ML20028H855

Special Rept:On 901215,Halon Fire Suppression Sys for Control Room walk-in Cabinets Declared Inoperable.Caused by Integrity Breach of Halon Containment Cabinet When Metal Panel Removed.Panel Reinstalled

ML20028H855
Person / Time
Site:	Fort Calhoun
Issue date:	01/28/1991
From:	Gates W OMAHA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LIC-91-0004S, LIC-91-4S, NUDOCS 9101310141
Download: ML20028H855 (2)

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Omaha Public Power District January 28, 1991 444 South 16th St eet Mall LIC-91-0004S Omaha. Nebraska 68102 2247 402/636 2000 U. S. Nuclear Regulatory Commission Attn Document Control Desk Mail Station P1-137 Washington, DC 20555

Reference:

Docket No. 50-285 Gentlement

SUBJECT:

Special Report on Inoperability of Fire Protection Equipment l

The Omaha Public Power District, holder of Operating License DPR- ,

40, submits this special report pursuant to the requirements of I Fort Calhoun Station Unit No. 1 Technical Specification 2.19,

" Fire Protection Systems".

Fort Calhoun Station Unit No. 1 Technical Specification 2.19(8) requires the control room, switchgear room, and cable spreading l rcom:Halon fire suppression systems be operable. With a Halon I system inoperable,-the establishment of a continuous fire watch with backup fire suppression equipment is required. "he system l must be restored to operable status within 14 days, or a report must be submitted to the NRC within 30 additional days, outlining the chuse of the inoperability and the plans for restoring the

.-nystem to operable-status.-

On December 15, 1990, the Halon fire suppression system for the control room walk-in cabinets ans declared inoperable. The cause l of inoperability was that the Halon containment integrity of the cabinet was branched when a metal panel was removed to support i required work inside the cabinets during a unit outage. The ]

metal-panel was reinstalled, and the Halon system was declared ,

operable on January 7, 1991. Appropriate compensatory measures, l as required by Technical Specification 2.19(8), were maintained l

for the' duration of the impairment.

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U. S. Nuclear Regulatory Commission LIC-91-0004S Page 2 If you have any questions, please contact me.

Sincerely, W. A ck S W. G. Gatos Division Manager Nuclear Operations WGG/jb c: LeBoeuf, Lamb, Leiby & MacRae W. C. Walker, NRC Project Manager R. D. Martin, NRC Regional Administrator, Region IV R. P. Mullikin, NRC Senior Resident Inspector

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U. S. Nucle 67 .sss,alatory Commission LIC-91-00048 Page 2 If you have any questions, please contact me.

Sincerely, 447 ll YoS' W. G. Gates Division Manager Nuclear Operations NGG/jb c LeBoeuf, Lamb, Leiby & MacRae W. C. Walker, NRC Project Manager R. D. Martin, NhC Regional Administrator, Region IV R. P. Mullikin, NRC Senior Resident Inspector

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