ML13333A478

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Advises That Responses to NRC Requesting Info Re Small Break LOCA Guidelines Will Be Submitted by 800228. Bulletin Response Will Be Sent by 800228
ML13333A478
Person / Time
Site: San Onofre 
Issue date: 01/23/1980
From: Haynes J
Southern California Edison Co
To: Ziemann D
Office of Nuclear Reactor Regulation
References
IEB-79-27, TAC-44128, NUDOCS 8001290503
Download: ML13333A478 (2)


Text

Southern California Edison Company P. 0.

BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 January 23, 1980 Director, Office of Nuclear Reactor Regulation Attention: Mr. D. L. Ziemann, Chief Operating Reactors Branch #2 Division of.Operating Reactors U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Gentlemen:

Subject:

Docket No. 50-206 San Onofre Nuclear Generating Station Unit 1 By letter dated December 27, 1979 from D. F. Ross to C. Reed, the NRC requested that the Westinghouse Owners Group Utilities (1) provide documentation within 21 days showing the errors (and their source) used to develop their subcooling criterion, (2) document and justify any proposed revisions to Station procedures within 21 days if the calculated subcooling criterion does not permit timely termination of HPI for non-LOCA events, (3) acknowledge a commitment within 21 days to install instrumentation and readout devices which will provide 200 F of actual subcooling based on the criterion in the Station procedures, and (4) in conjunction with IE Bulletin 79-27, confirm that sufficient instrumentation is available on redundant emergency power supplies to permit the operator to perform the actions defined in the Station procedures. Based on our discussions with the Westinghouse.Owners Group, each Owner is expected to submit the requested information directly to the NRC.

The purpose of this letter is to advise you that we need additional time to provide the information requested in the NRC December 27, 1979 letter. We expect to submit the requested information discussed in Items 1, 2 and 3 above by February 15, 1980. The requested information discussed in Item 4 above will be submitted by February 28, 1980 as part of our response to IE Bulletin No. 79-27.

8012 9 0 C

eI Mr. D.

January 23, 1980 If you have any questions concerning our rescheduled submittal date, please contact me.

Very truly

ours, J. G. Haynes Chief of Nuclear Engineering