ML20153E973

Concurs W/Util Proposal to Proceed W/Implementation of RWCU Sys Temp Isolation Setpoint Change as Authorized by Amend 144

ML20153E973
Person / Time
Site:	Hatch
Issue date:	05/04/1988
From:	Crocker L Office of Nuclear Reactor Regulation
To:	Mcdonald R GEORGIA POWER CO.
References
TAC-62758, NUDOCS 8805100190
Download: ML20153E973 (3)

Text

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[ j#""% UNITED STATES O

j g,' *% NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555

%.,,,. May 4, 1988 Docket No.: 50-321 Mr. R. P. Mcdonald Executive Vice President -

Nuclear Operations Georgia Power Company P.O. Box 4545 Atlanta, Georgia 30302

Dear Mr. Mcdonald:

j

SUBJECT:

REACTOR WATER CLEANUP SYSTEM TEMPERATURE ISOLATION SETPOINTS (TAC 62758) l Re: Hatch Nuclear Station, Unit 1  ;

l On August 10, 1987, the NRC issued Amendment No. 144 to the operating license for the Edwin 1. Hatch Nuclear Plant, Unit 1, authorizing an increase in the setpoint for isolation of the Reactor Water Cleanup System (RWCU) upon detection of high ambient temperature in the RWCU equipment rooms. The authorized change to the temperature setpoint was based upon information provided in your letter of August 25, 1986 as supplemented by information i provided in your letter of January 23, 1987. 1 On October 26, 1987, you notified us that while in the process of implementing the authorized change a question had arisen regarding the adecuacy of the )

analysis used to support the change for Unit 1. (The original analysis had i used the design curves for Unit 2 as being applicable to Unit I also.) i Accordingly, your October 26, 1987 letter stated that the setpoint change would not be implemented on Unit I until you had checked the adequacy of the analysis, resolved any diecrepancies, and had obtained the concurrence of the NRC.

On April 28, 1988, you notified us that your architect / engineers had completed !

a plant specific analysis for Unit I and had determined that the originally i requested setpoint change could be justified using the plant specific data, i Equipment qualification temperatures and reactor coolant inventory loss values '

for Unit 1, based upon the plant specific analysis, were at or below the values which were previously reported based upon the Unit 2 curves used in the initial calculations. Accordingly, you requested NRC concurrence to proceed with implementation of the setpoint change.

8805100190 880504 DR ADOCK 050 1

1.-

Mr. R. P. Mcdonald Edwin I. Hatch Nuclear Plant, Georgia Power Company Units Nos. I and 2 I

cc:

G. F. Trowbridge, Esq.

Shaw, Pittman, Potts and Trowbridge 2300 N Street, N. W.

Washington, D.C. 20037 Mr. L. T. Gutwa Engineering Department Georgia Power Company P. O. Box 4545 Atlanta, Georgia 30302 l Nuclear Safety and Compliance Manager Edwin I. Hatch Nuclear Plant Georgia Power Company P. O. Box 442 Baxley, Georgia 31513 Mr. Louis B. Long Southern Company Services, Inc.

P. O. Box 2625 Birmingham, Alabama 3520E Resident inspector U.S. Nuclear Regulatory Commission Route 1, Box 725 Baxley, Georgia 31513 Regional Administrator, Region II V.S. Nuclear Regulatory Comission ,

101 Marietta Street, Suite 2900 l Atlanta, Georiga 30323 '

Mr. Charles H. Badger Office of Planning and Budget Room 610 270 Washington Street, S.W.

Atlanta, Georgia 30334 Mr. J. Leonard Ledbetter, Comissioner Department of Natural Resources 270 Washington Street, N.W.

Atlanta, Georgia 30334 Chairman Appling County Comissioners County Courthouse Baxley, Georgia 31513

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Mr. R. P. Mcdonald As stated in sour letter of January 23, 1987, the design curves for Unit 2 bound those for Unit I and could be conservatively used to determine the allowable setpoint increase. Your letter of April 28, 1988 confirms that this is indeed the case. Therefore, toe NRC concurs with your proposal to proceed with implemertation of the setpoint change as-authorized by Amendment No. 144 Sincerely, Original signed by:

'mawrence P. Crocker, Project Manager Project Directorate 11-3 Division of ReatWrs Project - 1/II cc:

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