ML19325E522
| ML19325E522 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 10/27/1989 |
| From: | Diederich G COMMONWEALTH EDISON CO. |
| To: | Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 8911070341 | |
| Download: ML19325E522 (1) | |
Text
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Commonwealth Edison l: Sill) County Nucitar Station i
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- Rural Route #1, Box 220 Marseilles, Illinois 61341 PRIORITY ROUI'M Telephone 815/357 6761 Mr s t su =d i
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October 27, 1989 y]g
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Mr.
E. Dctis-ggggy j
Regiva-MI P hinistrator l
U.s. Nuclear Regulatory Commission j
199 Roosevelt Road ls Glen Ellyn, Illinois 60131
Dear sir:
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t This special report is submitted in accordance with.LaSalle Unit 1 operating i
License, NpF-11, Appendix A. Technical specification 3.7.5.2 and 6.6.C.
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on October' 1'4, 1989, at'1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br />, the ionization detectors a well as the f'
proaction sprinkler system _for the Hot Lab area were taken out of service.
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This action was taken following the unsatisfactory performance of Lasalle l
Electrical Surveillance LES-Fp-06, " Channel Functional Test of Dry pipe
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sprinkler. system Ionization Detectors." During the performance of this surveillance, it was observed that the local detection panel would not reset 7 j' i
properly.
b The detection and suppression systems for the Hot Lab area have been l
inoperable for greater than fourteen (14) days and therefore have exceeded the 14-day period allowed by Technical specifications 3.3.7.9 and 3.7.5.2 prior to
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. requiring a special report ~
p To' assure that the level of fire protection does not decrease during the
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l-course of.this event, Lasalle has met the requirements of Action Statement "a"
k of Technical Specification 3.7.5.2 by establishing a continuous fire watch and i,
providing backup suppression equipment for the affected zone. Station 3
i troubleshooting measures and vendor recommendations have been unsuccessful in identifying:the root cause. Additional assistance from the vendor is being l
.obtained'to identify the root cause. The root cause of this inoperability and repair:is expected to be completed by December 1,- 1989. A supplement-to this 4
letter will be provided when the cause has been determined.
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L, G. J. Diederich ll h/StationManager l,
LaSalle County Station 1
.GJD/GB/kg xc: Nuclear Licensing Administrator NRC Resident Inspector
, NRC Document Control Desk IMPO - Records Center S.h f
c 0911070341 891027 gj % 0 %
PDR ADOCK 05000373 S
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