ML19321A730
| ML19321A730 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 07/11/1980 |
| From: | Walbridge W SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8007240123 | |
| Download: ML19321A730 (1) | |
Text
gSMUD sACPAMENTO MUNICIPAL UTILITY oisTRICT O 6201 s street, Box 15830, sacramento, Califomix 95813; (916) 452-3211 July 11, 1980 Director of Nuclear Reactor Regulations Attn: Mr. Robert W. Reid, Chief Operating Reactor Branch 4 U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Docket No. 50-312 Rancho Seco Nuclear Generating Station, Unit No.1
Dear Mr. Reid:
Your letter of November 19, 1979, requested additional infor-mation on Containment Purge and Vent Systems and contained six items.
M District responded to Items 1, 2, 3, 4, and 5 in ou. January 24, 1980 l e i.te r.
The purpose of this letter is to complete our response by answering Item No. 6.
Item No. 6 requested the following information:
" Provide an analysis of the reduction in containment pressure resulting from the partial loss of containment atmosphere during the accident for ECCS backpressure determination. "
This analysis may be found in Section 14.3.8.2 of the F5AR. The analysis shows that only 1/300 of the containment atmosphere would be released thould a LOCA occur during a reactor building purge. The containment pressure reduction is directly proportional to the amount of containment atmosphere released. The containment pressure for ECCS backpressure determination is
.therefore reduced by 1/300.
If you have any questions, please contact Larry Smith on (916) 452-3211, extension 621.
Sincerely, Wm. C. Walbridge g
General Manager
/b A fd ELECTRIC SYSTE M 3 E RVI N G MORE THAN 500,000 IN THE HEART OF C A LI F0 R N I A S$0
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