ML20090A110
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Docket Nos:
50-329 50-330 APPLICANT:
Consumer Power Company j
FACILITY:
Midland Plant. Units 1 & 2
SUBJECT:
StHtutY OF Mfut0i 6.1979 TRIP TO OBSERVE STATUS OF SOIL PRD,0AD PROGRAM On March 6,1979. members of the NRC visited the Midland site to observe the status of the pmloading program being performed in order to conso-lidate the fill in the vicinity of and underneath the diesel generator building.
participants and contacts are listed in Enclosure 1.
The preload program consists of placing granular fill (sand) inside the diesel genentor building and for some distance outside the butiding.
i The level of preload at this stage consisted of a 10-foot unifom height.
Further pmload operation is dependent upon the applicant's evaluation of the results of this stage.
Plant grade is the maximum espected.A preload height of 20 feet above final The preliminary data being obtained on the response to the 10-foot proloed mes reviewed. The data suggests that additional compaction is being achieved particularly at the upper levels of the fill.
As expected, a rapid rate of settlement was experienced initially in response to the preload, and the rate of settlement generally decreased thereafter. The preliminary data also suggests that the south-east corner of the diesel generator building is settling at a greater rate than the south-west corner. The applicant-al'so noted that the concrete encasament for the condensate line located underneath the western ha'f of the building is nom believed to be in direct contact with the building foundation. This situation is being closely monitored and the validity of the measurements is being checked.
i The preliminary measurements of ground water behavior beneath the building in resnonse to the preload shcued local variations in level.
This tends to f is variable.
eaafim that the fill material under the structure 7 904170 0T[g The apolicant recorted that instr'rentation previously installed in the tank farm area was being relocated so as not '.o interfere with con-Strisction activities.
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MAR 2 01979 Mpesurements of an underground service water pipe located between the diesel generator building and turbine building indicate a substantial veristion in elevation. The 8echtel repnsentativs stated that this veristion is believed to be due to faulty initial installation, and that the pipe would be replaced upon completion of the preload program.
A general teve of the site was made including all seismic Category I structures founded upon fill.
The date mvisued during the trip will be reported in Bechtel's interin report 5 to MCAR 24 and will be forwarded by the appifcant to the NRC in April 1979.
Darl Hood Light Water Reactor Branch No. 4 Division of Project Management Encloswe:
As stated cc: See next page J
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.summ y Consumers Power Company
- MAR 2 01979 ccs:
Michael 1. Miller, Esq.
Mr. S. H. Howell
! sham, Lincoln & Beale Vice President Suito 4200 Consumers Power Company one First National Plaza 212 West Michigan Avenue Chicago, Illinois 60670 Jackson, Michigan 49201 Judd L. 5. con Esq.
Consumers Power Company 212 West Michtgan Avenue Jackson, Michigan 49201 Mr. Paul A. Perry Secretary Consumers Power Company 212 W. Michigan Avenue Jackson, Michigan 49201 Myron M. Cherry, Esq.
One IBM Plaza Chicago, Illinois 60611 Mary Staciatr 5711 Summerset Ortwe Midland, Michigan 48640 Frank J. Kelley, Esq.
Attorney General State of Michigan Environmental Protection Division 720 Law 8utiding Lansing, Michigan 48913 Mr. Wendell Marshall Route 10 Midland, Michigan 48640 Grant J. Merritt, Esq.
Thompson, Nielsen, Klaverkamp & James 4444 105 Center 80 South Eighth Street Minneapolis, Minnesota 55402 O
O NRC PARTICIPANTS Darl Hood Division of Project Management NRR Dan Gillen Geotechnical Engineering Branch, DSE/NRR Abdel Hafiz Structual Engineering Branch, DSS /NRR Gene Gallagher I&E, Regiori III CONTACTS Consumers Power Company Thiru Thiruvengandam Charles Hunt Bob Wheeler
' Bechtel Charles McConnel Austin Marshall l
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Meeting Summary Distribution up a o 13,*,
Docket File J. Knight NRC POR S. Hanauer 1 POR R. Tedesco R. Bosnak j
ARR Reading S. Pawlicki j
inR M F. Schauer E. G. Case K. Kniel D. Sunch T. Novak R. S. Boyd W. Butler D. Ross V. Benaroya D. 8. Vassallo R. Saterfield D. Skovholt V. Moore M. Ernst W.Gamalli J. Stolz F. Rosa R. Beer R. Denise
- 0. Parr EP Branch Chief S. Verge W. Kreger C. Neltoes G. Lear W. Haass L. Hulman R. Houston D. G111en, DSE L. Crocker A. Hafiz, DSS D. Crutchfield G. Gallagher, IE F. Williams R. J. Mattson R. DeYoung D. Hood Attorney ELD M. Service IE (3)
ACR5 (16)
R. Denise L. Rubenstein I
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