ML20126B423

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Ro:On 800305,during Automatic Switching of Emergency Power Sources,Emergency 480 Volts Power Source Did Not Recover. Cause Under Investigation.Breaker E-334 Manually Closed
ML20126B423
Person / Time
Site: Peach Bottom 
Issue date: 03/05/1980
From: Ullrich W
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
References
NUDOCS 8003120526
Download: ML20126B423 (2)


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_R_EPORTABLE OCCL*RRETICE "FDMPT fvD..T._I,F.7.C_AT.IO.N Confir tng 4. S. Tleinch.cnnn'a FMne c.Onver-nti en to Mr. Crva i ll.

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Unit.3 Techr.3 c-2 ?peciff.catien 6.0.2( 5) ~~ 1

? - r e:". ve.:

3-90-6/1F Cetu:rence Date:

3,' F B 0 Ileut t ricatien of Occurrance:

hiltsre of sn emarcanny '400V pewar source.

Con:11 t,ienn ~ Prioi to Occurrence:

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Doct: 1pt.J on of Occurr-rme :

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Dorina - r*.e ma t i e av ' t< P.! n t-o' amarua"cy r'r'ae e'" r-e a e. t ' - F-1,b htYv 1 't 1 c e ! *, a " vap ".it.*^ t t '; e l l y a be*3 I. ' '?' I " F. " " ' '. C ' ' i n F. I "i

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mest.t evilly race e-r an requf rad t y la=15m.

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t ub. r i n v a n t i a n ', li eri.

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.T Occut renere :

Pa!1u'

F F.3'h b--akar *e =W.nmatl'n1ty racione pr-v nts a u ton.es t l e

'A' cer-spray eyete n

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  • B' rrea.mpray

=.n d 'D' LrCI my=ta== vara operable.

n:-33h bre rther was manua l l y r.parabl e frcm t he etint resi r tmm.

Tha b r reik ar wa s q

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open approximately two minuten during wtitch time tiar c?perator c,mpleted ro m e t, or rihs.

Had a rull actu ocewrc.i prie,r Lv r.- 3 '31 brauxer civ wo.

lea d i at.e al.ernt..,e actiori vou.l.1 Le th ve ri fy in:3 apuro,Lian ir requirod and E-33L Lt mar would have been limu4414tely cloac.1. ' Lo a n o r p.u c r t.c A ucre pr.y w.4. 'rendily apparent l're A the 1.dacx. of valve i...li aAY". an i f hty.

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m' Cor ree t t vt Act i e,n :

The operat.or u.anually closed E-331. branLer when he noticud ' A' core e t,ruy power fallare.

t.'u.'E was not require.l.

Iriv % t.f eut ian of the out..m.u.ic raelcoure f.illure is cont inuing.

Failure Data:

Previous occurrence Deceaster 20,1917, f.t:H 3 62/IP.

Very truly s uura,.

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