ML19256E831

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Forwards Info Re Presence of Noncondensible Gases within RCS Following Small Break LOCA
ML19256E831
Person / Time
Site: Rancho Seco
Issue date: 11/05/1979
From: Mattimoe J
SACRAMENTO MUNICIPAL UTILITY DISTRICT
To: Ross D
NRC - TMI-2 BULLETINS & ORDERS TASK FORCE
References
NUDOCS 7911150341
Download: ML19256E831 (2)


Text

I esuun SACRAMENTO MUNICIPAL UTILITY DISTRICT C 6201 s streat, Box 15830, sacramento, California 95813; (916) 452-3211 November 5, 1979 Mr. D. F. Ross Jr., Director Bulletins and Orders Task Force Office of Nuclear' Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.

2000o Docket No. 50-312 Rancho Seco Nuclear Generating Station Unit No. 1

Dear Mr. Ross:

The Sacramento Municipal Utility District herein forwards information regarding the presence of non-condensable gases within the reactor coolant system following a small break LOCA. The information was required by item 3 of Attachment A to Enclosure 1 of your August 21, 1979 letter.

This letter also conveys information related to other outstanding items to Attachment A of Enclosure 1 to your August 21, 1979 letter:

Item 1A CRAFT Analysis with Sequential AFH flow 12-11-79 Item 2B Repressurization to PORV setpoint with PORV then sticking open Qualitative Assessment B&W is reviewing their capability to provide a qualitative assessment without supporting detailed analysis Detailed Analysis 2-11-80 Item 5 Semi-scale experimental prediction Submitted to the NRC Staff by B&W on 10-9-79 y

ft yOvfo 1335 059 7911150 N /

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1 Mr. D. F. Ross Jr. November 5, 1979 Item 6 LOFT pretest predictions Currently being negotiated by direct B&W/NRC Staff interactions If you have additional questions concerning this submission, please contact us.

Sincerely, n n f btb LL. M s.

,- g b i

John J. Mattimce Assistant General Manager and Chief Engineer 1335 060