ML19331D874

Describes Interim Actions Needed Prior to Issuance of OL to Further Reduce Risk from ATWS Before Required Plant Mods, as Determined by Commission,Are Completed.Atws Emergency Operating Procedure Should Be Submitted

ML19331D874
Person / Time
Site:	Wolf Creek
Issue date:	08/15/1980
From:	Tedesco R Office of Nuclear Reactor Regulation
To:	Koester G KANSAS GAS & ELECTRIC CO.
References
NUDOCS 8009030685
Download: ML19331D874 (3)

Text

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UNITED STATES y,3 g; ;

NUCLEAR REGULATORY COMMISSION 73 M,7, '

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AUG 151930 Docket No.:

50-482 Kansas Gas & Electric Company ATTN: Mr. Glen L. Koester Vice President - Operations Post Office Box 208 Wichita, Kansas 67201

SUBJECT:

INTERIM ACTIONS NEEDED FOR PLANT OPERATION PENDING FINAL RESOLUTION OF ANTICIPATED TRANSIENTS WITH FAILURE TO SCRAM (ATWS) (WESTINGHOUSE PWR)

In December 1978 the Nuclear Regulatory Commission (NRC) staff issued Volume 3 of NUREG-0460 which describes the proposed type of plant modifications the staff believes are necessary to reduce the risk from anticipated transients with failure to scram (ATWS) to an acceptable level. The NRC's Regulatory Requirements Review Comittee completed its review in January 1979, and concurred with the staff's approach described in Volume 3 of NUREG-0460, insofar as it applies to your plant.

The staff has issued requests for the industry to supply generic analyses to confirm the ATWS mitigation capability described in Volume 3 of NUREG-0460. Subsequently, the staff plans to present its recommendations for rulemaking on ATWS to the Conmission. The Commission would, by rulemaking, determine the required modifications to resolve ATWS concerns and the required schedule for the implementation of such modifications. Your plant would, of course, be subject to the Commission's decision in this matter.

Based on considerations described in pages 42 through 45, Volume 3 of NUREG-0460, the staff generally concluded that plants with operating licenses can continue to operate without undue risk to the health and safety of the public during the estimated 2 to 5 year period needed to implement the necessary modifications.

However, the staff believes the following steps should be taken as a prudent course prior to the issuance of an operating license in order to further reduce the risk from ATWS events during the interim period before the required plant modifications as determined by the Commission are completed.

1.

An emergency operating procedure should be developed for an ATWS event, including consideration of scram indicators, rod position indicators, flux monitors, pressurizer level and pressure indicators, pressurizer relief valve and safety valve posi' ion indicators, coolant average temperature, containment temperature and pressure indicators, steam generator level, pressure and flow indicators, and any other alarms 8009030685

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s Mr. Glen L. Koester annunciated in the control room including alarms not processed through

'the electrical portion of the reactor scram system. The emergency operating procedure should be sufficiently simplified and unambiguous to permit prompt ATWS recognition.

2.

The emergency operating procedure should describe actions to be taken in the event of an ATWS including consideration of manually scramming the reactor by using the manual scram buttons, prompt actuation of the auxiliary feedwater system to assure delivery of the full capacity of this system, and initiation of turbine trip. These actions must be taken inmediately following the occurrence of the event. Actions should also include prompt initiation of boration by actuation of the high pressure safety injection system to bring the plant to a safe shutdown condition.

We require that you submit your ATWS emergency operating procedure. Our review may include a visit to your plant to determine the feasibility of implementing your proposed procedures through operator simulation of the steps. Our evaluation must conclude that an acceptable procedure and operator training are completed prior to the issuance of a full power operating license.

Sincerel.,

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/ &ca&& pn Robert L. Tedesco, Assistant Director for Licensing Division of Licensing cc: See next page a

I Mr. Glenn L. Koester Vice President - Operations Kansas Gas and Electric Comoany 201 North Market Street P. O. Box 208 Wichita, Kansas 67201 cc: Mr. Nicholas A. Petrick Ralph Foster, Esq.

Executive Director, SNUPPS Kansas Gas & Electric Company 5 Choke Cherry Road P. O. Box 208 Rockville, Maryland 20750 Wichita, Kansas 67201 Mr. Jay Silberg, Esquire William H. Ward, Esq.

Shaw, Pittman, Potts & Trowbridge MACEA 1800 M Street, N. W.

5130 Mission Road Washington, D. C.

20036 Shawnee Mission, Kansas 66205 Mr. Donald T. McPhee Ms. Treva Hearne, Assistant General Counse' Vice Presidnet - Production Public Service Commission Kansas City Power and Light Company P. O. Box 360 1330 Baltimore Avenue Jefferson City, Missouri P. O. Box 679 Kansas City, Missouri 64101 James T. Wiglesworth, Esq.

9800 Metcalf Suite 400 General Souare Center Overland Park, Kansas 66212 Mr. William H. Griffin, Esq.

Assistant Attorney General State of Kansas State House Topeka, Kansas 66612 Mr. John M. Wylie, II Energy Reporter Kansas City Star 1729 Grand Kansas City, Missouri 64108 Mr. Gary Haden Wichita Eagle and Beacon Box A-20 Wichita, Kansas 67201 a

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