ML20138G705

Special Rept:On 961109 & 23,detection & Fire Detection Zone 1-31 Taken OOS to Support Welding,Cutting & Grinding Activities within Zone During Unit 1 Forced Outage.Fire Watch Patrol Established IAW Action Statement a

ML20138G705
Person / Time
Site:	LaSalle
Issue date:	12/13/1996
From:	Ray D COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9701020219
Download: ML20138G705 (2)

Text

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, Commonwealth 1:dison Company Li%lle Generating Station

, 2601 North 21st Ibad 0

Wrxilles. 11. 61!-11 N757 Tel HI 5.M7C61 i

December 13,1996 United States Nuclear Regulatory Commission Attentiori: Document Control Desk Washington, D.C. 20555 4

Subject:

Special Report on Fire Detection Zone 1-31 4

This Special Report is submitted in accordance with LaSalle Unit 1 Operating License NPF-11, Appendix A, and Technical r Specifications 3.3.7.9 and 6.6.C.

Technical Specification 3.3.7.9 requires as a minimum, the fire detection instrumentation for each fire detection zone of Unit 1 and Unit 2 shown in Table 3.3.7.9-1 shall be OPERABLE whenever the equipment protected by l the detection instrument is required to be OPERABLE. l

. Detection Zone 1-31 was taken out-of-service at 0105 hours0.00122 days <br />0.0292 hours <br />1.736111e-4 weeks <br />3.99525e-5 months <br /> on i

November 9,1996, to support welding, cutting, and grinding activities within the zone during the Unit 1 Forced Outage (L1F35). At 0105 hours0.00122 days <br />0.0292 hours <br />1.736111e-4 weeks <br />3.99525e-5 months <br /> on November 23,1996, Fire Detec*.lon Zone 1-31 was inoperable for a period j

! greater than fourteen (14) days. This detection zone is located in the Unit 1 Reactor Building at elevation 673'-4".

1 During the Forced Outage, a number of activities such as welding, cutting, i and grinding are performed within Detection Zone 1-31. These activities I have caused the detection zone to alarm in the past. The alarms caused by the welding, cutting, and grinding activities have the potential to distract and desensitize workers to fire alarms.

A fire watch patrol was established in accordance with Action Statement a.

of Technical Specification 3.3.7.9 to inspect the zone at least once per hour while the detectors were out-of service. This fire watch patrol remained in place until Detection Zone 1-31 was retumed to service on November 27,1996.

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o The fire watch patrol, along with the additional fire protection measures provided when welding, cutting, and grinding activities were in progress,  !

ensured detection capability was available while Detection Zone 1-31 was out-of-service.

If there are any questions or comments concerning this letter, please refer them to me at (815) 357-6761, extension 2212.

Respectfully, x D D.J. Ray Station Manager LaSalle County Station  ;

I cc: A. B. Beach, NRC Region 111 Administrator i M. P. Huber, NRC Senior Resident inspector - LaSalle D. M. Skay, Project Manager - NRR - LaSalle  !

F. Niziolek, Office of Nuclear Facility Safety - IDNS  !

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