ML20010E814

LER 81-124/03L-0:on 810725 & 0726,two Steam Generators 1B & 1C Feedwater Containment Isolation Valves Declared Inoperable.Caused by Loss of Pressure Due to Small Nitrogen Leaks Around Fittings.Valves Modified

ML20010E814
Person / Time
Site:	McGuire
Issue date:	08/24/1981
From:	Nardoci P DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010E812	List: ML20010E811 ML20010E814
References
LER-81-124-03L, LER-81-124-3L, NUDOCS 8109080283
Download: ML20010E814 (1)

Text

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,,,, , were declared inoperable (one on 7/25/81, another on 7/26/81) _

io..,I pair nitrogen leaks from the tanks and va hes, and recharge the nitrogen accum-I

,,,,,y ulators. This violates T.S. 3.6.3. which is reportable per T.S. 6.9.1.13(b)

I io,,il and is similar to previou's R.O. #369/81-54. Since the valves were closed in  !

,,,,,g order to maintain containment integrity before work on~them was begun, the I

,2,,, I health and safety of the public were not affected. ,

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lieaiIThe N, Accumulators of both valves were losing pressure due to leaks around ther

,, ,,,l fittings which appear to be the result of having been[ tightened too many times.,

ii 7, lThe pressure regulator, associated gauges, and tubing of 4 feedwater system ,

,,,,,; valves were relocated downstream of the external filter mounted on the valve I

, , , operator base plate, and Parker fittings on the N2 Accumulator lines were re-a, ,,placed with socket weld fi n(sg ,, ao s ee en sTArus en.eastarus isc:v en, 3.e=, , ,, ,, ,c,,,,C,,

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mausesemePAREM Phillip B. Nardoci PMCN E:

(704) 373-7432 8109080283 810824 PDR ADOCK 05000369 5 PDR l