ML20211E390

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Discusses Implementation of Westinghouse ATWS Mitigation Sys Circuitry (AMSAC) Mods for Plants.Unit 2 Mods Will Be Designed & Implemented Prior to Fuel Load.Unit 1 Will Rely on Current Procedures Noted in SER Until Refueling Outage
ML20211E390
Person / Time
Site: Vogtle  
Issue date: 10/13/1986
From: Bailey J
GEORGIA POWER CO.
To: Youngblood B
Office of Nuclear Reactor Regulation
References
GN-1113, NUDOCS 8610220435
Download: ML20211E390 (2)


Text

Georgia Pbwer Company Pbst Offica Box 282 Wantsboro, Georgia 30830 Telephone 404 554 9961 404 724-8114

' Southern Company Services, Inc.

Post Office Box 2625 Birmingham, Alabama 35202 Te!ephone 205 870-6011 y

gpg October 13, 1986 Director of Nuclear Reactor Regulation File:

X7BC35 Attention:

Mr. B. J. Youngblood Log:

-GN-1113 PWR Project Directorate #4 Division of PWR Licensing A U. S. Nuclear Regulatory Commission Washington, D.C.

20555-NRC DOCKET NUMBERS 50-424 AND 50-425 CONSTRUCTION PERMIT NUMBERS CPPR-108 AND CPPR-109 V0GTLE ELECTRIC GENERATING PIANT - UNITS 1 AND 2 ANTICIPATED TRANSIENTS WITHOUT SCRAM (ATWS)

Dear Mr. Denton:

Based upor information provided in the VEGP Final Safety Analysis Report, the staff concluded in the VEGP Safety Evaluation Report that the implementation of appropriate procedures is an acceptable means of coping with ATWS on an interim basis for full-power operation. The staff also noted that future modifications would be needed to implement the ATWS rule. Since then, GPC has closely observed the developments in the industry in response to ATWS, in particular the design development and staff review of the Westinghouse ATWS Mitigation System Actuation Circuitry (AMSAC) (WCAP-10858). In July 1986, the staff issued its Safety Evaluation Report for. AMSAC accepting it as a nat;infactory means of addressing ATWS.

Because of the short time remaining until our scheduled fuel load for Unit 1 and the lengthy lead time for procurement and delivery of AMSAC equipment, GPC proposes to continue its reliance upon appropriate procedures for coping with ATWS on an interim basis for full power operation of Unit 1.

It is GPC's plan to design and implement AMSAC modifications for Unit 2 prior to fuel load and Unit 1 during the first refueling outage. In either case, it is GPC's intention to install AMSAC prior to July 1989. AMSAC is a system that provides an alternate means for tripping the turbine and initiating auxiliary feedwater flow as required by 10 CFR 50.62(c)(1). GPC will amend the FSAR by October 1987 with the necessary design information to permit a staff review of the VFDP specific implementation of AMSAC.

0 8610220435 861013 l

{DR ADOCK 00000424 PDR

Director of Nuclear Reactor Regulation File: X7BC35 October 13, 1986 Log:

GN-1113 Page 2 If your staff requires any' additional information, please do not hesitate to contact me.

Sincerely, J. A. Bailey Project Licensing Manager JAB /sm Attachment xc:

R. E. Conway R. A. Thomas J. E. ' Joiner, Esquire B. W. Churchill, Esquire M. A. Miller (2)

B. Jones, Esquire G. Bockhold, Jr.

NRC Regional Administrator NRC Resident Inspector D. Feig R. A. McManus L. T. Cucwa Vogtle Project File 0784V J