ML20086J188
| 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: |
| References | |
| AO-74-29, NUDOCS 8401230289 | |
| Download: ML20086J188 (1) | |
Text
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N Feach Botton Accuic Psw:r Statien g 4,p
/3/9u.NAC./;"l Delta, Pennsylvania 17314 November 25, 1974 Mr. James P. O'Reilly, Director
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g*, o g U0itcd States Atomic Energy Colmaission T'
Dirsctorate of Regulatory Operations i t k 'L** N
^631 Pcrk Avenue
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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 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 D30ignation of Apparent Cause or;o the reactor and prove operability.
nanually to inject water int 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 Vcry truly yours,
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W. T. Ullrich, Superintendent Pasch Bottom Atomic Power Station i
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