ML20126B423

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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!ir, ?"yc= H. 0-tar Orrtee of Inrpec+.Icn and Enferca'nent .

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_R_EPORTABLE OCCL*RRETICE - "FDMPT fvD..T._I,F.7.C_AT.IO.N Confir tng i 4. S. Tleinch.cnnn'a FMne c.Onver-nti en to Mr. Crva i ll . l Pact"n 1. United State'1 *1ucleer Een:t:1e',ory Cc'teaf reicn en 3/5 /80. i l

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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: ~

a. Uetit 3 at J OO5 pover ,

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Doct: 1pt.J on of Occurr-rme : /

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 'I ' 'I "'7 t 9 M I f> -

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

E".f.I GT3t I en of ,Ayp3 reg.t_,C,1,ymAM.", c.3r,r;nec :

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

(f .n : ., Ie .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 'c+ f"n. .. *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 I ro m e t, or rihs. Had a rull actu ocewrc.i prie,r Lv r.- 3 '31 brauxer civ wo. I 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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, , e 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:

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

Very truly s uura , .

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W. T. U21rien S t.at ic4. 0,uperintendent WWilja P

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