ML19254F421
| ML19254F421 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 10/16/1979 |
| From: | Hood D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7911090375 | |
| Download: ML19254F421 (5) | |
Text
.
MEETING
SUMMARY
DISTRIBUTION Docket File NRC PDR Local POR Reading LWR #4 File H. Denton E. Case H. Berkow W. Russell D. Ross D. Vassallo S. Varga J. Stolz R. Baer
- 0. Parr L. Rubenstein C. Heltemes L. Crocker B. Xirschner F. Williams R. Mattson R. DeYoung Project Manager D. Hood Attorney, ELD Licensing Assistant M. Service IE (3)
ACRS (16)
R. Denise NRC
Participants:
P. Sobel T. Cardone D. Gillen S. Davis R. E. Jackson 1301 132 79110903 7
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CCT 13 N Docket Nos. 50-329 and 50-330 APPLICANT: Consumers Power Company FACILITY:
flidland Plant, Units 1 and 2
SUBJECT:
SUMMARY
OF JULY 19, 1979 MEETING ON SITE GE0 LOGY AND SEISMICITY On July 19, 1979 the NRC staff met in Bethesda, Maryland with Consumers Power Company (the applicant), Bechul, and consultants to discuss the geology and seismicity of the site for Midland Plant, Units 1 and 2.
Attendees are listed in Enclosure 1.
The Midland Plant, which is approximately 62? complete, has been designed and constructed to a seismic acceleration value of 0.12g for the Safe Shutdown Earthquake. This value, approved by NRC and USGS during the review for con-struction pernits, is based upon the plant being located in the Michigan Basin Tectonic Province. During its more recent review for cperating licenses for fiidland and other plants in the region, the staff has expressed concern as to whether sufficient evidence exists to justify sept 'ation of the Michigan Basin from the larger Central Stable Region Tectonic Province for which a higher g valuehasbeenassociated.1/
It is the applicant's position that the Michigan Batin possesses sufficiently distinctive geologic and seismic characteristics to.instify its treatment as a separate tectonic or seismo-tectonic province for f.ne purpose of evaluating the Safe Shutdown Earthquake at the Midland site. In support of this po*: ion, the applicant described results of a statistical test using eart quake at :t city rates in several subareas of the Central Stable Region compared to the Michigan Basin. The applicant will sunmarize this test in a future.~SAR amendment responding to staff request number 361.7. The applicant finds that significant differences in seismic hazard characterization within the Central Stable Region exist and that the Midland site area is among the areas within the Central Stable Region characterized by the lower hazard levels.
1/ Notes: Staff Request Numbers 361.S and 361.7 for Midland 1301 933
OCT 161979 The applicant also finds the Michigan Basin to be geologically distinguishable i.cm the remainder of the Central Stable Region. An overview of the Michigan Basin and details of tectonic history was presented by the applicants consultants, Dr. James Fisher of Michigan State University. The presentation cited some contradictions within the Central Stable Region. Dr. Fisher concludes from his review that the Central Stable Region is not a single tectonic province and should be subdivided.
Consumers Power Company is also engaged in the distribution and sale of natural gas, and therefore utilizes geological data from Michigan's oil and gas industry.
Mr. Bill Mantek of Northern Michigan Exploration Company presented an overview of data available from this information source.
Following the applicants presentation, the staff observed that the critical features for the Michigan Basin do net appear to be sufficiently distinct to justify consideration of the Michigan Basin apart from the Central Region.
The absence of a distinct contrast with the Illinois Basin, for example, was cited. The staff suggested that siace the meeting failed to sufficiently establish that the Michigan Basin was a distinct tectonic prcvince, the appli-cant might consider demonstrating that the level of seismicity is lower near the Midland site. The staff also referred the applicant to the site specific spectra studies being perfomed for the Sequoyah OL review-and the ralated Systematic Evaluation Program as alternative approaches ta demonstrate the conservatism of the seismic designs.
The staff acknowledged that further meetings with the applicant regarding this open item appears appropriate. The staff stated that a contract for outside support to further review Midland seismicity is being considered.
Copies of the viewgraph slides used during the presentations are filed by the staff's licensing project manager and are available upon request.
x Oarl Hood, Project Manager Light Water Reactors Branch No. 4 Division of Project Management
Enclosures:
As stated cc: See next page 1301
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Consumers Power Company ccs:
Michael I. Miller, Esq.
Mr. S. H. Howell Isham, Lincoln & Beale Vice President Suite 4200 Consumers Power Company One First National Plaza 212 West Michigan Avenue Chicago, Illinois 60603 Jackson, Michigan 49201 Judd L. Bacon, Esq.
Constraers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Mr. Paul A. Perry Secretary Consumers Pomr Company
'12 W. Michigan Avenue Jackson, Michigan 49201 Myr]n M. Cherry, Esq.
One IBM Pla:a Chicago, Illinois 60611 Mary Sinclair y
5711 St=merset Drive Miuland, Michigan 48640 Frank J. Kelley, Esq.
25 Attorney General 4
State of Michigan Envi-onmental
'"E6 Protection Division
?MM 720 Law Building 7@
'Cpf Lar sing, Michigan 48913 Mr. k'endell Marshall Route 10 j
Midiand, Michigan 48640
.-g Grant J. Merritt, Esq.
bh Thompson, Nielsen, Klaverkang & James
,2f3 4444 IDS Center M
80 South Eighth Street Minneapolis, Minnesota 55402 Mr. Don van Farowe, Chief Division of Radiolcgical Fealth Department of Public Health 12n1 11R P. O. Box 33035 IJUi JJJ Lansing, Micnigan Ja909 s
ENCLOSURE 1 ATTENDEES Consumer Power Comoany Thivu Thiruvengadam William Mantek (N. Michigan Exploration Co.)
D. A. Bixel Jim Zabritski Bechtel William C. Paris, Jr.
Phil Martinez Karl Wiedner T. E. Johnson J. L. Litehiser M. J. Adair J. H. Ross Consultants Dr. James Fisher (Michigan State University)
NRC D. Hood Phyllis Sobel Tom Cardone Dan Gillen Stan Davis R. E. Jackson 1301 236
ENCLOSURE 2 AGENDA NRC MEETING ON MIDLAND SITE GEOL 0r-Y (MICHIGAN BASIN) 1.
Introduction Jim Zabritski/Thiru Thiruvengadem (Consumers Power Company) a.
Previous Licensing History b.
Present Status of Construction 2.
Overview of Michigan Basin and Details James Fisher of Tectonic History (Michigan State University)
?.
SAR Description of Michigan Basin John Ross/ Joe Litehiser (Bechtel) a.
Geology b.
Seismology 4.
Overview by Michigan Oil and Gas Industry Bill Mantek (Ncrthern Michigan Exploration Company) 5.
General Discussion M. S. Adair (Bechtel) 6.
Sumary and Conslusions Jim Zabritski (Consumers Power Company) 1301 037