ML20207C788

Special Rept:On 880628-0708,fire Barriers Found Degraded in Numerous Areas During Routine Surveillance.Hourly Fire Patrol Established.Caused by Const & Remodeling.Listed Maint Orders Issued.Restoration Scheduled for 880901

ML20207C788
Person / Time
Site:	Fort Calhoun
Issue date:	08/04/1988
From:	Morris K OMAHA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
LIC-88-596, NUDOCS 8808100218
Download: ML20207C788 (2)

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Omaha Public Power District 1623 Harney Omaha. Nebraska 68102 2247 402/536-4000 August 4, 1988 LIC-88-596 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station PI-137 Washington DC 20555

Reference:

Docket No. 50-285 Gentlemen:

SUBJECT:

Special Report on Incperability 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) re-quires 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 thirty days a report to the Nuclear Regulatory Commission pursuant to Technical Specification 5.9.3.

From June 28, 1938 through July 8,1988 during routine surveillance of plant fire barriers, the wall separating fire areas 19 and 20 was found to be degrad-ed in numerous areas. Within one hour of the initial discovery, an hourly firewatch patrol was verified as being in place on one side of the affected bar-rier per Technical Specification 2.19. Although a preliminary investigation of

+he cause of the degraded carrier points to initial construction or subsequent remodeling, a further study will be conducted to attempt to determine the activities that caused the degradation.

In several areas, the barrier cannot be repaired using existing plant proce-dures for tested assemblies, therefore, an engineering evaluation was needed to determine the materials and methods to be used to restore the barrier to its required fire rating of one and a half to two hours as stated in the Fire Protection SER. The following maintenance orders have been issued to repair the inoperable barrier and penetration seals per the evaluation and existing G808100218 PDR 880804 o

ADOCK 05000285 PDC

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U. S. Nuclear Regulatory Commission LIC-88-596 Page 2 plant procedures. Restoration of the barrier to operable status is currently scheduled for September 1,1988.

882804 882809 882950 882954 882999 882805 882810 882951 882996 883001 882806 882811 882952 882997 883002 882808 882812 882953 882998 883003 The fire barrier has been inoperable in excess of seven days and an hourly firewatch patrol is being. maintained in the affected area. A follow-up report will be issued within thirty days of completion of the restoration detailing the corrective actions taken. This report is being issued within the thirty day limit specified in Technical Specification 2.19(7).

Sincerely,

& b K. J. Morris Division Manager Nuclear Operations KJM:bjb c: LeBoeuf, Lamb, Leiby and MacRae 1333 New Hampshire Avenue, N.W.

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

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