ML20246J863
| ML20246J863 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 07/07/1989 |
| From: | Diederich G COMMONWEALTH EDISON CO. |
| To: | Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 8907170470 | |
| Download: ML20246J863 (1) | |
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i l
Commonwealth Edison l
taSalle County Nuclear Station RuralRoute #1, Box 220 Marseilles, Illinois 61341 Telephone 815/357-6761 July 7, 1989
~
f Mr. A. Bert Davis Regional Administrator Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen'Ellyn, Illinois 60137
Dear Sir:
This special report is submitted in accordance with LaSalle Unit 1 Operating License NpF-11 and Unit 2 Operating License NpF-18, Appendix A, Technical Specification 3.3.*l.9 and 6.6.C.
On June 7, 1989, the ultraviolet light detectors in fire detection zones 1-26 and 2-26 (Reactor Building Refuel Floor) were taken out of service due to a Troubleshooting of the system was begun but spurious continuous fire alarm.
had to be suspended before the root cause was determined because of Rerack Modification (M-1-2-86-002) work involving welding was begun in the same At this time This work is expected to be completed in July, 1989.
troubleshooting of the system will continue and corrective actions will be area.
taken.
In accordance with Action A of Technical Specification 3.3.7.9, an hourly fire watch patrol was established to inspect the affected areas during the time the On June 21, 1989 the detectors were out c ' service detectors are inoperable.
in excess of 14 days which requires that a special report be submitte1, per Technical Specification 6.6.C, within 30 days.
Fire detection zones 1-26 and 2-26 will be returned to operable service upon completion of the welding and troubleshooting of the ultraviolet light detectors.
G J. Diederich Station Manager LaSalle County Station GJD/GB/kg U.S.;NRC Document Control Desk xc:
INp0 - Records Center File - NRC Resident
[l G907170470 890707
( O PDR ADOCK 05000373 S
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