ML13333B909
| ML13333B909 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/22/1983 |
| From: | Paulson W Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| LSO5-83-06-048, LSO5-83-6-48, NUDOCS 8306240175 | |
| Download: ML13333B909 (4) | |
Text
June 22, 1983 Docket No. 50-206 LS05-83-06-048 LICENSEE: SOUTHERN CALIFORNIA EDISON COMPANY FACILITY:
San Onofre Nuclear Generating Station, Unit No. 1
SUBJECT:
SUMMARY
OF JUNE 17, 1983 MEETING On June 17, 1983, members of the NRC staff met with representatives of Southern California Edison Company (SCE) in Bethesda, Maryland. The purpose of the meeting was to discuss the NRC staff's request for addi tional information dated April 2, 1983 regarding the vertical reanalysis response spectrum for San Onofre Unit No. 1. A list of attendees is enclosed.
Larry Wight, TERA Corporation, discussed the chronology related to work on the vertical response spectrum for the San Onofre site. The work was done in connection with the San Onofre Unit 2/3 licensing activity.
In 1980, a report was submitted regarding the Imperial Valley 1979 earth quake in response to questions raised by the NRC staff. In November 1980, TERA began work on about ten tasks of which one was directed at a regression analysis of the vertical acceleration for the San Onofre site. The work was completed at the beginning of 1981.
About February 1981, L. Wight presented the results of the overall program, including the regression analysis, to SCE. Based on the regression analysis, TERA predicted a vertical peak ground acceleration of 0.42 - 0.43g.
TERA indicated that the work verified the use of 2/3 of the San Onofre 1 horizontal ground response spectrum for the vertical component of ground motion and they recommended that this work not be continued. No report was prepared covering the regression analysis. The results were not directly addressed in the Unit 2/3 hearings and they were not provided to the NRC. No further work has been done by SCE on the vertical spec trum since the Unit 2/3 hearings. Based on the results of the TERA regression analysis, the NRC staff indicated that this work could have affected the staff's writeup for Units 2/3 but it is not likely that the conclusion would have been affected.
With regard to the Campbell study referenced in the NRC's April 2, 1983 letter, L. Wight indicated that in the early Fall of 1982 the author decided to modify the previous work done in 1980-1981 using the data files that had been subsequently updated and also using a slightly dif-9 0
ferent regression analysis than that used previously. This work was submitted and published in the EOS Transactions, American Geophysical Union in November 1982.
OF 8306240175 830622 OFFCEO PDR ADOCK 05000206 SURNAME PDR DATE...............
FORM 318 (10-80)
N C
AL.R.ECO.RD COPY.................
u NRC FORM 1318 (10-80) NRCM 0240 OFFICIAL R ECOR D COPY USGPO. 1981-335-960
2 -
June 22, 1983 Based on the discussions during this meeting, the NRC staff requested SCE to (1) provide a complete chronology regarding the development of the vertical spectrum information relative to San Onofre Units 1, 2, and 3, (2) document decisions that were made relative to the data, and (3) provide all data regarding the development of the vertical peak ground acceleration and/or spectral values as requested in the staff's April 2, 1983 letter. Further, the staff requested SCE to inform the NRC what course of action would be undertaken regarding the San Onofre Unit No. 1 vertical spectrum.
Original signed by/
Walter A. Paulson, Project Manager Operating Reactors Branch #5 Division of Licensing
Enclosure:
As stated cc w/enclosure:
See next page DISTRIBUTION Docket ACRS (10)
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06/11/83 06
/83 06AJ 83 06/V/83 NRC FORM 318 (10-80) NRCM 0240 OFFICIAL RECORD COPY USGPO: 1981-335-960
ENCLOSURE ATTENDANCE LIST JUNE 17, 1983 MEETING NRC STAFF AND SOUTHERN CALIFORNIA EDISON REPRESENTATIVES Name Affiliation W. Paulson NRC/ORB#5 T. Cheng NRC/SEPB Pei-Ying Chen NRC/SEPB H, G. Hawkins SCE/GeoTech Larry Wight TERA Jack Rainsberry SCE Phil West SCE R. E. Jackson NRC/GSB R. L. Rothman NRC/GSB Leon Reiter NRC/GSB H. Rood NRC/LB#3
cc Charles R. Kocher, Assistant Mr. R. Dietch, Vice President General Counsel Nuclear Engineering and Operations James Beoletto, Esquire Southern California Edison Company Southern California Edison Company 2244 Walnut Grove Avenue Post Office Box 800 Post Office Box 800 Rosemead, California 91770 Rosemead, California 91770 David R. Pigott Orrick, Herrington & Sutcliffe 600 Montgomery Street San Francisco, California 94111 Harry B. Stoehr San Diego Gas & Electric Company P. 0. Box 1831 San Diego, California 92112 Resident Inspector/San Onofre NPS c/o U. S. NRC P. 0. Box 4329 San Clemente, California 92672 Mayor City of San Clemente San Clemente, California 92672 Chairman Board of Supervisors County of San Diego San Diego, California 92101 California Department of Health ATTN: Joseph 0. Ward, Chief Radiation Control Unit Radiological Health Section 714 P Street, Room 498 Sacramento, California 95814 U. S. Environmental Protection Agency Region IX Office ATTN: Regional Radiation Representative 215 Freemont Street San Francisco, California 94111 John B. Martin, Regional Administrator Nuclear Regulatory Commission, Region V 1450 Maria Lane Walnut Creek, California 94596