ML20147C109
| ML20147C109 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 02/03/1997 |
| From: | Fields M NRC (Affiliation Not Assigned) |
| To: | Ray H SOUTHERN CALIFORNIA EDISON CO. |
| Shared Package | |
| ML20147C112 | List: |
| References | |
| 2.206, NUDOCS 9702050303 | |
| Download: ML20147C109 (4) | |
Text
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February 3, 19971 4 Mr. Harold B. Ray i
Executive Vice President Southern California Edison Company San Onofre Nuclear Generating Station P. O. Box 128 1
e i
San Clemente, California 92674-0128
SUBJECT:
REQUESTFORGEOLOGICALANDSEISMICINFORMATIONFORIHESANON0FRE NUCLEAR GENERATING STATION
Dear Mr. Ray:
By letter dated September 22, 1996, the Nuclear Regulatory Commission (NRC) received a petition requesting the NRC to shut down the San Onofre Nuclear Generating Station "as soon as possible" pending a complete review of the "new f
seismic risk." The Petitioner supported the request on the basis of his perception of an increase in the seismic risk indicated by new information gathered at the Landers and Northridge quakes. On November 22, 1996, the Acting Director of the Office of Nuclear Reactor Regulation issued a letter denying the request for immediate action but indicated that the staff will evaluate the matters raised in the petition within a reasonable time pursuant to 10 CFR 2.206. The NRC staff's letter and the original 2.206 petition have been provided to you separately. The Petitioner filed additional information in support of his request by letter dated December 10, 1996 (enclosed).
To aid the staff in providing its response to this petition, please respond-to the enclosed raquest for information by March 14, 1997.
Please include the Peti';ioner on distribution for all correspondence to the NRC pertaining to this petition:
Mr. Stephen Dwyer c/o Robert Sanregret, Esq.
17621 Irvine Blvd. #100 Tustin, CA 92780 Sincerely, ORIGINAL SIGNED BY 6
Mel B. Fields, Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos. 50-361 DISTRIBUTION:
and 50-362
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't j*****,o February 3, 1997 Mr. Harold B. Ray Executive Vice President Southern California Edison Company San Onofre Nuclear Generating Station P. O. Box 128 San Clemente, California 92674-0128
SUBJECT:
REQUEST FOR GE0 LOGICAL AND SEISMIC INFORMATION FOR THE SAN ON0FRE NUCLEAR GENERATING STATION
Dear Mr. Ray:
By letter dated September 22, 1996, the Nuclear Regulatory Commission (NRC) received a petition requesting the NRC to shut down the San Onofre Nuclear Generating Station "as soon as possible" pending a complete review of the "new seismic risk." The Petitioner supported the request on the basis of his perception of an increase in the seismic risk indicated by new information gathered at the Landers and Northridge quakes. On November 22, 1996, the Acting Director of the Office of Nucleae Reactor Regulation issued a letter denying the request for immediate action but indicated that the staff will evaluate the matters raised in the petitlon within a reasonable time pursuant to 10 CFR 2.206. The NRC staff's letter and the original 2.206 petition have been provided to you separately. The Petitioner filed additional information in support of his request by letter dated December 10, 1996 (enclosed).
1 To aid the staff in providing its response to this petition, please respond to the enclosed request for information by March 14, 1997.
Please include the Petitioner on distribution for all correspondence to the NRC pertaining to this petition:
Mr. Stephen Dwyer c/o Robert Sanregret, Esq.
17621 Irvine Blvd. #100 Tustin, CA 92780 Sincerely,
,/
Mel B. Fields, Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos. 50-361 and 50-362
Enclosures:
- 1. Request for Information
- 2. December 10, 1996 Letter from Mr. Dwyer cc w/ encl: See next page
J Mr. Harold B. Ray -
i, cc w/ enc 1:
Mr. R. W. Krieger, Vice President Resident Inspector / San Onofre NPS Southern California Edison Company c/o U.S. Nuclear Regulatory Commission San Onofre Nuclear Generating Station Post Office Scx 4329 P. O. Box 128 San Clemente, California 92674 San Clemente, California 92674-0128 Mayor Chairman, Board of Supervisors City of San Clemente County of San Diego 100 Avenida Presidio 1600 Pacific Highway, Room 335 San Clemente, California 92672 San Diego, California 92101 Mr. Stephen Dwyer Alan R. Watts, Esq.
c/o Robert Sanregret, Esq.
Woodruff, Spradlin & Smart 17621 Irvine Blvd. #100 701 S. Parker St. No. 7000 Tustine, CA 92780 Orange, California 92668-4702 Mr. Sherwin Harris i
Resource Project Manager Public Utilities Department City of Riverside 3900 Main Street Riverside, California 92522 Dr. Harvey Collins, Chief Division of Drinking Water and Environmental Management California Department of Health Services P. O. Box 942732 l
Sacramento, California 94234-7320 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower & Pavilion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Mr. Terry Winter Manager, Power Operations San Diego Gas & Electric Company P.O. Box 1831 San Diego, California 92112-4150 Mr. Steve Hsu Radiologic Health Branch State Department of Health Services Post Office Box 942732 Sacramento, California 94234 Y
a REQUEST FOR INFORMATION GEOLOGIC AND SEISMIC ISSUES SAN ONOFRE NUCLEAR GENERATING STATION DOCKET NOS. 50-361 AND 50-362 1.
Five empirical ground motion attenuation functions were used by the estimation of the probabilistic seismic hazard at San Onofre Nuclear Generating Station (SONGS) for the Individual Plant Examination for External Events (IPEEE) program. Did the development of these functions include data from recent southern California earthquakes such as the Northridge and Landers events? If not, how do the estimates of ground motion using these functions compare with the data recorded from these two events?
2.
Provide the results from any geological or geophysical investigations performed in the SONGS region that contain information about the tectonic regime, the potential for thrust earthquakes, the existence or non-existence of buried or blind thrust faults, or the potential for surface displacement on the order of that which resulted from the Landers earthquake.
3.
Provide any assessment of the ground motion at the SONGS site from a magnitude 7 earthquake on the South Coast Offshore Zone of Deformation at a distance of 8 kilometers. Did any such assessments consider the ground motions recorded from earthquakes that have occurred since the licensing of SONGS, Units 2 and 3, such as those at Coalinga, Petrolia, Loma Prieta, Landers and Northridge?
4.
The SONGS Final Safety Analysis Report states in Section 2.5.1.1.3.4.2 that there are faults east of the South Coast Offshore Zone of Deformation that are the types of faults that result from deformation associated with folding and appear to be intraformational faults generated by the folding of the sediments. What type of faults are the intraformational faults? Are they fold axis faults, bedding plane faults, or some other type? What is the sense of motion on these faults (i.e. normal, reverse)?
5.
Provide any assessment in your possession regarding the potential for blind thrust faults in the SONGS site region.
Provide any assessment regarding the size of earthquakes on the faults, if they exist, and any estimates of the vibratory ground motion at the SONGS site from these events.