ML20038A530
| ML20038A530 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 10/26/1981 |
| From: | Williams J Office of Nuclear Reactor Regulation |
| To: | John Miller Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8111120940 | |
| Download: ML20038A530 (5) | |
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OCT 2 61981 v
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t NOV05198% 3 MEMOPMDUM FOR: James R. Miller, Chief
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emuuman FRON:
J. H. Williams, Project Manager s
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SUBJECT:
StmARY OF SEISMIC DESIGN MEETING WITH APPLICANT ON OCTOBER 15, 1981 l
i A meeting was held with Illinois Power Company, their A/E Sargent & Lundy, and consultants Weston Geophysical and Harding-Lawson Associates to discuss soil structure interaction analyses.and vibratory ground motion for structural design evaluations. The attendees are listed in Attachment A.
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The Structural Engineering Branch (Jeng, Chokshi) described possible approaches to evaluate soil-structure interaction problems that were acceptable to them.
They indicated that as a minimum the applicant could evaluate a few key
.s structures using Reg. Guide 1.60 spectra and a simple analysis to see where C
i they stood with respect to design margins. SE8 indicated the next step as they saw it was to use' a more complex method of analysis before going to site specific spectra. They felt that site specific spectra required more time and could impact the schedulas. SEB indicated that if site specific spectra should be developed it should be developed at the foundation level in the free.ff eld.
4 Sargent and Lundy (Heider, Singh, Witt) expeessed the desire not to get inte design analysis but rather to empare response spectra. They felt that even if they go to wore complex calculations they would-still need a site specific spectra.
Geosciences Branch (Jackson, Reit5r, Giese-Koch) described the possible options with site specific spectra.
If'the applicant uses a 5.8+.5 earthquake then a higher risk is implied for the Clintor site. However, if a 5.3 earthquake is used then a risk analysis is needed. Midlard was noted as an example where a relatively lower risk was demonstrated, however the Midland study took about one year to complete. It was noted that the schedule for the SER and SSER may not, allow this approach.
It was suggested that the applicant use 5.8 and 5.3 in< parallel efforts to ease _ the schedule problem._ Because of building layouts, h
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the site specific spectra would have to be defined for two site conditions. In
'dddition,. the study should Consider low frequencies and the regional geology f[f f
as well as seismelogical considerations.
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l S&L 1.ndicated they planned to use 5.3 +.5 and demonstrate that the seismic hazard at the Clinton site is the same as elsewhere in the central stable region. They also expressed the desire to use state-of-the-art techniques to account for soil above the foundation level. They summarized the options as they saw them as:
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Use site specific spectra with 5.3 +.5 earthquake and define at
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foundation level.
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Use site specific spectra defined at the surface and employing state-of-the-art techniques tc calculate spectra at tte foundation level.
S&L will follow option 1 and have a work plan avaisable to discuss with the staff by November 19, 1981. The goal would be to have a completed study by early January 1982. They would also have the SSI on key structures com-pleted in early January.
(SEB noted that they required 2 weeks after receipt cf material for SER input). The conflicts and possible impacts on the SER and SSER were noted. Gofer (IPC) indicated that he would discuss the pro-blem with his management.
As a separate subject - a list (see Attachment B) of additional unbuilt block walls was provided to SEB at th2 meeting.
IPC will have to confirm through documentation that these walls will be either reinforced masonry or reinforced concrete walls meeting the staff's criteria, angical05 MOI
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J. H. Willians, Project Manager Standardization & Special Projects Brarch Division of Licensing Attachments:
As stated DISTRIBUTION:
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- gi MEETING NOTICE
SUMMARY
Docket File I&E r.cp on I NRC PDR I&E Recion II
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Local PDR I&E Region III SSPB Rdg.
I&E Region IV TERA I&E Region V NSIC NRC Participants TIC Project Manager E. Case
- HFaulkner D. Eisenhut/R. Purple Service List:
Clinton N. Hughes T. Novak
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S. Varga T. Ippolito R. A. Clark J. Stolz R. Tedesco B. Youngblood A. Schwencer F. Miraglia E. Adensam G. Lainas D. Crutchfield B. Russell J. Olshinski
'R. Vollmer R. Mattson S. Hanauer T. Muriey J. Knight W. Johnston D. Muller P. Check W. Kreger L. Rubenstein F. Schroeder M. Ernst ACRS (16)
I&E (3)
OSD (7)
DELD J. LeDoux p
V. Moore B. Grimes
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6 ATTENDANCE LIST Ocjober 13, 1981 NAME ORGANIZATION J. H. Williams NRC/NRR/DL/SSPB R. A. Witt Sargent & Lundy
.,G. Giese-Koch NRC/NRR/Geosciences
- R. C. Heider Sargent & Lundy J. D. Geier Illinois Power.Co.
A. K. Singh Sargent & Lundy E. N. Levine Weston Geophysic.al G. E. Heim Haring-L'awson Assoc.
L. Reiter NRC/GSB R. E. Lipinski NRC/SEB L. Yang NRC/SEB D. Jeng NRC/SF.B N. C. Chokshi.
NRC/SEB 4
S. K. Shaukat NRC/SEB B. N. Jagannath NRC/HGEB I. Al terman GB B. Jackson C/GB i
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Illinoi-Pom:r Chpany cc w/ enclosure (s):
Mr. L. J. Koch, Vice President Mr. Hugh K. Clark, Esq. Chair [ nan Illinois Power Company P. O. Box 127A 500 South 27th Street Kennedyville, Maryland 2164S' Decatur. Illinci:
52525 Dr. Oscar H. Pari Mr. Julius Geier Atomic Safety and Licensing Board Illinois Power Company U. S. Nuclear Regulatory Commission 500 South 27th Street Washington, D. C.
20555 Decatur, Illinois 62525 Atomic Safety and Licensing Board Mr< Peter V. Fazio, Jr.
Appeal Board Panel Schiff, Hardin & Waite U. S. Nuclear Regulatory Commission 7200 Sears Tower Washington, D. C.
20555 233 South Wacker Drive Chicago, Illinois 60605 Dr. George A. Ferguson School of Engineering Mr. H. H. Livermore, Resident Inspector Howard University U. S. Nuclear Regulatory Commission 2300 Sixth Street, N.W.
RR 3, Box 229A Washington, D. C.
20059 Clinton, Illinois 61727 Mr. Richard J. Goddard, Esq.
Mr. D. L. Foreman, Project Manager Office of the Executive Legal Director General Electric Company U. S. Nuclear Regulatory Commission 175 Curtner Avenue, M/C 682 Washington, D. C.
20555 San Jose, California 95125 Mr. R. C. Heider, Project Manager Ms. Terry Lang Sargent & Lundy Engineers Prairie Alliance 55 East Monroe Street P. O. Box 2424 Chicago, Illinois 60603 Station A Champaign, Illinois 61820 Reed Neuman, Esq.
Assistant Attorney General Philip L. Willman, Esq.
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500 South 2nd Street Assistant Attorney General Springfielo, Illinois 62701 Environme' tal Control Division n
188 West Randolph Street Suite 2315 Chicago, Illinois 60610
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