ML20207J282

Special Rept 86-15:on 861110,penetrations Through Floor of 4160 Volt Switchgear 1D Vault & Floor of Motor Generator Set Room Found Degraded.As of 861117,penetrations Not Restored to Functional Condition.Hourly Fire Watch Patrol Initiated

ML20207J282
Person / Time
Site:	Oyster Creek
Issue date:	12/16/1986
From:	Fiedler P GENERAL PUBLIC UTILITIES CORP.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
86-15, NUDOCS 8701080371
Download: ML20207J282 (3)

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GPU Nuclear Corporation Nuclear  ::nsn:r388 Forked Piver,New Jersey 08731-0388 609 971-4000 i Writers Direct Dial Number:

December 16, 1986 Dr. Thomas E. Murley, Administrator Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406

Subject:

Oyster Creek Nuclear Generating Station Docket No. 50-219 Special Report 86-15 Enclosed is Special Report No. 86-15 which is submitted in accordance with Technical Specifications 3.12.E.2.

If any questions or comments should arise, please contact Mr. George Busch, Oyster Creek Licensing Engineer at (609)971-4909.

Very truly yours, Vice President and Director Oyster Creek PBF/GB/ dam (0666A)

Enclosure cc: NRC Resident Inspector Oyster Creek Nuclear Generating Station Forxed River, NJ 08731 87010 PDR hb G

GPU Nuclear Corporation is a subsidiary of the General Public Utilities Corporation 8W (

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0YSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 Special Report 86-15 Report Date December!16,1986 Occurrence Date November 17, 1986 Identification of Occurrence Failure to restore degraded fire barrier penetration seals to functional status within 7 days from the time of discovery. This event is considered to be reportable as defined in Technical Specifications, paragraph 3.12.E.3.

Description of Occurrence On November 10, 1986, during the installation activities of conduit fire barrier material (Thermo-Lag) for Appendix R requirements, two conduit penetrations through the floor of the 4160 volt switchgear ID vault and penetrations through the floor of the motor generator set room were discovered to be degraded. Specifically, the penetration seal configurations only rendered a one hour fire rating in lieu of a three hour fire rating as required by the Oyster Creek Fire Hazards Analysis. Due to the existing fire loading in the area of the degraded seals being below a one hour fire severity, repair activities to upgrade the seals to a three hour fire rating l

was not given top priority. This was based on the rating 9f the degraded seals still being adequate to protect the areas from the hazards present.

Due to the above consideration, the penetration seals were not restored to a functional condition within 7 days as required by Technical Specifications paragraph 3.12.E.3.

Corrective Actions L An hourly fire watch patrol was established within one hour of discovering the degraded fire barrier seals as required by Technical Specifications paragraph 3.12.E.2. The hourly fire watch patrol will continue until the seals are restored to functional status which presently is scheduled to be completed by l February 28, 1987.

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