05000255/LER-1978-033-01, /01T-0:on 781025,during 15-day Isolation of Waste Gas Decay Tank,Part of Tank Contents Leaked Out.Caused by Faulty Pressure Instrumentation.Instrumentation Recalibr

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/01T-0:on 781025,during 15-day Isolation of Waste Gas Decay Tank,Part of Tank Contents Leaked Out.Caused by Faulty Pressure Instrumentation.Instrumentation Recalibr
ML19208B818
Person / Time
Site: Palisades 
Issue date: 11/03/1978
From:
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19208B784 List:
References
RTR-REGGD-01.016, RTR-REGGD-1.016 LER-78-033-01T, LER-78-33-1T, NUDOCS 7909210457
Download: ML19208B818 (1)
v • d • e


LER-1978-033, /01T-0:on 781025,during 15-day Isolation of Waste Gas Decay Tank,Part of Tank Contents Leaked Out.Caused by Faulty Pressure Instrumentation.Instrumentation Recalibr
Event date:
Report date:
2551978033R01 - NRC Website
v • d • e

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PALISADES LC,[""3" u.s.NuctEAa aEcWLAToRY COMutssicN LICENSEE EVENT REPORT CoNTactabociel l

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EVENT DESCRirTioN ANO emosasLE CONSEQUENCES io ITTT1l During the period 9-26-78 to 1 s-10-78, vaste gas decay tank T-683 was g, isolated to acec=plish a 15-day holdup of its contents as required by I TS 3.9.17.

During that period, 2.06 Sa :u:S of the tanks contents leaked o

, out, and vere released v/o being heldup for the required 15-day decay c

i ITT3l I veriod.

Total activity released was 0.0135 curies, with Xe-133 being the,

oer i predc=inant nuclide. Refer to LER 77-023 for si=ilar occurrence.

Event I

W o no adverse effect en public~ health or safety.

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o CAUSE CESCRIPT1oN ANo CORRECTIVE ACTIONS 27 I

o I Leakare path is postulated to have been through the tank relief valve.

gi During filling of the tank, it was pressurized to approx 119 psis, due mI to faulty pressure instru=entation.

It is believed the elevated pressure,

S yI caused leakage through the relief valve which no:: ally lifts at 130 psig.,

The instru=entation has been recalibrated.

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