ML20126F969
| ML20126F969 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 12/24/1992 |
| From: | Diederich G COMMONWEALTH EDISON CO. |
| To: | Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 9301040001 | |
| Download: ML20126F969 (1) | |
Text
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@ Telephone 815/357-6761 C:mm:nwealth Edl=n LaSalle County Nuclear Station 2601 N. 21st. Rd.
Marseilles, Illinois 61341 December 24, 1992 IRIORITY RO' TING J
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.Mr. A.B. Davis T-p v
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Region III Administrator P
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U.S. Nuclear Regulatory Commission 5'It D 799 Roosevelt Road 7-j L
Glen Ellyn, IL. 60137
Dear Sir:
This special report is submitted in accordance with LaSalle Unit 1 Operating License NPF-11, Appendix A, and Technical Specifications 3.3.7.9 and 6.6.C.
On November 24, 1992 at 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br />, fire detection zone 1-34 exceeded its 14 day timeclock. Fire detection zone 1-34 was taken out of service on 11/10/92 at 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> to prevent spurious alarms while using a heat gun to support Motor Operated Valve work in the Unit 1 Reuctor Building on 761' elevation.
On November 27, 1992 at 2315 hours0.0268 days <br />0.643 hours <br />0.00383 weeks <br />8.808575e-4 months <br />, fire notection zone 1-35 exceeded its 14 day timeclock. Fire detection zone 1-35 was tsken out of service-on 11/13/92 at 2315 hours0.0268 days <br />0.643 hours <br />0.00383 weeks <br />8.808575e-4 months <br /> to prevent spurious alarms while welding and cutting in the Unit 1 Reactor Building on 761' elevation.
In accordance with Action Statement "A" of Technical Specification 3.3.7.9, an Hourly Fire Watch was established to inspect fire detection zones 1-34 and 1-35 while the detectors were out of service. The fire watch remained in affect for Detection Zone 1-34 until it was returned to service on 11/25/92 and for Detection Zone 1-35 until it was returned'to service on 11/28/92.
A Special keport is required because the detectors exceeded the allowable 14 day timeclock.
O G.J. Diederich hStationManager LaSalle County Station GJD/RV/mkl cc: Nuclear Licensing Administrator INPO - Records Center NRC Document Control Desk NRC Resident Inspector IDNS Resident Inspector
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