ML19296A042

Responds to 780915 Request for Addl Info Re Essential Svc Water Cooling Tower General Arrangement,Tower Operating Counterflow Induced Draft Cooling Tower Fan Size,Range of Air Flows & Performance Curves.Drawings Encl

ML19296A042
Person / Time
Site:	Marble Hill
Issue date:	10/20/1978
From:	Coughlin J PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA
To:	Harold Denton Office of Nuclear Reactor Regulation
References
NUDOCS 7810300184
Download: ML19296A042 (6)

Text

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PUBLIC SERVICE INDIANA October 20,1978 James Coughhn v.m Pr. s.a.m -

Nut irar Mr. Harold R. Denton, Director Docket Nos. STN 50-546 Office of Nuclear Reactor Regulation STN 50-547 U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Denton:

In June of 1978 PSI transmitted to you additional information concerning our Ultimate Heat Sink Cooling Tower Design. On September 15, 1978, Mr. Jerry Wilson of the NRC requested the additional questions listed below be answered. Accordingly, we hereby submit our responses to the following NRC questions:

1. Request: What is the final useable volume of water in the basin?

Response: 14,380,000 gallons of useable water wi'l be stored in the ultimate heat sink basin.

2. Request: What is the drif t loss associated with the 30 day accident sequence?

Response: A drif t loss of 225,000 gallons would be associated with the tower operation over this 30 day period.

3. Request: Provide a sketch of the tower arrangement.

Response: Please find attached Drawing MS-129 7.ssential Tervice Water Cooling Tower General Arrangement.

4. Request: Please provide a sketch of the tower opera- .

Response: The attached sketch " Sketch of Tower Opera; ion C.unterflow Induced Draf t Cooling Tower" diagrammaticall; describes the operation of the Essential Service Water Cooling Tower.

5. Request: Provide the fan size of the tower and a range of air flows.

Response: Each cell of the cooling tower is equipped with a 26 foot or..neter,8 bladed fan. The maximum width of each f an blade is 31 inches. The fans are designed to run at two speeds. At full speed, the fan will induce an air flow of 669,000 cfm. The associated air flow for the fan at half speed is 335,000 cfm.

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Mr. Harold R. Denton, Director October 20,1978 Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555

6. Request: Relate the information filed June 9 to the Marble Hill design; for example, a temperature response curve based on fan speed with an upper or lower bound or enveloping curves.

Response: Please find attached copies of the performance curve included with the Ceramic Cooling Tower Company design for the Marble Hill towers. These curves show the range vs. approach at the design conditions and wet bulb temperature vs. approach for various ranges with the fan at full and half speed.

If you have any questions from these responses or believe that further clarification is necessary, please contact me.

r Sincerely yours,

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\ James Coughlin ,

Vics President-Nuclear' S3B:bai State of Indiana )

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County of Hendricks )

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Subscribed and sworn to me this W ~ ~ day of October,1978.

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