ML20234F443

Informs That by End of Wk,All Modified Illustrations to Be Completed.Forwards Results on El Centro Analysis,Per Discussion of Resultant Accelerations & Velocities at Last Meeting.Illustrations to Be Included in Final Rept

ML20234F443
Person / Time
Site:	05000000, Bodega Bay
Issue date:	07/10/1963
From:	Neumann F WASHINGTON, UNIV. OF, SEATTLE, WA
To:	Bryan R US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
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 8709230123
Download: ML20234F443 (3)

Text

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dg 121963m Ama July 10, 19 Lf4 j g %rTTGV Dr. Robert H. Bryan, '

Division of Licensing and Regulation, U. S. Atonio Energy Commission, Washington 25, D.C.

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Dear Dr. Bryan:

This is a kind of progress report. By the end of this week I expect to have all of the modified illustrations comt plated; it is a tedious and time consuming job. I have looked further into the magnitude-intensity relationship and, in place I of the simple relationship suggested by Gutenberg-Richter, have come up with a much more informative type of chart which will do as much as anything else to prove that the epicentral intensity in 1906 was n-10 rather than anything less. . ]

1 I have not had time to review the paper {passed out by Hous- ]

nor and Tocher at the Argonne Laboratory but hope to do so as j soon as the illustrations are finished. .

In connection with the discussion of resultant accelerations j and velocities at the last meeting there are onolosed some results l 1

that I published in the 1940 Seismological Report of the Coast j and Geodetic Survey on the El Centro andysis. This solution did 1 l not take into account the fact that there was some permanent dis-placement during the first few seconds of recording but I do not

- think this would make much difference in the over all picture. l Perhaps this illustration should be included in my final report.

Eineerelyyou2s, .

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Frank Neumann.

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The rc= ult. int <//,pla ru,,ut graph ir rhown in figure W for a perinit of 29 seconil< nud a timed in the saine uninner as the two preceding uraphs. A mmewhat more preti* rercion of this graph for the Erst 12 seconds in shown in the original rep .rt. Figure w shim the h kh l

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ima. of the major displacements rather than details needed to make eparison studw of the various graphs.

W maximum displacement is about 21 centimeters. The period is we shown on the longitudinal component and may be taken as 3.2

-unds. The corresponding velocity would le about 42 cm./sec.

mhich ties in well with the general range of velocities at the start of

} the resultant velocity curw. The corresponding acceleration would be about 80 cm. This is about one. fourth ihe amplitude of the 5  ; euperposed shor/sec."t period accelerations inspection of the acceleration curves. , a ratio which is borne out by

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!2" Fertical motion.-No attempt was made to combine the vertical motion with the horizontal to determine the natun of the vertical 1 - motion relative to the horizontal. An inspection of the noceleration l moord shows little tendency for the period to deviate widely from 0.10 second.. In the early part cf the mcord there are a number of I

turning points indicating periods u low as 0.03 second but they' seem insigmficant. The maximum vertical sooeleration 0.8 second after the start of the moont is about 990 cm.

period of 0.109 second. Freen the res/sec.8, and is,neociated with a ultant horizontal acceleration graph it will be noted that this occum while the horisontal semiera.

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