ML20206F542

Special Rept 88-17:on 881026,technicians Discovered That Fire Barrier Doors Were Not Restored to Operable Status within 7 Days as Required by Tech Spec 3.14.6.2.Fire Barrier Doors Were Returned to Operable Status

ML20206F542
Person / Time
Site:	Rancho Seco
Issue date:	11/14/1988
From:	Dewitt R SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
88-17, AGM-NPP-88-584, NUDOCS 8811210192
Download: ML20206F542 (2)

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esuun SACRAMENTO MUNICIPAL UTILITY DISTRICT O P. O. Box 15830. Sacramento CA 95852-1830,1916)452 3211 AN ELECTRIC SYSTEM SERVING THE HEART OF CALIFORNIA AGH/NPP 88-584 November 14, 1988 U. S. Nuclear Regulatory Commission Attn: J. B. Hartin, Regional Administrator Region V 1450 Haria Lane, Suite 210 Halnut Creek, CA 94596 Docket No. 50-312 Rancho Seco Nuclear Generating Station License No. DPR-54 SPECIAL REPORT NUMBER 88-17: FIRE BARRIERS BhtaCHED HORE THAN 7 DAYS

Dear Mr. Hartin:

Fire barrier doors NS 155, NS 238 and NS 240 were not restored to operable status within the 7 days specified in the Rancho Seco Technical Specifications. The Sacramento Municipal Utility District hereby submits Special F, rt No. 88-17 in accordance with Rancho Seco Technical Specifica sn 3.14.6.2.

Hemoers of your staff with questions requiring additional information or clarification may contact Mr. Kurt Zimmermann at (916) 452-3211, extension 4627.

Sincerely, i -

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.Ru,)canAlb d'N sell B. DeWitt Acting Assistant General Manager Nuclear Power Production Attachment cc w/atch: A. D'Angelo, NRC, Rancho Seco

' Document Control Desk, Washington DC l

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G811210192 831114

{DR ADOCK 05000312 PDC

[1 i RANCHO SECO NUCLEAR GENERATING STATiofJ D 1444o Twin Ct.ies Road, Herald, CA 95638 9799;(209) 333 2935

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SPECIAL REPORT FUMBER 88-17 Fire Barriers Breached More Than 7 Days Date of Occurrence October 26, 1988 Plant Conditions at Time of Occurrence The plant was at approximately 90% power on Octooer 19, 1988. Control Roou Operators conducted a controlled shutdown in accordance with Technical Specifications on October 24. The plant was in hot shutdown on October 26.

Identification of Occurrence Fire barrier doors HS 155, NS 238 and NS 240 were not restored to operable status within 7 days as required by Technical Specification 3.14.6.2.

Descriotion of Occurrence On October 19, 1988, during the performance of Surveillance Procedure SP.1004, "Refueling Interval Fire Barrier Surveillance Procedure," techricians discovered the indicated discrepancies on the associated fire doors:

• NS 155 - deficient closer mec'hanism

• NS 238 - nonoperable door latch

• NS 240 - nonfunctional door coordinator All three doors are locate'd in the fluclear Services Electrical Building.

Corrective Action Taken An hourly firewatch was previously posted in the area and satisfied the Technical Specification 3.14.6 requirement for the deficiency. The fire barrier doors were restored to operable status on October 31, 1988.

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