ML19263D372

LER 79-006/03L-0 on 790304:reactor Coolant Sys Leakoff Plug CVC-515-CV Was Leaking.Caused by Natural End Life of Valve Packing.Packing Adjusted & Leakoff Line Capped

ML19263D372
Person / Time
Site:	Calvert Cliffs
Issue date:	03/22/1979
From:	Davis S, Romney K BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19263D371	List: ML19263D370 ML19263D372
References
LER-79-006-03L-01, LER-79-6-3L-1, NUDOCS 7903290110
Download: ML19263D372 (1)

Text

NRC F OHM 3G6 U. S. NUCLEAR HEGULATORY COMMIS$10N (7 77)," p ^

t < LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l l (PLEASE PRINT OR TYPE ALL REQUIREO INFORMATION) i 6 7

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7 8 69 75 REPORT DATE 80 EVENT OESCRIPTION AND PROBABLE CONSEQUENCES h o 2 i At 0345 while performino routine surveillance testino, unidentified Reactor 1 o 3 l Coolant System (RCS) leakage was determined to be 1.8 gom (T.S. 3.4.6.2). -

I lo 14 l l The reactor was placed in mode 2 at 0717 to facilitate locating the source I o s l of the leakage. The leak was determined to be a leaking leak off plua on I o 6 lCVC-515-CV. The leak was repaired and unidentified RCS leakane was reduced l o 7 l to less than 1 gpm at 1345. This is not a repetitive occurrence. I o a i I

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18 19 SEQUENTIAL OCCURRENCE REPORT REVISION L EVENT YEAR R EPORT NO. CODE TYPE NO.

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40 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i o IExcessive leakane was caused by the natural end of life of the valve nackinn.

i i I The packino was adjusted and the leakoff line canned to reduce the leakane, j i 2 lThis valve is scheduled for repair and modification durino the next outane. I i 3 l l t 4 1 7 8 9 80 ST  % POWER OTHER S*. ATUS 015 O RY OiSCOVERY CESCRIPTION i s NA Operator observation l E l@ l' 1l 0[ 0[@l" "

l lB l@l l A!TiviTv CO0 TENT REL ASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE i 6 lZ[g NA l l NA l PERSONNEL EXPOS ES NuesER TvPe oESCRiPTiON @

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7 8 9 to GS 69 83 5 NAME OF PREPARER S. M. Davis /K. M. Ronney pgayg @) N7MN {