ML20235B037

Earthquake Hazards at Proposed Bodega Head Reactor

ML20235B037
Person / Time
Site:	05000000, Bodega Bay
Issue date:	08/14/1964
From:	Steinbrugge K AFFILIATION NOT ASSIGNED
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References
FOIA-85-665 NUDOCS 8709230506
Download: ML20235B037 (16)

Text

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DRAFT REPORT

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EARTHQUAKE HAZARDS .Fdy Co;m '/ l PROPOSED EODEGA ESAD REACTOR ,

Karl V. Steinbrugge i!

GEOLOGIC CONSIDERATIONS Proximity to the San Andreas Fault:

4 The earthquake engineering design has to consider the proximity of the San .

Andreas fault in addition to potential movement on auxiliary faults (such as the Shaft fault). The location of the facility is generally agreed to be about 1,000 feet west of the west edge of the San Andreas fault zone;' this zope is about 1-1/2 miles wide *here.

The surface faulting in the 1906 earthquake took place near the eastern side of the zone. -

There is more than ample evidence from observations made in many earth-quakes that certain types of man-made structures can survive with little or no damage I when not astride the fault break. The author has extensively field studied the 1959 Hebgen Lake carthquake, and other earthquakes wis surface faulting, having this j

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problem in mind. There are differences of opinion among engineers regarding the . . . .

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amount of the earthquake design force, but not whether a structure can success' fully

• I resist earthquake forces adjacent to a fault.

Shaft Fault:

. The numerous extensive reports by the U. S. Geological Survey and the  !

l Pacific Gas and Electric Company dealing with the Shaft fault and the site bedrock are

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based on the same observed data, but these studies reach rather opposing conclusions. l 8709230506 B51217 -

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. The U. S. Geological Survey concluded, in a draft abstract dated May 7,1964,

.that the expected total displacement in any direction in the event of an 8. 5 magnitude .

earthquake with its epicenter at Bodega would be in terms.of the following: ,

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