ML20086J188

Telecopy AO 74-29:on 741125,HPCI Isolated Following Automatic Initiation.Cause Unknown.Corrective Action to Be Determined

ML20086J188
Person / Time
Site:	Peach Bottom
Issue date:	11/25/1974
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086J183	List: ML20086J180 ML20086J187 ML20086J188
References
AO-74-29, NUDOCS 8401230289
Download: ML20086J188 (1)

Text

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• I h1LADEl.PHIAELECTRICCOMP Feach Botton Accuic Psw:r Statien /3/9u.NAC./;"l g 4,p

. . .. Delta, Pennsylvania l 17314 -

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.-......:.... November 25, 1974 - - - -

Mr. James P. O'Reilly, Director .] g*, o g U0itcd States Atomic Energy Colmaission T' '

Dirsctorate of Regulatory Operations ,

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^631 Pcrk Avenue )

King of Prussis, Pennsylvania 19406 Subjact: Abnormal _ Occurrence 24-Hour Notification C= firming W. T. U11 rich's phone conversation with . Hr. Walt Baunack, A.E.C. Region 1 l

Regulatory Operations Office on November 25, 1974.

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Eference: License Number DPR-56

• Technien1 Specification Reference 3.5.C R3part No.: 50-278-74-29 Ccport Date: November 25, 1974 Occurrence Date: November 25, 1974 Facility: Peach Bottom Atomic Power Station R.D.1. Delta. Pennsylvania 17314 Identification of Occurrence:

HPCI isolation following automatic initiation. .

Conditions Prior to Occurrence:

Unit 3 reactor isolated and scrassmed as part of a startup test program.

DOccription of Occurrence:

During the review of data taken during the 100% reactor isolation test performed on 11/19/74, it was noted that the HPCI had received an initiation signal during the transient. The HPCI then icnediately isolated. The HPCI was then reset and operated nanually to inject water int D30ignation of Apparent Cause or;o the reactor and prove operability.

Occurrence:

A review of the test data and interviews with the operators present during the transient has not provided an absolute cause.

Analysis of Occurrence:

During this transient, the reactor water level momentarily dropped to the initiation level for EPCI and RCIC. Reactor water level was immediately recovered by way of the r: actor feedpump. HPCI operation was not required during this trancient. All other engineered safeguard systems operated as expected. This occurrence has minimal safety implications. .

Corrcetive Action:

In an attempt to further investigata and determine the exact cause of this occurrence o EPCI quick start with a condensate storage tank to condensate storage tank flow path is scheduled for 11/26/74. A vessel injection test will be repeated prior to completion of a 100% testing program to further ensure EPCI operability.

Foilure Data: .'

None. 8401230289 741205 -

PDR ADOCK 05000278 .

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Vcry truly yours, l

l fWhWY W. T. Ullrich, Superintendent * *'

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Pasch Bottom Atomic Power Station ,

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