ML20086F944

Telecopy AO 75-68:on 751021,leak Found on O-ring Gasket on Torus Purge Supply Valve AO 2521A.Cause Under Investigation. Corrective Action to Be Determined After Investigation

ML20086F944
Person / Time
Site:	Peach Bottom
Issue date:	10/21/1975
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086F942	List: ML20086F938 ML20086F944
References
AO-75-68, NUDOCS 8401090712
Download: ML20086F944 (1)

Text

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• PHILADELPHIA ELECTRIC COMPANY /

• . Peach Hottom Atonic Power Station j - Delta. Pennsylvania' 17314 October 21, 1975 Mr. James P. O'Reilly. Director office of Inspection and Enforcement ,

,;[h-Region 1

, United States Euclear Regulatory Commission [gg 631 Park Avenue

, Eing of Prussia, Pennsylvania 19k06 -

Subject:

Abnormal Occurrence 2L-Hour T(oti fi c at ion Confirming R. S. Fleischmann's phone convercation with Mr. Walt Baunack Region 1. United States Nuclear Regulatory Commission on October 21, 1975

Reference:

License Number DPR kk Technical Specification

Reference:

k.T.A.2.f

'- Report No.:

• 50-277-75-68

, Report Date: October 21, 1975 Occurrence Date: October 21, 1975-

l. Facility: Peach Botton Atomic Power Station

• R.D. l ', Delta. Pennsylvania 17314 i Identification of occurrence:

0-Rin'g gasket leak on Torus Purge Supply Valve AO-2521A.

Conditions Prior to Occurrence: - - -

i Reactor power 56%. -

• 1 Description of Occurrence:

. While preparing for a local leak rate test on the outboard finnge

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, was of the foundtorus purge to leak inboard isolation valve. (containment atmosphere out.

The inboafd 0-ring leaks.

.k Designation of Apparent Cause of Occurrence:

. T, ~ ~ 1' Under investigation.

y Analysis of Occurrence:

- Both time and the inboard both were. andverified outboard to beisolation leak tight. valves were closed at the

' Because the isolation f

valves wereisleak significance tight and the outer 0-ring is leak tight, safety minimal.-

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. Corrective Action: ,

, To be determined after investigation.

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Failure Data:

g None.

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Very truly yours.

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' /WF N W. T. Ullrich. Superintendent

t. Peach Botton Atomic Power Station l (Jvs) l

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' 0401070712 751031 ' -

j PDR ADOCK 05000277 ~ '

S PDR ' -

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