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Pobruary 25,196k er.
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s-d Eenorab3n Glenn T. Seaborg d
Chairman l6~
U. 8. Atomia Energr Cansdssian l.
Weshington, D. C.
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., Subject SEIBMIC DESIM CF BUCIEAR POWER PLANTS
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Dear Dr. Seeborg's
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I P-The guestian of appropriate selsde design of nuclear power plants
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has resently esenpf ta h uttention of the Advisory Cosetttee en e
L, Beactor Safeguards. Most of this study has been ealled for because y
of proposals to sonstruet unclear power plants in seismically actiw 1y senes. There have, heuver, also;been.guestians relatin to plants L-to be built in regions ukere seismie activity is low er where h l
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.eeisnio history is besea en 1sacertain doeusentation of earth movement' that took plane lang ago..
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1y h Committee believes,that, especial 1F in, esses of W 1atter kind,
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useertsiaties tu W geology or h seisats,ity may eause a trend
'13 toward shoosing design methods or design parameters with mon een-gF servatism ha is meesssary Adeguate seisnie design guides that
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provide protection eenparable with that provided by other safety j
j finatures of muelear pisats are needst.
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Before seisnie design guides er parsmaters are adopted for sones of relative seismie gaiet, h Committee suggests further eensideration l
of the guestion of earthquake probability and magnitude for these
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Sincerely yours, d
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/s/ Herbert Kouts.5gg
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For information.
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, g 40UTE SUP Gev. MSF 14.1947)
Nste and return.
For signature.
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To (Name and unJt) fMITIALS
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R WARKS B
At my requeste Williamson has written the attached
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report in response to the ACRS letter (attached) on i
seismic design criteria. I think it would be a
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M 71ALS RMARKS appropriate to send his report to the ACRS for oArc -
information. Do you agree?
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1 To (N.me.nd un,0 R-.
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PHONE feCL DATI Th11 5/12
.s USE CffHER $10E FOR ADDITIONAL RMARKS SP0 eM 36 7799 e 1
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