ML19290E902
| ML19290E902 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 06/26/1979 |
| From: | Macdougall E BROOKHAVEN NATIONAL LABORATORY |
| To: | Knight J Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8003170285 | |
| Download: ML19290E902 (1) | |
Text
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Y%10 BROOKHAVEN NATIONAL LABORATORY ASSOCIATED UNIVERSITIES, INC.
Upton New Vcrk 11973 Cepcriment of Nuctect Energy (516) 345-2362 June 26, 1979 Mr. Jim Knight Plant Systems Branch Division of Operating Reactors U. S. Nuclear Regulatory Commission Wa shi ngton, D. C.
20555 Re: La Crosse - Boiling Water Reactor
Dear Jim:
I have reviewed the wiring change made in the fire alann circuit as shown marked upon the Pyrotronics, Inc. print #530-217098 revi sion.
Even though a light indicator shows when a zone is by-passed, the switch could be left in the by-pass nosition for prolonged periods.
This in turn could bring about the situation of a fire occurring, the detector sensing the fire but no alarms sounding. Therefore, I recommend that the licensee be asked to return the circuit to its original wiring configuration.
The source of the problem is the sounding of the alann for reasons other than a true fire.
I suggest that for these areas where this occurs other types of detectors be considered.
Even though the sensitivity of detection would be lessened, the overall protection would be improved.
Another approach that I would recommend would be the installation of a timer for each by-pass that would restore the by-passed condition after a fixed i nterval.
Very truly, f,
.CV!
Edward A. MacDougall Reactor Engineering Analysis EAM:bb cc:
R. Cerbone R. Ferguson R. Hall W. Ka to J. Klevan 19 G. Lainas i
T. Lee 8 0 03170 R B 5