ML20094K195

Administrative Bldg Foundation Settlements Along Column Line 0.4

ML20094K195
Person / Time
Site:	Midland
Issue date:	12/31/1977
From:	BECHTEL GROUP, INC.
To:
Shared Package
ML19258A087	List: IR 05000329/1978020 IR 05000329/1981012 IR 05000329/1982007 IR 05000329/1982009 IR 05000329/1982014 ML19258A086 ML19351C947 ML20093B251 ML20093B495 ML20093B616 ML20093B708 ML20093B747 ML20093B900 ML20093B940 ML20093C001 ML20093C006 ML20093C017 ML20093C025 ML20093C030 ML20093C035 ML20093C068 ML20093C073 ML20093C079 ML20093C082 ML20093C101 ML20093C104 ML20093C108 ML20093C116 ML20093C174 ML20093C189 ML20093C196 ML20093C226 ML20093C231 ML20093C262 ML20093C318 ML20093C324 ML20093C347 ML20093C354 ML20093C374 ML20093C377 ML20093C390 ML20093C394 ML20093C398 ML20093C405 ML20093C440 ML20093C444 ML20093C649 ML20093M884 ML20093M994 ML20093N005 ... further results
References
CON-BX16-068, CON-BX16-68, FOIA-84-96 NUDOCS 8408140570
Download: ML20094K195 (21)

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i BECHTEL ASSOCIATES PROFESSIONAL CORPORATION

. MIDLAND PLANT UNITS 1 & 2 JOB 7220 k

ADMINISTRATION BUILDING POUNDATION SETTLEMENTS

. ALONG COLUMN LINE 0.4 s

Prepared by:

70 840718 CE0 TECHNICAL SERVICES FD RICEB4-96 December. 1977.

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DTI:0DUCTIO:t Early in September,1977, we were requested by project engineering to assist in reviewing conditions surrounding footing settlements during The founda-construction of the Mid1and Project Administration Buil' ding. -

The affected tion location plan for this building is shown in Figure 1.

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foundations are those along Column Line 0.4.

The following data are presented to enable construction and engineering -

in evaluating the settlement, of these footings.

4 BACKGROIDID TheoriginalgroundattheMidlandsitewaNatapproximatelyElevation608 Af ter ground surface prep-in the vicinity of the administration building.

An aration, plant area fh.11 was placed to approximately Elevation 634.

excavation var later nade to about Elevation 610 to accoesodate construc-tion of the steam tunnel.

Figure 2 shows a cross-section of the tunnel After construction of the tunnel, and the approximate excavation scheme.

the vest side of the tunnel er.cavation was backfilled to approximate Elevation 620 to const.ruct the foundations along Column Line 0.4 of the After foundation construction, the remainder of administration building.

the excavation was backfilled with -sand to grade as shown in Figure 2.

During the early part of September, Geotech was made aware of settlements I

The settlemen't data are given in Table 1.

along the Colurm Line 0.4.

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" FIELD OBSERVATIONS

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....... During..the week.of Septecher.19-23,.1977,.several site reviews were.nade.

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These took place before

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by engineering, construction, and Ccotech personnel.

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and after the ree. oval of the subject footings.

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- Ilpon removal of Coluen M 0.4, it was noted that the soil under and,

f" This was confirmed by pushing a 3/4" steel

.. adjacent to it was so t.

feet'into'the ground,by walking

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.b.ar with little effort approximate y two.

. h racteristics, and by pushing of a

. a the. soil and noting its spongy c a o

3-shovel with litth.e effort.

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PA'O.4 included noisture con-

.T.ests taken at that time in and adjacent to These tests also were taken density, and unconfined compression.

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4 at Coluna g 0.4.

After these field observations, it was decided that two borings should be taken to further evaluate,the conditions along Column Line 0.4.

2 A.t that time, Bechtel Construction's decision was that all affecte

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be removed.

