ML20086H074
| ML20086H074 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 10/24/1975 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| AO-75-69, NUDOCS 8401130389 | |
| Download: ML20086H074 (1) | |
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PHILADELPHIA ELECTRIC CO.MPANY i
Peach Bottom Atemic Power Station l
Delta, Pennsylvania October 29, 1975 (r. James P. O'Reilly, Director n
Office of Inspection and Enforcement w
i Region 1 Jnited States Nuclear Regulatory Commission i
531 Park Avenue
-t
'ing of Prussia, Pennsylvania 19406
Subject:
Abnormal Occurrence 24-Hour Notiftention
]
s Confirming.R. S. Fleischmann's phone conversation with Mr. Walt Baunack, i
Region 1, United States Nuclear Regulatory Commission on October 24, 1975 J
8eference:
License Number DPR-56 I
Technical Specification -
Reference:
4.7.A.2.f g
aeport no.:
50-278-75-69
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3eport Date:
October 2#, 1975 Occurrence Date:
October 23, 1975 Facility:
Peach Botton Atomic Power Station R.D. 1, Delta, Pennsylvania 1731'4 j
i Identification cf Occurrence 0-ring gasket leak on Drywell Purge Supply Valve AO-3505 I
i Conditions Prior to Occurrence:
Reactor power 575.
Description of Occurrence:
I:
s While preparing for a local leak rate test on the inboard flange of the Drywell Purge Supply Outer Isolation Valve, containment atmosphere was found to leak out.
The inner 0-ring leaks.
Designation of Apparent Cause of Occurrence:
Under investigation.
l Analysis of Occurrence:
The other isolation valves associated with this penetration were closed i
at the time of the occurrence.
A local leak test of all those.
isolation valves and the outer 0-ring done on 10/15/75 showed them to be leak tight.
Safety
- implications are therefore minimal.
- ~
Corrective Action:
To be determined after investigation.
Failure Data:
Abnormal Occurrence Report Numbers 50-277-75-68 and 50-277-75-69 Ver truly yours,
- 4. T. UE rich, Superintendent i
Peach Bottom Atomic Power Station
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B401130309 751024 I
j PDR ADOCK 05000278 i
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PDR m.
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