ML19256B629
| ML19256B629 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 07/02/1979 |
| From: | Gibbs M ISHAM, LINCOLN & BEALE |
| To: | Cowan F, Kornblith L, Smith I Atomic Safety and Licensing Board Panel |
| References | |
| NUDOCS 7908150420 | |
| Download: ML19256B629 (1) | |
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ISHAM. LINCOLN & BEALE
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cnl Ivan W.
Smith, Esq.
Mr. Lester Kornblith, Jr.
Atomic Safety and Licensing Board Atomic Safety and Licensing Board U.S.
Nuclear Regulatory Commission U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Washington, D.C.
20555 Dr. Frederick P. Cowan 6152 N. Verde Trail Apt. B-125 Boca Raton, Florida 33433 Re:
Consumers Power Company (Midland Plant, Units 1 and 2)
Docket Nos. 50-329, 50-330 Gentlemen:
Enclosed are three interim reports submitted by Consumers Power Company to the Nuclear Regulatory Commission pursuant to 10 C.F.R. 550.55(e).
The report concerning the settlement of the diesel generator foundations and building includes an attachment which ref-erences certain figures, drawings and charts; copies of these attach-ments wil. be provided to members of the Atomic Safety and Licensing Board and any party upon request.
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Service List Enclosures 790815e QO S'
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Unit io 1, Docket :io 50-329; Unit No 2, Dcchet No 50-33h Settle 2nt of Diesel Generator Fcundatiens and 2uilding; (a) Serial Ecve-133-73; dated September 29, 1978 (b) Serial McVe-23C-73; dated Nevenber 7, 1973 (c) Serial Hove-267-78; dated December 21, 1972 (d) Serial Hove-1-79; dated Janua.," 5, 1979 (e) Serial Hove-53-79; datec Febrcary 23, 1979 (f) Serial Hove-132-79; dated ispril 30, 1979 G v. e,,n.1 e.-,
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Hove-17k-79 With respect to the temporary air line in the tank far-area which was leaking, several actions have been taken or vill be taken.
The temporary line has been abandoned in place with a new te.mpora:/ line installed in the steu tunnel. The top three to four feet of soil vill be removed prior to recuring backfill, the tank farm arei has been mapped to locate all seepage areas, and an engineerin. evaluation vill be made to determine the condition of the fill material. An inspection pit will be dug in the vicinity of the leak.
"he above was in progress or planned and was discussed during the !EC inspection exit meeting of :tay 17, 1979 Another interis report vill be sent on or before Septembe.r 5,1979 Q
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F.nclosure :
I'CA'3 2h, Settlement of the Diesel Generator Foundations and Building, (In::ufficient Cc=paction in Plant Area Fill Related to Seismic Category I St uctures = ' racilities), Interin Report #6, dated June 11, 1979 C0:
Director, Office of Inspection ?. Inforcement Att:
?L-John G Davis, Acting Director, US 'RC (15)
Direetcr, Office of !'anagement Informatio-a d D-gram Control, US:EC (1)
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SUBJECT:
MCAR 24 (issued 9/7/78)
Settlement of the Diesel Generator Foundations and Building (Insufficient Compaction in Plant Area Fill Related to Seismic Category I Structures and Facilities)
INfERIM REPORT 6, DATE:
June 11,1979 PROJECT:
Consumers Power Company Midland Plant Units 1 & 2 Bechtel Job 7220 Introduction The soil investigation under Seismic Category I structures founded on area fill has been completed. It has been identified that the plant fill under some of these structures has not been adequately compacted.
su::narizes the soil investigation and describes the details This report of remedial actions planned for portions of the auxiliary building, the feedvater isolation valve pits, the part of the service water pu=p structure founded on insufficiently compacted backfill, the Seisnic Category I storag tanks on fill, and the diesel generator building.
The current status of the diesel generator building settlements is also included in this report.
Auxiliarv Building and Feedvater Isolation valve Pics Parts of the auxiliary building are founded on plant area fill. They are the railroad bay on the north side, and electrical penetration areas The rest of for Units 1 and 2 and the control tower on the south side.
the building is founded on glacial till. The areas founded on plant area fill and glacial till are identified in Figures 63 and 64 The feedvater isolation valve pits for both Units 1 and 2 are founded on plant area fill. The feedwater isolation valve pic plans are shown in Figure 63 and a cross section is shown in Figure 70.
Auxiliary Building Electrical Penetration Areas, Control Tower, and A)
Feedvater Isolation Valve Pits 1)
Sequence of backfill place ent Due to the variation of fo the fill in this area was p DUPLICATE DOCUMENT of the auxiliary building p and concrete mudmats were p Entire document previously construction. Due to the c enteredintosystemunder[:
sequence of fill placement 790 7/0060 _
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