ML13333B726
| ML13333B726 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/14/1982 |
| From: | Paulson W Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8206240193 | |
| Download: ML13333B726 (4) | |
Text
June 14, 1982 Docket No. 50-206 LICENSEE: Southern California Edison Company FACILITY:
San Onofre Nuclear Generating Station, Unit No. 1
SUBJECT:
SUMMARY
OF MAY 11, 12 AND 13, 1982 MEETINGS On May 11, 12 and 13, 1982, members of the NRC staff met with Southern California Edison personnel and their consultants. The NRC staff walked down the masonry walls at San Onofre Unit No. 1, held audit meetings re garding the masonry walls with the licensee and their consultants (Bechtel Corp., and Computech), and visited the test facilities at the University of California at Berkeley which the licensee proposes to use for a timited masonry wall test program. A list of attendees is enclosed.
By letter dated February 17, 1982, the NRC staff informed the licensee that their proposed non-linear inelastic time history analysis of masonry walls and masonry structures could not be accepted as the sole basis for evaluation and qualification of the masonry walls. Subsequently, to pro vide necessary experimental verification, the licensee committed to do limited dynamic tests. These tests will consist of at least four masonry panels similar to those existing at San Onofre Unit No. 1. The input motions corresponding to 0.67g Housner ground spectra/appropriate floor spectra will be simulated. The design parameters such as the damping values, masonry stress/strain limits and wall displacdments will be verified during the tests. The tests will be conducted in the fall of 1982 and the final test report will be submitted to the NRC staff by March 1983.
The NRC staff, among other things, requested that the licensee provide the history of masonry wall performance during two recent earthquakes in Southern California.
The licensee agreed that if the staff's review of the test results indicates that the masonry walls are not adequate to sustain 0.67g ground motion/.floorSE6C/
spectra motion, then the walls will be modified and the modifications and schedule will be revieweddand approved by the NRC staff.
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Original signed by Walter A. Paulson, Project Manager 8206240193 820614 Operating Reactors Branch #5 PDR ADOCK 05000206 Division of Licensing P
Enclosure:
As stated
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NRC FORM 318 (10-80) NRCM 0240 OFFICIAL RECORD COPY USGPO; 1981-335-960
Docket No. 50-206 LICENSEE: Southern California Edison Company FACILITY:
San Onofre Nuclear Generating Station, Unit No. 1
SUBJECT:
SUMMARY
OF MAY 11, 12 and 13, 1982 MEETINGS On May 11, 12 and 13, 1982, members of the NRC staff met with Southern California Edison personnel and their consultants. The NRC staff walked down the masonry walls at San Onofre Unit No. 1, held audit meetings re garding the masonry walls with the licensee and their consultants Bechtel Corp., and Computech), and visited the test facilities at the University of California at Berkeley which the licensee proposes to use for a limited masonry wall test program. A list of attendees is enclosed.
By letter dated February 17, 1982, the NRC staff informed the licensee that their proposed non-linear inelastic time history analysis of masonry walls and masonry structures could not be accepted as the sole basis for evaluation and qualification of the masonry walls. Subsequently, to pro vide necessary experimental verification, the licensee committed to do limited dynamic tests. These tests will consist of at least four masonry panels similar to those existing at San Onofre Unit No. 1. The input
- motions corresponding to 0.67g Housner ground spectrum will be simulated.
The design parameters such as the damping valves, masonry stress/strain limits and wall displacements will be verified during the tests. The tests will be conducted in the fall of 1982 and the final test report will be submitted to the NRC staff by March 1983.
The NRC staff requested that the licensee provide the history of masonry wall performance during two recent earthquakes in Southern California.
The licensee agreed that if the staff's review of the test results indicates that the masonry walls are not adequate to sustain 0.67g ground motion, then the walls will be modified and the modifications and schedule will be reviewed and approved by the NRC staff.
W. Paulson, Project Manager Operating Reactors Branch #5 Division of Licensing
Enclosure:
As stated OFFICE
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Mr.. R. Dietch cc Charles R. Kocher, Assistant General Counsel James Beoletto, Esquire Southern California Edison Company Post Office Box 800 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:
Chief, Environmental 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 Robert H. Engelken, Regional Administrator Nuclear Regulatory Commission, Region V 1450 Maria Lane Walnut Creek, California 94596 ATTENDANCE LIST MEETING WITH SOUTHERN CALIFORNIA EDISON CO.
REGARDING MASONRY WALLS NRC SOUTHERN CALIFORNIA EDISON F. Schauer J. Rainsberry D. Jeng K. C. Leu N. Chokshi COMPUTECH ENG. SERVICES, INC R. Mayes T. Kelly L. Jones BPC P. Eich D. Day