ML13303A710
| ML13303A710 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/30/1979 |
| From: | Rood H Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7907180694 | |
| Download: ML13303A710 (7) | |
Text
MAY 30 1979 DOCKET NOS. 50-31
/1 AND 50-362 APPLICANTS:
SOUTHERN CALIFORNIA EDISON COMPANY SAN DIEGO GAS AND ELECTRIC COMPANY FACILITY:
SAN ONOFRE NUCLEAR GENERATING STAfIN, UNITS 2 AND 3
SUBJECT:
SUMMARY
OF MEETING TO DISCUSS INTERPRETATION OF SEISMIC PROFILES On May-4, 1979,. representatives of the applicants met with members of the, NRC staff-in Bethesda, Maryland to discuss the.above subject. Attendees at the meeting are given in Enclosure 1.
At the meeting, the applicants presented and discussed a number of seismic reflection profiles which they had used as the basis for their response to NRC staff Question 361.34. The-applicant's position is that the Offshore "E" fault near the San Onofre site is not a continuous fault but a series of enechelon anticlines and synclines. At the meeting, the applicants provided the staff with a copy of a letter from one of their consultants which supports their posi tion (see Enclosure 2).
The applicants agreed to provide on the docket line drawings interpretating the seismic profiles which form-the basis for their position on the Offshore "E" fault.
Original Signed bY cod Harry Rood Light Water Reactors Branch No. 2 Division of Project Management
Enclosures:
- 1. Attendance List
- 2. Letter From Consultant ccs w/enclosures:
See next pages
- R=:
a
....H Road:.a.b...
RL ae...............
DATE..5.
7 79.........
1C FORM 318 (9-76) NRCM 0240 u.S. GOVERNMUNT PRINTING OPPICE: 1978 -245 769
Mr. James H. Drake Vice President MAY 30 g 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 Ga.s
& 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
Mr. James H. Drake Mr. B. W. Gilman MAY 3 0 1979 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.
4655 Cass Street, Suite 304 San Diego, California 92109 Phyllis M. Gallagher, Esq.
Suite 220 615 Civic Center Drive West Santa Ana, California 92701 Mr. Robert J. Pate United States Nuclear Regulatory Commission P. 0. Box 4167 San Clemente, California 92672 4-P
ENCLOSURE 1 MAY 3 0 1979 ATTENDANCE LIST GEOLOGY DISCUSSION SAN ONOFRE 2/3 MAY 4, 1979 SCE M. 0. Medford H. G. Hawkins D. G. Moore (Consultant)
NRC -
STAFF H. Rood L. J. Chandler A. T. Cardone P. Sobel
ENCLOSURE 2 9440 La SA Shores Drive La Jolla, California 92037 July 7, 1978 Mr. Gale Hunt Supervising Engineer Southern California Edison Company P. 0. Box 800, 2244 Walnut Grove Avenue Rosemead, California 91770
Dear Gale:
I am enclosing the brief report which Greg and I have prepared covering our evaluation of "Fault E" as based on our interpretation of the most recent sparker and "acousti-pulse" data of the Woodward/Clyde LGN site surveys.
The close-spaced lines (800-1500 feet apart) of this new data have allowed a much more actualistic interpretation of this north-northwest trending zone of structural deformation.
Under separate cover, I am also sending our preliminary structural map based on the recent interpretations and combined with the interpretations which I made several years ago from data available at that time.
We first worked only with the new close-spaced data and, after mapping from that, combined the re sults with my earlier interpretations.
It is significant, I believe, that the large faulted aniticline/syncline combination depicted earlier as, continuous through line S-22 from S-16, now appears to be absent at lines 145 and 147 of the new Woodward/Clyde data. There are now defined two separate anticline/
syncline pairs on the outer shelf that are connected by faulting clearly shown on lines 845 and 847 as well as on old line S-8.
The structures of this outer shelf zone of deformation off the plant site are beginning to look more like the style of deformation (but not the scale) of the Newport-Inglewood zone in the Los Angeles Basin.
Enclosed also are statements for the time that Greg and I have spent in inter pretation and coasultation for this study. We would appreciate 'having two separate checks for this work, one for D. G. Moore and one for G. F. Moore.
I have enjoyed seeing you and working with you and your group again. I hope that our efforts will help clarify the nature of the offshore structure to allow best decisions on your part.
regard Dave Moore
July 7, 4 Evaulation of "Fault E" A north-northwest-trending zone of disturbance approximately five miles in length was recognized by marine advisors and named "Fault E."
Based on the original data set, which had line spacings of 2,000 to 7,000 feet, the structure was inter preted to be a continuous fault. New data with line spacings of 800 to 1500 feet clearly indicate that the feature is not a continuous fault but rather is a dis continuous zone of deformation associated with an anticline-syncline pair.
The new data (Woodward/Clyde sparker and "acousti-pulse") supports the original interpretation that the feature dies out to the south.
It first appears on line 812 as the faulted limb between an anticline and syncline. On lines 814 and 816 the anticlinal crest is faulted along its seaward margin. On lines 818 825 the limb between the anticline and syncline is faulted. This structure is best seen on line 825 which shows a well-developed anticline and syncline between points 123 and 130 with a faulted limb between points 126 and 127. Line 828 shows a broad zone of deformation up to 1500 feet wide. A well-developed anti cline and syncline with only minor disturbance of the limb between them is dis played on line 830. On lines 834-845 the synclinal axis is faulted. The faults, anticlines and synclines appear to be en-echelon features.
The faulted anticline-syncline structure is clearly truncated by a Pleistocene erosional surface. The surface is well-displayed on the high resolution "acousti pulse" records that were obtained simultaneously with the sparker records. The erosional unconformity is overlain by.01-.015 seconds (8-12 meters) of undisturbed post-Pleistocene sediments.
In summary, the feature previously termed "Fault E" is not a continuous fault, but is a series of en-echelon anticlines and synclines with associated discontinuous faults.
D. C. Moore G. F. Moore
Meeting Summary-:
Docket File J. Knight NRC PDR S. Hanauer Local PDR R. Tedesco TIC R. Bosnak NRR Reading S. Pawlicki LWR #2 File F. Schauer E. Case K. Kniel D. Bunch T. Novak R. S. Boyd Z. Rq ztoczy D. F. Ross W. Butler D. B. Vassallo V. Benaroya D. Skovholt R. Satterfield W. Gammill V. Moore J. Stolz M. Ernst R. Baer F. Rosa
- 0. Parr R. Denise S. Varga EP Branch Chief C. Heltemes G. Chipman W. Haass J. Collins R. Houston W. Kreger L. Crocker G. Lea;'
D. Crutchfield B. Youngblood F. J. Williams L. Hulmhan R. J. Mattson NRC
Participants:
R. DeYoung L. J. Chandler Project Manager - H. Rood A. T. Cardone Attorney, ELD P. Sobel J. Lee IE(3)
ACRS(16)
R. Denise L. Rubenstein