ML13303A739

Summary of 790913 Meeting W/Utils,Usgs & CA Div of Mines & Geology in Menlo Park,Ca Re Rept on Evaluation of Max Earthquake & Site Ground Motion Parameters Associated W/Offshore Zone of Deformation

ML13303A739
Person / Time
Site:	San Onofre
Issue date:	11/05/1979
From:	Rood H Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 7911120499
Download: ML13303A739 (7)

Text

POCKET NOS.

ND AND 60-362 APPLICANTS: SOUTHERN CALIFORNIA EDISON COMPANY SAN DIEGO GAS AND ELECTRIC COMPANY FACILITY:

SAN ONOFRE NUCLEAR GENERATING STATION, UNITS 2 AND 3

SUMMARY

OF SAN ONOFRE SEISMOLOGY MEETING On September 13, 1979, the NRC staff met with the applicants, the United States Geological Survey (USGS), staff consultant Dr. David Semmons, and the California Division of Mines and Geology (CDMG) in Menlo Park, California. Attendees at the meeting are given in Enclosure 1.

The purpose of the meeting was to discuss the Woodward-Clyde report, nReport on the Evaluation of Maximutm Earthquake and Site Ground Motion Parameters Associated with the Offshore Zone of Deformation, San Onofre Nuclear Generating Station," June 1979.

The meeting agenda is given in Enclosure 2.

Following the applicant s presentation, the following areas were identified where the NRC staff, the USGS, and CDMG have questions and concerns about the material presented in the Woodward-Clyde report.

1. Concerns about the validity of the concept underlying the slip-rate vs. magni tude correlation proposed in the Woodward-Clyde report: What is the theoreti cal basis for such a correlation? Why-are dip-slip earthquakes having large magnitudes.and small slip rates.(such as 1915 Pleasant Valley, Nevada and 1976 Tang Shan, China) not included? Is the apparent correlation an arti fact of the limited historical observation interval and the lower seismicity of faults having relatively small slip rates? How does this method compare with alternate methods of determining magnitude (such as the fault-length method?

2. Concerns about the specific slip-rate vs. magnitude correlation proposed:

What were the criteria for selecting the earthquakes used in the correlation?

Why are data from the Bocono, Wairarapa, and Magellenas faults not included in the correlation? What uncertainty bands are associated with each point in the correlation? Uncertainties in magnitude and slip rate should be con sidered. Are all the slip rate values taken over comparable, recent time periods (since slip rates may vary over geologic time)?

3. Concerns about the proposed.attenuation model used in propagation of the seismic motion'from the fault to the plant site: What is the basis for the value used for the constant "C" in the attenuation equation? Why was the method described in USGS Circular 795 not used?

How does the'attenuation model used account for "focussing" effects which may occur in the near field?

OFFICE SURNAME 7911120 DATE

'NRC FORM 318 (9-76) NRCM 0240

• U.S.

GOVERNMENT PRINTING OFFICE: 1979-289-369

wOV 05 g

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4. Other questions and concerns: Was the Coronado Banks fault considered in the Woodward-Clyde report?

Wereany studies done connecting the Offshore Zone of Deformation/Rose Canyon fault with faults in Mexico such as the San'Miguel. Have 19th century data based on recent translations of Spanish data been evaluated? Has.the 1812 Santa Barbara earthquake been evaluated (Ref: CDMG open file report OFR 79-6 SAC)?

At the conclusion of the meeting the staff stated that its target date for for fal issuance of its concerns and questions to the appli cants was mid-October.

Harry Rood Light Water Reactors' Branch No. 2 Division of Project Management

Enclosures:

1. Attendance List

2. Agenda ccs w/enclosure:

See next pages OFFICE

,- DPM:LUR. #2.......DPM:LWR. #2......................................

SURNAME....HRod:ab.RLBaer.................................................

DATE....

.9 NtC FORM 318 (9-76) NRCM 0240

• U.S.

GOVERNMENT PRINTING OFFICE: 1979-289-369

Mr. James H. Drake Mr. B. W. Gilman cc:

Mr. R. W. DeVane, Jr.

Combustion Engineering, Inc.

1000 Prospect Hill Road Windsor, Connecticut 06095 Mr. P. Dragolovich Bechtel Power Corporation P. 0. Box 60860, Terminal Annex Los Angeles, California 90060 Mr. Mark.Medford Southern California Edison Company 2244 Walnut Grove Avenue P. 0. Box 800 Rosemead, California 91770 Henry Peters San Diego Gas & Electric Company Post Office Box 1831 San Diego, California 92112 Ms.

Lyn Harris Hicks Advocate for GUARD 3908 Calle Ariana San Clemente, California 92672 Richard J. Wharton, Esq.

Warton and Pogalies 2667 Camino Del Rio South Suite 106 San Diego, California 92108 Phyllis M. Gallagher, Esq.

1695 West Crescent Avenue Suite 222 Anaheim, California 92701 Mr. Robert J. Pate United States Nuclear Regulatory Commission P. 0. Box 4167 San Clemente, California 92672 Mr. A. S. Carstens 2071 Caminito Circulo Norte Mt.

