ML20234D805

Draft Notes on Seismic Questions on Proposed Bodega Reactor Site

ML20234D805
Person / Time
Site:	05000000, Bodega Bay
Issue date:	03/25/1964
From:	Beck C US ATOMIC ENERGY COMMISSION (AEC)
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ML20234A767	List: IA-85-665, Discusses Seismic Design of Nuclear Power Plants,Including Const of Nuclear Plants in Seismically Active Zones ML20234A761 ML20234A769 ML20234A792 ML20234A798 ML20234A803 ML20234A812 ML20234A816 ML20234A827 ML20234A830 ML20234A838 ML20234A841 ML20234A844 ML20234A847 ML20234A851 ML20234A855 ML20234A858 ML20234A861 ML20234A864 ML20234A868 ML20234A871 ML20234A874 ML20234A893 ML20234A896 ML20234A900 ML20234A911 ML20234A922 ML20234A929 ML20234A932 ML20234A937 ML20234A944 ML20234A956 ML20234A965 ML20234A968 ML20234A976 ML20234A984 ML20234A993 ML20234A996 ML20234A999 ML20234B005 ML20234B008 ML20234B023 ML20234B032 ML20234B035 ML20234B040 ML20234B062 ML20234B066 ML20234B076 ML20234B084 ML20234B098 ... further results
References
FOIA-85-665 NUDOCS 8709220198
Download: ML20234D805 (2)

Text

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DRAFT 3/25/64  :

Clifford K. Beck-  !

_ NOTES ON SEISMIC QUESTIONS ON THE PROPOSED 30DEGA REACTOR GITE

1. The proposed Bodega reactor site is in a seismically active area.

Should an earthquake occur, hazard to a nuclear plant would arise from (a) vibrations and shaking effects transmitted through the earth l

to the plant structures d cause damage unless appropriate protection b

is included in plant design; (b) a fault, or differential ground motion l i

under the plant foundations,could cause shear or torsion damages unless appropriate protection is provided in advance. It appears at present  ;

that appropriate design protection to prevent serious damage can be l li provided against expected vibrational effects, but can be provided against faulting only if relatively small (less than"10 or 12") offsets occur. 3 It is necessary therefore to obtain the best available information )

and judgment on the vibrational effects and the possibilities and j magnitude of faulting likely to occur in future earthquakes. 1

2. The best guide prediction of future earthquake phenomena appears to be the record of earthquake phenomena in the recent (geologic) past.

3. What is the history of earthquakes along San Andreas? What is the cause  ;

of the earthquakes? What happens during a major San Andreas earthquake... I vibration, faulting within and outside the fault zone? Should earthquakes larger than the 1906 be considered likely?

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4. What vibrational patterns should be expected at the proposed plant site in case of another 1906 type earthquake having its highest intensity -

directly opposite the site? Accelerations? Periods? Effect of ground composition 8709220198 851217 ES -665 PDR

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'5. In case of another 1906 type earthquake, what faulting pattern and location would be expected: (a) within the San Andreas fault zone?

(b) outside the fault zone and at the proposed site in particular?

Significance of Inverness and Mt. Wittenberg events in 1906, relative to the situation and earthquake experience at Bodega? 1 likely magnitude of' faults under the foundations of the proposed plant. 3 i

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