05000317/LER-1979-006-03, /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

/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: 05000317/LER-1979-006, Forwards LER 79-006/03L-0 05000317/LER-1979-006-03, /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
References
LER-79-006-03L-01, LER-79-6-3L-1, NUDOCS 7903290110
Download: ML19263D372 (1)

LER-1979-006, /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

Event date:
Report date:
3171979006R03 - NRC Website

text

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

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LICENSEE EVENT REPORT t

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60 61 OOCKET NUM8g m 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT OESCRIPTION AND PROBABLE CONSEQUENCES h o

2 i At 0345 while performino routine surveillance testino, unidentified Reactor 1

l Coolant System (RCS) leakage was determined to be 1.8 gom (T.S. 3.4.6.2).

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3 lo 14 l l The reactor was placed in mode 2 at 0717 to facilitate locating the source I

l of the leakage. The leak was determined to be a leaking leak off plua on I

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lCVC-515-CV. The leak was repaired and unidentified RCS leakane was reduced l

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l to less than 1 gpm at 1345. This is not a repetitive occurrence.

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33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i

o IExcessive leakane was caused by the natural end of life of the valve nackinn.

TI he packino was adjusted and the leakoff line canned to reduce the leakane, j

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lThis valve is scheduled for repair and modification durino the next outane.

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7 8 9 to GS 69 83 5 NAME OF PREPARER S. M. Davis /K. M. Ronney

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