ML19256A940

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Confirms Telecon of 790108.Cost to Provide Emergency Power Source for 4 Smoke Detectors in Diesel Generator Fuel Storage Tank Is Excessive.They Have Electric Supervision & Are Alarmed in Control Room.Request Exemption
ML19256A940
Person / Time
Site: Arkansas Nuclear Entergy icon.png
Issue date: 01/10/1979
From: David Williams
ARKANSAS POWER & LIGHT CO.
To: Reid R
Office of Nuclear Reactor Regulation
References
1-019-3, 1-19-3, NUDOCS 7901170178
Download: ML19256A940 (2)


Text

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ARKANSAS POWER & LIGHT COMPANY POST OFFICE BOX 551 LITTLE ROCK. ARKANSAS 72203 (501) 371-4000 January 10, 1979 1-019-3 Director of Nuclear Reactor Regulation ATTN: Mr. Robert W. Reid Operating Reactors Branch #4 U. S. Nuclear Regulatory Commission Washington, D.'C. 20555

Subject:

Arkansas Nuclear One-Unit 1 Docket No. 50-313 License No. DPR-51 Fire Protection (File: 1510, 2040)

Gentlemen:

The following is provided to document the agreement reached by your Mr. II. George and Our M. White during telecons January 8,1979.

In our letter dated Jun'e 15, 1978, we committed to providing an emer-gency power source (a source of power available during a loss of offsite power) for al.1 fire detectors. In addition, the Arkansas Nuclear One, Unit 1 Fire Protection SER requires that this modifica-tion be completed by the end of the 1979 refueling outage.

As explained to Mr. H. George, the cost of providing an emergency power source for the four (4) smoke detectors located in the Diesel Generator Fuel Storage Tank Vault would be excessive. To provide emergency power to these detectors would require installation of considerable under-ground conduit or installation of a separate local power source for which we have no room in addition to the great cost.

Even thot3gh these four (4) detectors will not be provided an emergency power source, they are electrically supervised and if ..ormal power is lost, an annunciator will alarm in the control room. If power is lost, Technical Specification 3.5.5.2 requires us to immediately establish a fire patrol watch to inspect the zone at least once per hour.

7901170118 MEMBEA MICOLE SOUTH UTlUTIES SYSTEM r

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Mr. Robert W. Reid January 10, 1979 Page Two As stated above, we will provide a source of emergency power to all detectors except for the four (4) noted. We hope that the need for this small exemption is appreciated as a means of providing adequate fire protection at a reasonable cost.

Very truly yours,

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Danici 11. Williams Manager, Licensing DilW/ MOW /mmb e

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