ML20147F913

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Summary of 781116 Meeting W/Util to Discuss SEP Review of Site Geology & Geotechnical Data.List of Attendees Encl
ML20147F913
Person / Time
Site: Big Rock Point File:Consumers Energy icon.png
Issue date: 12/15/1978
From: Cheng T
Office of Nuclear Reactor Regulation
To: Desiree Davis
Office of Nuclear Reactor Regulation
References
FOIA-79-86, TASK-02-04, TASK-2-4, TASK-RR NUDOCS 7812260045
Download: ML20147F913 (4)


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  • ,, p 8 MEETING

SUMMARY

DISTRIBUTION Central Files Docket M PDR

- Local POR

.SEPB Reading.

NRR Reading H. Denton E. Case V. Stello D. Eisenhut B. Grimes T. Ippolito ~

R. Reid^

G. Knighton V. Noonan A. Schwencer D. Ziemann D. K. Davis G. Lainas P. Check J. Scinto, OELD OI&E (3)-

R. Fraley, ACRS (16)

H. Smith SEPB Members (13)

Licensee Consumers Power Company W. J. Bekius R. Huston J. Kuemin.

D. Demoor

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A f CEC 151978 ,

MEMORANDUM FOR: D. K. Davis, Chief, Systematic-Evaluation Program Branch, 00R FROM: T. M. Cheng, Systematic Evaluation Program Branch, D0R ,

SUBJECT:

SUMMARY

OF MEETING WITH CONSUMERS POWER COMPANY - >

GEOLOGY AND GE0 TECHNICAL SITE VISIT l

On November 16, 1978 members of NRC staff met with representatives of Consumers Power Company (attendees listed in Enclosure 1) to discuss technical questions related to the Systematic Evaluation Program (SEP) review of site geology and geotechnical data of the plant, to tour the Big Rock Point site and to identify and obtain l

information which is not available in the Big Rock Point docket.

The meeting opened with a discussion by T. M. Cheng of the Systematic Evaluation Program Branch addressing the purpose of the visit and the ,

scope of review. The discussions focused on:

1. Settlement of foundations and buried equipment
a. Construction records
b. Foundation drawings
2. Geology and Topography

[ a. Boring logs and drill cores

b. Faulting investigations
c. Mappings
d. Lineament studies The staff explained that the local geological and geotechnical information including the engineering properties of the foundation soil will serve both as input into the Lawrence Livermore Laboratory (LLL) Site Specific Spectra development and as a basis for the staff's overall review of geo-logic and seismic hazards at the Big Rock Point site. The results of dis-cussion and the staff's coments are summarized below.
1. Only limited foundation drawings (Dwg. Nos. 0740G2-0006, -0152,

-0251,-0252,-0254) are available for review and the settlement

l OEC 15 N D. K.. Davis of foundations' had not been monitored through monument obser-vations. The licensee agreed to provide as much information as they can before January 1979. .i

2. A total of seven borings had been taken during construction of the plant. The boring locations and information of boring  !

' columns are documented in the report from Soil Testing Services,  !

Inc. to Consumers Power Co. on March 7, 1960 t

3. Additional borings are being drilled next to the plant structures for generating the engineering properties of the supporting soil. j This information will be submitted to the staff by January 1979. t 4 The licensee indicated that some ancient faults were located across Lake Michigan and they'will not affect the local .

seismicity at the site. The information of faulting. is documented in the PSAR of Haven site, Wisconsin Electric  ;

Power Co.

5. The licensee pointed out that as documented in the Hazard '

Analysis Report, only a few shocks have occurred within a -

200 miles radius of the site and a very low seismicity is t

suggested to be assigned to the site.

For both items 4. and 5., the staff indicated that more investigation i is necessary before a conclusion will be drawn.

The site tour included observations of local geology, topography and  ;

settlement of foundations. Some foundation cracks were found at joints between plant structures. However, these cracks are not con-  :

l sidered to be significant.

A field tour was taken in areas surrounding the site which concentrated on observations of outcrops at local quarries and Petoski Park. Large ,

sink holes appeared to exist, as result of carbonate solutioning, at  !

both limestone quarries visited. Small solution cavities were observed ,

at Petoski Park, i l

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A wrap-up briefing was held after.the completion of the field tour, i The staff ' confirmed with licensee the additional information to be l provided in the near fature.

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J DEC i : !?iB D. K. Davis 1. Settlement of foundations (January 1979)

2. Soil / rock stratification and the engineering properties of supporting soil (January 1979)

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Thomas M. Cheng Systematic Evaluation Program Branch, 00R

Enclosure:

As stated I

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ENCLOSURE 1 L i: 1U3 ,

LIST OF ATTENDEES SITE VISIT - BIG ROCK POINT NOVEMBER 16, 1978 NRC Stan Nowicki ORB #2/00R .

A. T. Cardone GSB/DSE T. M. Cheng SEPB/00R CONSUMERS POWER W. J. Bekius NAD Roger Huston NAD Jim Kuemin NAD i Don Demoor Big Rock Point

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