontroit on raartor syr,tems further r evluted maintinanro For the a refueling proba-l'ill+y of requiring sa f ety sys t.cres to cpera *ise. required to operate.

Arrident, the t*andby Uns treatment system Terhnical %por i f Ica e ions alinw degraded cmpr:ancy core cooling systems during refe;ctinq.

(J.'upfrT I V E 1)

Dietel acnerafnr f2 modification curta iled unt il problem ACT ION: on diesel concrator #1 was correctad. *

7) Dior.al opnarstor #1 lons, fu<.e holder was repaired.

f AIll!RE i1ATA:

Not. :=ppi((.abta

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' ' Date: v I'repared by: _Qc , ,-4.' n . m na hs', *(r C, 1

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