ML20235T788

Special Rept 89-02 on 890125:fire Barrier Mechanical Penetration 2233 Not Restored to Operable Status within 7 Days Per Tech Specs & Rubber Boot Seal Removed from Penetration.Hourly Firewatch Posted & Penetration Restored

ML20235T788
Person / Time
Site:	Rancho Seco
Issue date:	02/23/1989
From:	Keuter D SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
89-02, 89-2, AGM-NPP-89-079, AGM-NPP-89-79, NUDOCS 8903080473
Download: ML20235T788 (2)

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i g% SMUD "cm SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street, P.O. Box 15830, Sacr"tidentoUA 95852-1830,(916) 452 3211 AN ELECTRIC SYSTEM SERVING THE HEART OF CALIFORNIA

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l AGM/NPP 89-079 February 23, 1989 1

l U. S. Nuclear Regulatory Commission Attention: J. B. Martin, Regional Administrator Region V 1450 Maria Lane, Suite 210 Halnut Creek, CA 94596 Docket No. 50-312 Rancho Seco Nuclear Generating Station License No. DPR-54 SPECIAL REPORT NUMBER 89-02: FIRE BARRIER BREACHED MORE THAN 7 DAYS l

Dear Mr. Martin:

Fire barrier mechanical penetration 2233 was not restored to operable status within the 7 days required by the Rancho Seco Technical Specifications. The Sacramento Municipal Utility District hereby submits Special Report No. 89-02 in accordance with Technical Specification 3.14.6.2.

Members of your staff with questions requiring additional information or clarification may contact Mr. Kurt Zimmermann at (209) 333-2935, extension 4627.

Sincerely, ,

hD& W n Dan R. Keuter g'AssistantGeneralManager Nuclear Power Production Attachment cc w/atch: A. D'Angelo, NRC, Rancho Seco Document Control Desk, Washington, DC 8903000473 890223I2 k DR ADDCK 0500

-r&M RANCHO SECO NUCLEAR GENERATING STATloN D 1444o Twin Cities Road, Herald, CA 95638-9799;(209) 333-2935

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. SPECIAL REPORT NUMBER 89-02

- Fire Barrier Breached More Than 7 Days -

o-Date of Occurrence January 25, 1989 Plant Conditions at Time of Occurrence The plant was at 92% steady state power operation.

Identification of occurrensk l

Fire barrier mechanical penetration 2233 was not restored to operable status I within the 7 days required by Technical Specification 3.14.6.2. The delay I beyond the 7. day requirement was'due to not having qualified material necessary to restore the rubber boot fire-rated seal to operable status. A review by Nuclear Engineering was required to qualify the available material.

Description of Occurrence While conducting an inspection of heat tracing on a sample line pipe, plant insulators inadvertently removed the rubber boot seal from mechanical penetration 2233 to facilitate the inspection. The rubber boot is part of the mechanical penetration seal for the fire barrier.

1 Corrective Action Taken An hourly.firewatch was previously posted in the area and satisfied the Technical Specification 3.14.6 requirement for the deficiency. Mechanical penetration 2233'was restored to operable status on January 25, 1989. The plant-insulators were briefed by fire protection personnel on requirements regarding boot seals.

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