05000317/LER-1981-050-03, /03L-0:on 810613,RCS Gross Leakage Was Found to Be 16 Gpm.Caused by Natural End of Life of Root Valve Packing.Leakoff Line Capped,Reducing Leakage.Valve Will Be Repaired During Next Outage

/03L-0:on 810613,RCS Gross Leakage Was Found to Be 16 Gpm.Caused by Natural End of Life of Root Valve Packing.Leakoff Line Capped,Reducing Leakage.Valve Will Be Repaired During Next Outage

ML20009D526
Person / Time
Site:	Calvert Cliffs
Issue date:	07/13/1981
From:	Rayburn C, Wenderlich R BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20009D519	List: 05000317/LER-1981-050, Forwards LER 81-050/03L-0 05000317/LER-1981-050-03, /03L-0:on 810613,RCS Gross Leakage Was Found to Be 16 Gpm.Caused by Natural End of Life of Root Valve Packing.Leakoff Line Capped,Reducing Leakage.Valve Will Be Repaired During Next Outage
References
LER-81-050-03L, LER-81-50-3L, NUDOCS 8107240144
Download: ML20009D526 (1)

LER-1981-050, /03L-0:on 810613,RCS Gross Leakage Was Found to Be 16 Gpm.Caused by Natural End of Life of Root Valve Packing.Leakoff Line Capped,Reducing Leakage.Valve Will Be Repaired During Next Outage

Event date:
Report date:
3171981050R03 - NRC Website

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NRC FORM 366 U. S. MUCLEAR REGULATORY COMMISSION 0M=

LICENSEE EVENT REPORT CONTROL BLOCK: l l

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60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h lo l2l l During normal power operation RCS gross leakage was detennined to be 16 l

g o i3i i gpm (T.S. 3.4.6.2) at 2145. The reactor was shutdown by 0140 on 6-14-81.

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The source of the leakage was found to be the root valve for PDT-122A.

I gois,i The leak was re paired and leak rate returned to specificatien at 1100 on l

l o 16 l l 6-14-81. Similar events-50-318/77-76 and 50-318/77-60.

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40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o l Excessive leakaae was caused by the natural end of life of the mot I

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valve packina. The leakaae was reduced by the canning of the laaknff I

i 2 l line. This valve,1-RC-189, is scheduled for repair durina the next I

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outage.

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