ML20151C181
| ML20151C181 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 09/28/1973 |
| From: | JERSEY CENTRAL POWER & LIGHT CO. |
| To: | |
| References | |
| AO-73-24, NUDOCS 8103040939 | |
| Download: ML20151C181 (2) | |
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Rcport No. 73-24 t.
SUPJrcr:
Violation of the Technical Specifications, p.$rograph 1',15,B, failure of M. sin stenn Isoistion' valves NSO4A and NSO4B to neet acceptsble Icaknge as ipecified in Teclinical Specification
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' 4.5.F.1.D.
This event is considered to be an abnomal occurrence sis de-fined in the Technien1 Specifications, paragraph l'.'15.E.
Noti-fication of this event is required by the Technical. Specifications, patograph 6,6,2.a, was nade to AEC Region 1, Directorate of Regulatory Operations, on Friday, Septerher 28, 1975, at 3:50 p.m.,
and by teh oopior on Friday, Septe:Jher 28, 1973, at 5:00 p.m.
SITUATION: At.1801 on Septerber 27, 1973, Pain Stean Isolation Valve NSO4B was tested for leskage and the Ieskage was ceasured to be approxicately 15.15 SCFil.
At 2035 on Septecher 27,1973,.Hain $ teen Isolation Valve NSO4A was tested for Icakage and the Icakage was neasured to be approxinately
[
96,59 SCFH.
150th valves, NSO4A and N5048, were operated following the rvsetor l
shutdonp and prior to being checked for Icakage. Operation of the valves during the f.hutdown was required to allow odequate THIS DOCUMENT CONTAINS P00R QUAUTY PAGES
l' i
H ventilation {' the reactor vessel, through
main etcam Jines, shile perfonaing maintenance on NS03B, in order to minimize radiogas concentrations in the dryve11.
i Leaksge psf.t the valve packing was detected on both NSO4A and.
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N504B which contributed substantially to the Icak rate. -Repairs to the packing and a rotest of the volvee. {s required to deter-mine whether any other cause contributed to the excessive valve leakage.
RD'EDI AL ACi'70#:
To be deternined.
SAFETY yIMIFIC).NCE:
To be submitted following evA7ustion, i
l Prepared by:
AW, Date:
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