ML19329D975

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Forwards Info Re Facility Shutdown Effect on Northern CA Electric Capacity Margins in Response to NRC Request. Provides Estimated Electric Capacity Margins W/& W/O Addl Purchases from Neighboring Utils
ML19329D975
Person / Time
Site: Rancho Seco
Issue date: 04/24/1979
From: Braun H
SACRAMENTO MUNICIPAL UTILITY DISTRICT
To: Harold Denton
Office of Nuclear Reactor Regulation
Shared Package
ML19329D971 List:
References
NUDOCS 8004080993
Download: ML19329D975 (1)


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02072 SANFRANCISCO CA 166 04-24 1037A PST 5o 3I

?MS HAROLD DENTON, DIRECTOR OF LICENSING, DLR NUCLEAR REGULATORY COMMISSION 1717 H ST NORTHWEST O

WASHINGTON DC O

THE FOLLOWING INFORMATION RESPONDS TO YOUR REQUEST AS TO THE O

EFFECT UPCU NORTHERN CALIFORNIA ELECTRIC CAPACITY M ARGINS IN THE O

EVENT THAT THE RANCHO SECO UNIT IS SHUTDOWN THIS SUMMER. THE O

DATA WAS REVISED TODAY c4/23) FROM THAT PREVIOUSLY FURNISHED TO O

THE CALIFORNI A ENERGY COMMISSION AND THE CALIFORNIA PUBLIC O

UTILITIES COMMISSION TO REFLECT THE FORCED OUTAGE OF THE 108 MW I

CONTRA COSTA UNIT No.1, WHICH OCCUc RED ON APRIL 21, 1979 AND WHICH WILL EXTEND AT LEAST THROUGH THE SUMMER MONTHS. NOR THER N CALIFORNI A AREA C APACITY MARG INS, WITHOUT ADDITIONAL PURCHASES FROM NEIGHBORING UTILITIES AND WITHOUT RANCHO SECO, ARE ESTIM ATED SF 1201 (R5-69)

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O To eE AS FOLLOWS:

O MAY 2.48-0/0 July 0.98-0/0 0

JUNE 5.S-0/0 AUGUST 1.07-0/0 O

G ASSUMING THAT WE PURCHASE ALL C AP ACITY NOW ESTIM ATED TO BE O

O AVAILABLE FROM NEIGHBCRING UTILITIES, AREA M ARGINS ARE ESTIM ATED TO BE:

O MAY 4.43-0/0 JULY 3.3-0/0 I

JUNE S.6-0/0 AUGUST 3.4-0/0 THESE MARGINS ARE CLEARLY INSUFFICIENT TO PROTECT AG AINST ANY

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ADDIT IONAL FORCEE OUT AGES, AND IF LOADS ARE AS FORECASTED WE C r.1 1 (R$-69)

-O WOULD ?E REQUIRED TO IMPLEMENT CUSTOMEP LO AD CURTAILMENT "O

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