ML16340A834
| ML16340A834 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 01/21/1980 |
| From: | Mcmullen R Office of Nuclear Reactor Regulation |
| To: | Rolonda Jackson Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML16340A836 | List: |
| References | |
| NUDOCS 8003140459 | |
| Download: ML16340A834 (4) | |
Text
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1p rJr.'I r r 0 Sl'<'~ I F.S fi'Ur.r. Iih!3 I I L'r3UI.AI'OBY COf'rI'nlSS ION
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+5 <rriGToN, o. c. 20555 January 21, 1980
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E, Jac kson, CI'lcf'l1 erl Cieol ogi st Geoscl erices Bl anch DSS NEM SEISI'1IC RFFI.ECTIOH DATA RFGARDIHG Sl'RUCTURAL RFI Al'IONS OF 0!:I'Sf!ORE I XTEtxSIOI>S OF THE SAN SIIIEOH FAULT 70NE On January 16, 1980, I was made awave of an abstract presented in the EOS. Yol. tio. 46, November 13, 1979 entitled "Continuity and Recency of flovement orl Offshore Extensions of the San Simeon Faul't 7one, Central California," by R.
B. I.esley, of the University of California, Santa Cruz.
The abstract presents the autflov's interpretation of seisriiic reflection pvofiling data taken in shallow vial.. r across southein extensions of the San Siriieon.<ault xorle.
Ilr. I.esley irltc<piets tl. <I;<ta to shoW that the San Siri.,"orl arll't ccn
!le traced a;;.r oxii ately 10
!;rn so><f.<rcab,ward
'<'I'om San Simeon
<<".ay::frere it joirls a stvari<i of ttle:osgri "lult zone.,'fe also intevpvets the vecor ds as shoviing evidence for faulting of post-'llisconsirlan sediments (less than 20,000 years old).
I called Jim Devine of 1.he U.
S. Geological Survey (USGS),
who in turn contacted the USGS office in I'enlo Park, Calif.
hr.
Devine in<dicated that a marine <'eologist at I'<erllo park;ho had seen the data, believes tllat the records ai"e good and sees rio rr<ason to disagree with I.esley's interpre-tationn at
't.'he p<.serlt tii<le, fir. Devine also said that this nevi data does not change the USGS's conclusion i"egal ding the maximum earthquake on the Hosgri faul t zone because a
possible connection between tl<ese two faults at depth had been assumed in their analysis.
Regarding post-'Misconsinan offsets, the Applicant had earlier mapped post-Visconsinan offset viithin the San Simeon fault system onshore.
In its safety evaluation of the Diablo Canyon site, the HRC accepted the USGS's recom.nen<iation regarding the SSF., thevefore, we see no i.cason to alter our conclusion that the assumption of the occurrence of a 7.5 r;ag>>itude eavthq<<af;e on the Hosgvi f ult at its closest approach to the site is appropv <a
< ely cons':< vative
~
R.
B. hct1ullen, Geologist Geol o gy and Sei smo 1 o gy Secti on Geosciences Branch Division of Systems Safety 8'008'0
BOARD NOTIFICATION DISTRIBUTION
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BN 80-6 Diablo Can on - Docket No. 50-275, 3230L Atomic Safety and Licensing Atomic Safety and Licensing Docketing
& Service Section Apfelberg, Elizabeth Baldwin, Andrew Bowers, Elizabeth S.
Bright, Glenn 0.
Brown, Herbert H.
Buck, John H.
Crane, Jr., Philip A.
- Eissler, Frederick Fleischaker, David S.
- Fleming, Raye Gehr, Arthur C.
- Hubbard, Richard B.
- Johnson, W. Reed
- Jones, Yale I.
Kerr, Janice E.
Klein, J. Anthony Marrs, John Martin, William E.
Moore, Thomas S.
Norton, Bruce Phillips, John R.
- Salzman, Esq.,
Richard S.
- Schuyler, James 0.
Silver, Gordon Silver, Sandra A.
Valentine, Paul C.
ACRS Members Board Appeal Board
- Bender, Myer
- Carbon, Max W.
- Ebersole, Jesse C.
Etherington, Harold Kerr, William Lawroski, Stephen Lewis, Harold W.
Mark, J.
Carson Mathis, William M.
Moeller, Dade W.
Okrent, David
- Plesset, Milton S.
Ray, Jeremish J.
- Shewmon, Paul G.
- Siess, Chester P.
- Smith, Roger