ML20151J589

Ro:On 880616,seal 70-F-222 Found Inoperable.Caused by Normal Seal Matl Shrinkage.Hourly Fire Watch Established.Barrier Restored to Operable Status Using Routine Repair Procedures

ML20151J589
Person / Time
Site:	Fort Calhoun
Issue date:	07/25/1988
From:	Morris K OMAHA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
LIC-88-641, NUDOCS 8808030015
Download: ML20151J589 (2)

Text

Omaha Public Power District 1623 Harney Omaha, Nebraska 68102 2247 402/536 4000 July 25, 1988 LIC-88-641 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station Pl-137 Washington, DC 20555

Reference:

Docket No. 50-285 Gentlemen:

SUBJECT:

Special Report on Inoperability of Fire Barrier The Omaha Public Power District, holder of Operating License DPR-40, submits this special report pursuant to the requirements of Fort Calhoun Station Unit No.1 Technical Specification 2.19, "Fire Protection System."

Fort Calhoun Station Unit No.1 Technical Specification Section 2.19(7) requires that all penetration fire barriers protecting safety-related areas shall be functional (intact). With a penetration fire barrier nonfunctional, within one hour, either establish a continuous firewatch on at least one side of the affected penetration, or verify the operability of fire detectors on at least one side of the penetration and establish an hourly firewatch patrol. Restore the nonfunctional penetration to functional status within seven days, or prepare and submit within an additional 30 days a report to the Nuclear Regulatory Commission pursuant to Technical Specification 5.9.3. l On June 16, 1988 during routine surveillance of plant fire barriers and I penetration seals, seal number 70-F-222 was found inoperable. The cause of the degraded seal was determined to be normal seal material shrinkage resulting in unacceptable gaps in the assembly. After verifying operability of detection on each side of the affected barrier, an hourly firewatch was verified as being in place per Technical Specification 2.19(7) within one hour of discovery. On June 24, 1988, the barrier was restored to operable status using routine repair procedures.

8808030015 880725 PDR ADOCK 05000D05 S PNU 4, s e r 5 2 2-

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. - i V. S. Nuclear Regulatory Commission LIC-88 641 Page 2 l

The fire barrier was inoperable in excess of seven days, with an hourly firewatch in place during the entire inoperable period. No follow-up notification is planned since the barrier is now intact. This report is being issued within the 30 day limit specified in Technical Specification 2.19(7).

Sincerely, ,

X. J.

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orris Division Manager Nuclear Operations KJM/me c: LeBoeuf, Lamb, Leiby & MacRae i 1333 New Hampshire Ave., N.W.

Washington, DC 20036 R. D. Martin, NRC Regional Administrator P. D. Milano, NRC Project Manager P. H. Harrell, NRC Senior Resident Inspector A. J. Mechtenberg i

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