05000395/LER-1982-019-03, /03L-0:on 821010,during Initial Startup in Mode 3, Pressurizer PORV Block Valve Mvg 8000C in RCS Found Leaking in Open Position.Caused by Worn Valve Packing.Packing Replaced.Valve Tested & Returned to Operable Status

/03L-0:on 821010,during Initial Startup in Mode 3, Pressurizer PORV Block Valve Mvg 8000C in RCS Found Leaking in Open Position.Caused by Worn Valve Packing.Packing Replaced.Valve Tested & Returned to Operable Status

ML20028A559
Person / Time
Site:	Summer
Issue date:	11/08/1982
From:	Fields H SOUTH CAROLINA ELECTRIC & GAS CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20028A557	List: 05000395/LER-1982-019, Forwards LER 82-019/03L-0.Detailed Event Analysis Encl 05000395/LER-1982-019-03, /03L-0:on 821010,during Initial Startup in Mode 3, Pressurizer PORV Block Valve Mvg 8000C in RCS Found Leaking in Open Position.Caused by Worn Valve Packing.Packing Replaced.Valve Tested & Returned to Operable Status
References
LER-82-019-03L, LER-82-19-3L, NUDOCS 8211220289
Download: ML20028A559 (1)

LER-1982-019, /03L-0:on 821010,during Initial Startup in Mode 3, Pressurizer PORV Block Valve Mvg 8000C in RCS Found Leaking in Open Position.Caused by Worn Valve Packing.Packing Replaced.Valve Tested & Returned to Operable Status

Event date:
Report date:
3951982019R03 - NRC Website

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o2 lon October 10. 1982. with the Plant in Mode 3 during initial start-up, a l

lo l3 l l Pressurizer PORV block valve MVC 8000 C in the Reactor Coolant System (RCS) was [

lo l4 l l leaking in the open position. The RCS was at the normal operating pressure of l

1olsll2235 psig. There were no adverse consequences as two PORV's remained OPERABLE. l l o l s l l Also, the Pressurizer is equipped with three code safety relief valves.

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l The event is attributed to worn valve packing. PORV block valve MVG 8000 C was l 1 o l i l i l l closed and its power was removed within one hour.

The packing was replaced, andl i 2 l the valve was tested satisfactory per applicable surveillance test and returned l l i l 3 l l to OPERABLE status. PORV block valves added to Station Preventive Maintenance l

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