La Jolla, California 92037

Mr. James' F. Drake Vice President Southern California Edison Company 2244 Walnut Grove Avenue P..0. Box 800 Rosemead, California 91770 Mr. B. W. Gilman Senior Vice President - Operations San Diego Gas and Electric Company 101 Ash Street P. 0. Box 1831 San Diego, California 92112 cc:

Charles R. Kocher, Esq.

James A. Beoletto, Esq.

Southern California Edison Company 2244 Walnut Grove Avenue P. 0. Box 800 Rosemead, California 91770 Chickering and Gregory ATTN: David R. Pigott, Esq.

Counsel for San Diego Gas

& Electric Company and Southern California Edison Company Three Embarcadero Center, 23rd Floor San Francisco, California 94112 Mr. Kenneth E. Carr City Manager City of San Clemente 100 Avenido Presidio San Clemente, California 92672 Alan R. Watts, Esq.

Rourke & Woodruff 1055 North Main Street Suite 1020 Santa Ana, California 92701 Lawrence Q. Garcia, Esq.

California Public Utilities Commission 5066 State Building San Francisco, California 94102

NOV 0 5 ENCLOSURE 1 ATTENDANCE LIST MEETING ON EARTHQUAKE POTENTIAL AT SAN ONOFRE SEPTEMBER 13, 1979 H. Rood -

NRC R. Sadigh - WCC Earthquake Engineer S. Tan - CDMG K. Baskin - SCE P. Y. Amimoto - CDMG W. C. Moody - SCE T. Cardone - NRC M. D. Medford -

SCE P. Sobel - NRC H. M. Ewoldsen -

WCC J. McGurren - NRC P. West - SCE J. McNey - SCE B. Slemmons -

University of Nevada

0. J. Ortega - SCE Reno - Consultant for NRC A. S. Carstens -

Friends of the Earth W. B. Joyner -

USGS A. Baldwin -,Friends of the Earth D. J. Andrews -

USGS J. Frazier - TERA/DELTA - SCE P. L. Ehlig - SCE -

Consultant P. Somerville - WCC - San Francisco P. D. Guptill - WOC - Geologist S. Casey - Chickering and Gregory H. Peters - SDG&E D. R. Pigott -

Chickering and Gregory D. H. Hamilton - E. S. A.

W. G. Hawkins -

SCE V. J. Ghio - PG&E G. Quittschreiber - ACRS - NRC L. Wight - TERA Corporation W. U. Savoye - WCC D. G. Moore - SCE K. McNally - WCC -

Consultant G. Barlow -

FOE D. Hadley - Sierra Geophysics R. C. Sholes -

SCE R. L. McNeill - SCE - Consultant J. L. Smith - SCE - Consultant S. W. Smith - Consultant - SCE S. R. Brockman - USGS J. A. Barneich -

WCC -

Engineer J. Devine - USGS E. G. Heath -

Woodward-Clyde Consultants

ENCLOSURE 2 MEETING WITH NRC GEOSCIENCES BRANCH SAN ONOFRE NUCLEAR GENERATING STATION UNITS 2 AND 3 September 13, 1979 I. Introduction/Meeting Objectives K. P. Baskin 5 min II.

Assignment of Magnitude to Offshore Zone of Deformation A. Methodology W. Savage 5 min

1. Maximum Magnitude

2. Ground Motion Parameters B. Geologic Relationships E. Heath 10 min

1. Regional Tectonics

2. Tectonic Model for OZD C. Historical Seismicity and Slip Rate vs Magnitude W. Savage 10 min D. Analysis of Slip Rate and Magnitude Data E. Heath 15 min E. Summary of Results of the Maximum Magnitude for OZD H. Ewoldsen 10 min III.

Demonstration of Conservatism of Design Response Spectrum A. Development of Maximum Instrumental Ground Motion Paramenters K. Sadigh 15 rin

1. Attenuation of Ground Motion

2. Calculated Peak Instrumental Acceleration and Spectral Values B. Comparison of Calculated Instrumental Spectra and DBE Spectrum R. McNeill 10 rin

1. Graphic Comparison

2. Severity of DBE IV.

Summary of Geoscience Design Basis S. Smith 10 min V.

Questions and Answers As Needed As Required VI.

NRC Summary of Review Results As Required LUNCH BREAK VII.

Open Discussion Items As Needed As Required VIII.

Conclusions K. P. Baskin 5 min Meeting Summary Docket File,/"

T. Murphy NRC PDR J. Knight Local PDR S. Hanauer TIC R. Tedesco NRR Reading R. Bosnak LWR #2 File S. Pawlicki E. Case F. Schauer D. F. Ross K. Kniel D. B. Vassallo T. Novak S. A. Varga Z. Rosztoczy D. Skovholt W. Butler W. Gammill V. Benaroya J. Stolz R. Satterfield R. Baer V. Moore

0. Parr M. Ernst L. Rubenstein F. Rosa C. Heltemes R. P. Denise W. Haass EP Brahch Chief R. Houston G. Chipman L. Crocker J. Collins F. J. Williams W. Kreger R. J. Mattson G. Lear R. DeYoung B. Yodngblood Project Manager H. Rood L. Hulman Attorney, ELD -L. Chandler NRC

Participants:

J. Lee P. Sobel IE(3)

J. McGurren ACRS(16)

G. Quittschreiber