ML20086H575
| ML20086H575 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 09/12/1975 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Boyd R Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20086H578 | List: |
| References | |
| AO-75-55, NUDOCS 8401180032 | |
| Download: ML20086H575 (2) | |
Text
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September 12, 1975 YTrs:'
Mr. Roger S. Boyd, Acting Director Division of Reactor Licensing Office of Nuclear Reactor Regulations United States Nuclear Regulatory Commission Wa shi ng ton, D.C.
20555
Dear Mr. Boyd:
Subject:
Abnormal Occurrence The following occurrence was reported to Mr. Walt Baunack, Region 1, Office of Inspection and Enforcement, United States Nuclear Regulatory Commission on September 3,1975. Wri tten noti fication was made to Mr. James P. 08Reilly, Office of Inspection and Enforcement, Region 1, United States Nuclear Regulatory Coninission on September 3, 1975.
In accordance wi th Section 6.7 2.A of the Technical Specifica-tions, Appendix A of DPR-56 for Unit 3 Peach Bottom Atomic Power S ta ti on, the following report is being submitted to ths Directorate of Reactor Licensing as an Abnormal Occurrence.
Reference:
License Number DPR-56 Technical Specification
Reference:
3.7,0.1 Report No.:
50-278-75-55 Report Date:
September 12, 1975 Occurrence Date:
September 2, 1975 Faci li ty:
Peach Bottom Atomic Power Station R.D. #1, Del ta, Pennsylvania 17314 Identification of Occurrence:
The drywell floor drain inboard isolation valve, A0-3-20-82, failed to close during surveiilance testing.
Conditions Prior to Occurrence:
Hot standby.
Description of Occurrence:
During the performance of a surveillance test, A0-3-20-82 failed to close when given an isolation signal,
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50-278-75-55 September *12, 1975 Page 2
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Designation of Apparent Cause of Occurrence:
A defective seat of a solenoid valve prevented proper operation of A0-3-20-82.
Analysis of Occurrence:
The safety ' implications of this failure are mininal because the outboard isolation valve did close from the isolation signal.
Corrective Action:
ihe solenoid valve was replaced and A0-3-20-82 was tested satisfactorily.
Failure Data Ac-50-278-74-26 and A0-50-277-74-7 Very truly yours, t
t M.
. Cooney A st. Geni. Supt.
Generation Division cc: Mr. James P. O'Reilly, Di rector, Region 1 Office of Inspection and Enforcement i
Uni ted States Nucicar Regulatory Commission 631 Park Avenue King of Prussia, PA 19046 I
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