ML20086L536

Telecopy AO 74-11:on 740318,main Steam Line Drain Valve MO-2-77 Failed to Close.Cause Unknown.Corrective Action to Be Determined Following Investigation

ML20086L536
Person / Time
Site:	Peach Bottom
Issue date:	03/19/1974
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086L524	List: ML20086L519 ML20086L526 ML20086L527 ML20086L536 ML20086L538 ML20086L543
References
AO-74-11, NUDOCS 8402080297
Download: ML20086L536 (1)

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Kr. Jtecc. P. O'LAly, Direct or

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.I United F,totec Ato .ie T.:sercy Co: ,itrion > ,

Directorate of I:ep3atory Operntionc

!  ! 631 Pnrh Aver.ue .

i .' Uing c'f Prur: cit., Pennsylvania 194% s Pabhet: Abnorr :1 Decu-rence 2ff-Ecur Motifiention l Confirr.ing Mr. Ticicehrann's convertation with Mr. D. Caphton, A. L C.

Region 1 Sopintory Operatior.c Office on March 19, 1974.

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Eeference: Liceme Humber ITT: 44, A endrent Hucber 1

. Technien) Specification Table 3 7.4 .

}  ? Report No.: 50-277-74-D j

Report Ibte: lbrch 19, 1974

. Occurrence Ibte: March 18, ,y@ '

Tacility: Peach Bottcc Ato..ie Power Station - Unit 2 ~

j R. D. Is Delta. Pennsylvnnia 17314 j  ; -

identification of Occurrence .

Tonovinc c Group I sco)ation enuced by instrur.ent curveillance 3; tehtJng, il vac deierr.ined that the r.ain cteam line drain valve

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i j ID-2-77 failcd to cloce,

-' I Conditionn Prior to Occurrence:

j P)nnt otnble at- approxir.stely 4b', power.

1 Deceription of Occurrente:

Y j DarinC drstrurent curveine.nce tocting a Group 1 icolation was

] initir.ted due to volving en incirurent into cervice, thin ctenn

,j 33ne drair. valve MJ-2-?? foi' icd to cfor.e no required by Group I t ico).ntion.

O:. il

'i Dccipation of Apy; rect Ceurm of Occurrcnce:

] Thic velve ir. t.utow,tically c)ored during Group I icolation by

l de-coerC i rinC reley 34.-H57 to cloro connector 3 4 The valve j

,1 vnc tec.ted reverid tis.er.on the foD oving dcy, during which correct cloture occurrcd ein:i. time. No apparent enuce hso .

,; yet bctn identified.

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, Analytin of Occurrence:

i  :; 7 hic valve. MD-P-77, in in serice with another icolation valve a 9 10-2-74, which did close correctly na n recult of the irolation.

'. Beccuce the lir.e var iro3nted, there vns no cafety.icplication.

1 :1 i; . Corrective Action' if  ; she o:currence is ctill under invectigation.

!! l l .? ] ThDure Data:

No previous.

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ll .  ;. L U. , UDrich, Superint er. der.t -

Peach lbitcc Atccie Pcver Str. tion

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1 8402080297 740321 O PDR ADOCK 05000277

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