05000312/LER-1982-028, Forwards LER 82-028/99X-0.Detailed Event Analysis Submitted

Forwards LER 82-028/99X-0.Detailed Event Analysis Submitted

ML20028A278
Person / Time
Site:	Rancho Seco
Issue date:	11/01/1982
From:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20028A279	List: 05000312/LER-1982-028, Forwards LER 82-028/99X-0.Detailed Event Analysis Submitted 05000312/LER-1982-028-99, /99X-0:on 820922,small Pieces of Matl Resembling Paint Chips Observed During Flow Control Valve Repair in Auxiliary Bldg Fire Protection Sys.Probably Caused by Detached Liner Matl.Piping to Be Inspected & Repaired
References
NUDOCS 8211180033
Download: ML20028A278 (2)

LER-1982-028, Forwards LER 82-028/99X-0.Detailed Event Analysis Submitted

Event date:
Report date:
3121982028R00 - NRC Website

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SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 s street, Box 15830, Sacramento, Califomia 95813; (916) 452-3211 O WI ~4 jy y November 1, 1982 MEW)yy;;

R H ENGELKEN, REGIONAL ADMINISTRATOR REGION V 0FFICE OF INSPECTION AND ENFORCEMENT U S NUCLEAR REGULATORY COMMISSION 1450 MARIA LANE SUITE 210 WALNUT CREEK CA 94596 DOCKET N0. 50-312 LICENSE NO. DPR-54 LICENSEE EVENT REPORT NUMBER 82-28 In accordarce with Regulatory Guide 1.16, section C.4, the Sacramento Municipal Utility District hereby submits Licensee Event Report Number 82-28, of the following item of interest.

On September 22, 1982, during repairs of a flow control valve in the Auxiliary Building fire protection system at Rancho Seco, materials similar to paint chips were discovered in a two-inch feeder line of Fire Zone 18.

The chips were removed and further investigation was initiated to determine the extent of the spread of this debris. The four levels in the Auxiliary Building were flushed through three drain valves and additional chips were found in all levels. The debris is at present believed to be chips of plastite lining from the auxiliary fire system piping.

To correct this problem, the District is taking the following action:

1) Temporary bypass piping will be installed in the Auxiliary Building.

2) The existing piping will be inspected to determine the con-dition of the lining. Subsequent repairs will depend on this inspection.

3)

Following completion of repairs system flushing following NFPA 13-A guidelines and a systematic inspection of sprinkler heads should ensure system reliability.

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..8211180033 821101 l

PDR ADOCK 05000312 S

PDR AN ELECTRIC SYSTEM SERVING MORE THAN 600.000 IN THE HEART OF CAllF

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'R. H. Engelken _ November;,1,~)982 1

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' It should be;noted that, due to the small size of the chips, the District does consider'the fire protection system'to be operable in

- the Auxiliary Building since.there -is no evidence that this problem-has' compromised its ability to perform its desianed function.

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John J. Mattimoe i

General Manager h

cc: DCD, Washington INP0 i.

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