ML20086F938
| ML20086F938 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 10/31/1975 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Boyd R Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20086F942 | List: |
| References | |
| AO-75-68, NUDOCS 8401090694 | |
| Download: ML20086F938 (2) | |
Text
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PHI DELPHIA ELECTRIC COMPANY 2301 MARKET STREET PHILADEi PHIA. PA.19101 7 w~.,
12151 841-40o0
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October 31, 197 J c
NOV5 1975 <--
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Mr. Roger S. Boyd'
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Acting Director y
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Division of Reactor Licensing W
Office of Nuclear Reactor Regulations D
United States Nuclear Regulatory Comission Washington, DC 20555
Dear Mr. Boyd:
gFILE COPY
Subject:
Abnormel Occurrence The following occurrence was reported to Mr. Walt Baunack, Region 1, Of fice of Inspection and Enforcement, United States Nuclear Regulatory Commission on October 21, 1975 Written notification was made to Mr. James P. O'Rei11y, Region 1, Office of Inspection and Enforcerrent, United States Nuclear Regulatory Comission on October 21, 1975 In accordance with Section 6 7.2.A of the Technical Specifications, Appendix A of DPR-44 for Unit 2 Peach Bottom Atomic Power Station the following report is being submitted to the Directorate of Reactor Licensing as an Abnormal Occurrence.
Reference:
License Number I)PR-44 Technical Specification
Reference:
4 7.A.2.f Report No.:
50-277-75-68 Report Date:
October 31, 1975 Occurrence Date:
October 21, 1975 F aci li ty:
Peach Bottom Atomic Power Station R.D. 1, Delta, Pennsylvania 17314 Identification of Occurrence:
0-ring gasket (incorrectly reported as A0-2521A on the 24-hour Report). leak on Torus Purge Supply V
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Conditions Prior to Occurrence:
8401090694 751031 Reactor power 56%.
DR ADOCK 05000277 s
/y Description of Occurrence:
COPY SENT REGION / N While preparing for a local leak rate test on the outboard flange of the torus purge inboard isolatien valve, containment atmosphere was found to leak out of the test connection.
It was suspected and reported that the inner 0-ring leaked.
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M'. Roger S. Boyd 0-277-75-69 0 & ber 31, 1975 g
Page 2 Designation of Apparent Cause of Occurrence:
During the investigation, it was determined that the connection that was used to do the test was not the connection for testing the double 0-ring seal.
Instead, it comunicated directly with the drywell and Torus Inerting Supply Line outboard of the inner isolation valve.
Analysis of Occurrence:
The other isolation valves associated with this penetration were closed at the time of the occurrence.
Safety implications are therefore minimal.
Corrective Action:
The connection was capped and leak checked successfully. The 0-ring seals will be tested in the near future.
Failure Data:
i None.
Very truly yours, M
J. Coone perinten ent eneration Division - Nuclear cc:
Mr. J. P. O'Reilly Director, Region 1 Office of Inspection and Enforcement United States Nuclear Regulatory Conmission 631 Park Avenue King of Prussia, PA 19406
.