ML19326B504
| ML19326B504 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 10/20/1972 |
| From: | Phillips J ARKANSAS POWER & LIGHT CO. |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| 5756, NUDOCS 8004150840 | |
| Download: ML19326B504 (2) | |
Text
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n H E L Fa t he G SucLO A F3 n A r4 S A S v
ARK ANS AS POWER & LIGHT COMPANY October 20, 1972 3
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l'r. Angelo Giambusso
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Deputy Director for Reactor Projects cf,,
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v Dirc:terate of Licensing
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United States Atomic Energy Commission
@ f, Uashington, D. C.
20545
Subject:
Arkarisas Power & Light Company Arkansas Nuclear One-Unit 1 Docket No. S0-313 Flooding of Safety Related Erluinment
("3 Gent!em?n-
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l This letter is in response to I4r. DeVoung's letter of September 26,1972, v
which requested that Arkansas Pover & Light Company review the design of Arkansas i;uclear One-Unit 1 to determine any 6dverse affects on safety related equipment which might result from the failure of non-Category I (seismic) equipment, particularly in the circulating water systcm and fire protection system.
The criteria for the design and construction of Arkansas fluclear One-Unit 1 was that the failure of any non-Category I (seismic) equipment, including the circulating water system and fire protection system, would not adversely affect the performance of safety related equipment required for safe shutdown of the facility or to limit the consequence of an accident.
Safety related equipment in the turbine building is limited to waterproof cable. Safety related equipment in the auxiliary building is protected against external flooding up to a minimum of three feet above the level of wave action of the probable maximum flood.
In the case of l
a rupture in the ci culating water system, there would be no ficoding in the auxiliary building becau::e water would leak out of the non-watertight
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turbine building before reaching the probable maximum flood elevation.
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c q' Mr. Angelo Giachusso~ October 20, 1972 With the exception of the reactor building, diesel generator room, elec-trical penetration areas, diesel fuel storage tank vaults and cable spreading room, fire protection system sprinklers and piping are located only in areas where there is no safety related equipment.
In these areas, except the cable spre'ading room, the valves controlling the sprinkler systems are of the type that will open on a manual signal from the control room to preclude accidental flooding of these rooms.
All of the cable and terminal boxes in the cable spreading room are water-proof.
The fire pumps and accessories are located in the Class I portion of the intake structure. A drain is installed in the structure to prevent flooding due to pipe rupture. The fire pumps are separated from th service water pumps by a Class I wall'. The fire protection system piping is physically separated from critical systems to preclude damage to these systems.
Implementation of the above criteria is assured by the many design reviaw checks performed during the engineering and design phases of plant con-struction.
In addition, during construction the Quality Assurance persnnnel' are checking to insure that there is no relaxation of these
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Very truly yours,
-T J. D. Phillips Vice President and Chief Engineer JDP:1t O
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