ML20034E214
| ML20034E214 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 02/17/1993 |
| From: | Shelton D CENTERIOR ENERGY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 2117, NUDOCS 9302250237 | |
| Download: ML20034E214 (2) | |
Text
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.j GNTENf0R
.Y ENERGY Donald C. Shelton 300 Madison Avenue
' Vice President-Nuclear t-Toledo, OH 436520301 Daws Besse (419)249-2300 -
Docket Number 50-346 License Number NPF-3 Serial Number 2117 February 17, 1993 United States Nuclear Regulatory Commission Document Control Desk Washington, D. C.
.20555 Subj ect: Fire Protection - Portable Detection System Gentlemen:
The purpose of this letter is to update the NRC on the current testing-plans for the portable fire detection system (PDS) at the Davis-Besse Nuclear Power Station.
In a letter dated July 28,.1989 (Serial' Number 1689), Toledo Edison described the implementation of the PDS in order to reduce certain continuous fire watches to hourly fire watches. 'The July'28,-1989 letter stated that-functional testing of the PDS would be performed every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
However, in a_ letter dated. August 10, 1990
-(Serial Number 1835),. Toledo Edison stated that,. based on the first year's testing data,'which found the PDS..to be very reliable, daily testing was not warranted. The functional testing frequency vas.
changed from daily to veekly.
A review of over three years of testing data shows that the PDS continues to'be very reliable'. In consideration of the demonstrated high degree. of reliability and the desire to minimize unnecessary. --
testing an additional change in the testing frequency is justified.
-Accordingly,Lper discussions with the vendor, Toledo Edison is revising.
the functional testing frequency from weekly.to monthly. :A per; odic-channel functional test vill continue'to be performed on a six-month
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frequency. In addition, the PDS. vill still be checked once per hour-for alarm indications and verification that the phone line is-physically connected.
9302250237 930217'
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Should future testing data support further changes in the testing frequency of the PDS, Toledo Edison does not plan to update the NRC-by letter. Rather, such changes may be reviewed by the NRC inspectors.
If you have any questions regarding this matter, please contact Mr. Robert V. Schrauder, Manager - Nuclear Licensing, at (419) 249-2366.
Very truly yours,
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i QA-MKL/dle cc:
A. B. Davis, Regional Administrator, NRC Region III J. B. Hopkins, NRC Senior Project Manager S. Stasek, DB-1 NRC Senior Resident Inspector Utility Radiological Safety Board 6
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