ML20086H144
| ML20086H144 | |
| 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 | |
| ML20086H147 | List: |
| References | |
| AO-75-56, NUDOCS 8401130454 | |
| Download: ML20086H144 (2) | |
Text
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September 12, 1975
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Mr. Roger S. Boyd Acting Director Division of Reactor Licensing Of fice of Nacicar Reactor Regulations United States Nuclear Regulatory Commission Washington, DC 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. Written notification was made to Mr. J. P. O'Reilly, Region 1, Office of Inspection and Enforcement,. United States Nuclear Regulatory Commission on September 3, 1975 In accordance with Section o.7 2. A of the Teci,nical Speci-fications, Appendix A of DPR-56 for Unit 3 Peacn Bottom Atomic Power Station, the following report is being submitted to the Directorate of Reactor Licensinj as an Abnormal Occurrence.
Report No.:
50-278-75-56 Report Date:
September 12, 1975 Occurrence Date:
September 2, 1975 Facility:
Peach Bottom Atomic Power Station R.D. 1, Delta, Pennsylvania 17314 Identification of Occurrence:
Failure of torus instrument nitrogen isolation valve, A0-3968, to close during surveillance testing.
Conditions Prior to Occurrence:
Hot standby.
Description of Occurrence:
During the performance of a surveillance test, A0-3968 f ailed to close when given.an isolation signal.
So dl Designation of Apparent Cause of Occurrence:
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. The-solenoid valve which actuates A0-3968 f ailed to operate correctly because of a defective valve seat.
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8401130454 750912 PDR ADOCK 05000278 r)cr)d--
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Mr. Reger S. Boyd September 12, 1975 Page 2 Analysis of Occurrence:
The safety implications of this occurrence are minimal because there are check valves inside and outside the torus penetration that would prevent leakage in the event of a piping failure.
Correcti ve Action:
The f aulty solenoid valve was replaced and A0-3968 was stroked satisfactorily.
Feilure Data:
None previous.
Very truly yours, I
7 M.
Cooney A
't Gen'l Superintendent Generation Division cc:
Mr. J. P. O'Reilly Director, Region 1 Office of Inspection and Enforcement United States Nuclear Regulatory Commission i
631 Park Avenue 4
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King of Prussia, PA 19406
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