ML19317H092
| ML19317H092 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/21/1977 |
| From: | David Williams ARKANSAS POWER & LIGHT CO. |
| To: | Desiree Davis Office of Nuclear Reactor Regulation |
| References | |
| 1-127-15, NUDOCS 8004140575 | |
| Download: ML19317H092 (2) | |
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IE FILE COPY M GLPIN G BUILO ARKANSAS ARKANS AS POWER & LIGHT COMPANY pO. SCM 551 L,TTL. ACQK. A AK ANS A S 7 2 2Q 3. (501) 37 9
- dQQQ December 21, 1077 1-127-15 9
Director of Nuclear Reactor Regulation ATTN:
Mr. D. K. Davis, Acting Chief
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Operating Reactor Branch #2
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s U. S. Nuclear Regulatory Commission
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Washington, D. C.
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Subject:
Arkansas Nuclear One-Unit 1
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Docket No. 50-313 f..'
's License No. DPR-51
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Description of Phase Two Interim Insta11atio for Cooling North and South Battery / Charger Areas (File: 0520 6 1510)
Gentlemen:
Per conversation with Mr. R. Snaider and other members of your staff, attached find the description of our interim installation to temporarily rectify that situation as reported in Reportable Occurrence Report No.
50-313/77-19 (dated September 20, 1977).
Phase One of our corrective measures (as delineated in our September 13, 1976, meeting with your staff and documented in your minutes and safety evaluation transmitted to us on November 4, 1977) was implemented on September 26, 1977.
Phase Two for which this letter transmits the description of the installation was completed on December 5, 1977. The attached description and associated drawing.) detail this installation for your review.
The Phase Three (final and permanent installation) will be forwarded for your revies, upon completion of design.
If you have any questions and/or comments concerning the above, please advise.
Very truly yours,
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Daniel H. Williams Manager, Licensing DHW:RMC:dr
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3 Description of Phase Two Temporary Installation in North and South Battery / Charger Areas The South battery / charger room temporary air conditioning system is comprised of one York Model CA-121-45 (10 ton) condensing unit and one York Model EBV-62-45 (5 ton) evaporative blower unit.
D e condensing unit, VE-1A, consists of a compressor, a refrigerant condenser, two condenser fans with motors, and low ambient and capacity controls. The condensing unit is located due south of Stair #3 on elevation 372'-0", and is controlled through a 24 volt circuit by a themostat, TS-7824, located in the charger room. The power supplied to the condensing unit is 480V, 30, 60Hz taken from MCC-B-55.
He evaporative blower unit, VUC-13A, consists of a direct expansion coil, a 1500cfm blower, and a blower motor with 480V, 30, 60Hz power supplied from MCC-B-55.
He evaporative unit is located along the south wall of the corridor leading to the South Charger Room. The makeup air to the evaporative blower is taken from the corridor, passed across the direct expansion coil, and discharged into the charger room via ductwork. The evaporative blower is controlled through a 24 volt control circui.t located within the condensing unit.
H e North battery / charger room temporary air conditioning system is comparised of one York Model CA-121-45 (10 ton) condensing unit and one York Model EBV-62-45 (5 ton) evaporati.e blower unit.
He condensing unit, VE-1B, consists of a compressor, a refrigerant condenser, two condenser fans with motors, and low ambient and capacity controls. The condensing unit is located due north of Stair #3 on elevation 372'-0", and is controlled through a 24 volt circuit by a thermostat, TS-7825, located on the south wall of the charger room. The power supplied to the condensing unit is 480V, 39, 60Hz taken from MCC-B-55.
He evaporative blower unit, VUC-13B, consists of a direct expansion coil, a 1500cfn blower, and blower motor with 480V, 30, 60Hz power supplied from MCC-B-55.
D e evaporative blower unit is located directly across the corridor from the entry to the north charger room.
The makeup air to the evaporative blower is taken from the corridor, passed across the direct expansion coil, and discharged into the charger room via ductwork. The evaporative blower is controlled through a 24V control circuit located within the condensing unit.
R ese air conditioning systems are thermostatically controlled and 0
are designed to maintain a maximum temperature of 104 F in each of the battery / charger rooms when the turbine building ambient air temperature is 1220F. These systems are set to turn off when the ambient temperature 0
in the battery / charger rooms reaches 87 F.
To prevent frequent cycling O
of the units, the thermostats have been set to turn the units back on after i
h a 100F rise occurs.
Low ambient and capacity controls with a hot gas i
bypass have been incorporated into each condensing unit for system protection.
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