BORINGS 8

two test borings were completed at footings On Septenber 27 and 28, 1977, At footing' M 0.4, standard penetration tests (SPT) 1 LN 0.4 and HT 0.4.

At footing.]rf_0.4, standard penetration and shelby tubes (ST) were taken.

tests were taken.

d Borings included visual inspection and description of soils, Qp tests (compressive, strength of soil by the pochet penetrocater nethod) and an

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visual observa'tions of water conditions (los's'or gain).

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Samples for proctor testing were also taken as shown in log of holes, i

LNA, LNB, and HTA.

The boring logs are shown on Figures 3 through 7.

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TESTING. PROGRAM Shelby tubes taken from Boring LN were subcitted to U. S. Testing Laboratory for unconfined compressive tests.-

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Samples taken at foundations M 0.4 and M 0.4 were also taken by U Results of Testing personnel and unconfined compression tests were made.

testing are given in Table 2.

It was also decided to run Proctor tests on the samples taken directly d d to be under and adjacent to footings in order to determine the stan ar These results are used in calculating the in situ percent compaction.

found.in Figures 8, 9, and 10.

The Proctor curve in Figure 8 was used to calculate the in situ percent ld. This compaction using the in situ dry density datn reported by the Fie i

l information is compared in Figure S with the percent cocpaction prev This comparison shows that the percent compaction was in all reported.

cases lower than that previously determined.

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In order to illustrate the effect of a reduced percent compsetion on

' a of California Bearing Ratio (CDR) tests previously strength of soil, th.-

d in Figure made on three identical sceples of the Midland soils are presente e

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The samples were colspacted at three 1evels of compaction e l:

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resulted in compactive energies of 56,000 f t-lb/ft, 20,000 ft-lb/ft, and It is seen that the pressure values for 12,403 ft-lb/ft, respectively.

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a4.5 psi to a penetration of 0.1" at the navbun dry density reduced from 3

to 12,400 5 psi by reducing the conpactive energy from 56,000 fc-lb/fc 3

ft-lb/fc.

CONCLUSION Based on available data the material under and adjacent to the subject footings, (Elevation 618-622) had insufficient bearing capacity to support the foundations.

The backfilled other than the soil in question (below 618) appears adequate and this conclusion is supported by SPT borings and compression tests.

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s Administration Building Anchor Bolts for Col. Line 0.4 l'

Top Bolt Elev. 634' 1/2" I

Per Dwg. 981, Rev. 1; Sec. D The Columns and Grade Beam For Column Line 0.4 Shows Settlement Per As Built Elevations Taken 8-23-77 g

._Colunu'_s_Elevation Settlenent (ft)_

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0.11 Fa 634.10

. 0.17 634.03 g

M 634.01 0.20 P

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4 MID1MID 11 NITS 1 & 2

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ADHINISTRATION BUILDING EXCAVATION

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I UNCONFINED COMPRT.SSION TESTS i

• • Allowable

• • • • "I Remarks

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LEGAL a

DEPARThtENT

,,,,,, _ R wgdShikil Vwe Persede

.aJ cener.,ntce.e a

.M ConSumETE l.

, Dagetr o nc ree==en i

rUW L s wus E wies, i

< g g's meg =s A88erseys l

)

Robert J Svers

- s our.

Susandy E Hagen sumer Asserseys General Offices: 212 West Michigen Avenue, Jackson. MI 49201 + (51U 788-0550 J E Bnsaner Lesley Desud Qurtes D Deumon James w Desnomey John P Dishey ITAesvA W ::::;'

a.

Riehard L Hasnes yc,c)

/6.h lcwe

• ~ ' ' ' ', ", *

.or.en, September 18, 1981 C# jf,

Z^E Desid A ASheleses gg Pueds H helles Vincens P T _

a Jon R Rohienen Du e R need Gregory A Sende Just O Susmate waner soon see-o A T Udrys Wil11am Paton, Esq.

Doms o vigus=

Counsel for NRC Staff U. S. Nuclear Regulatory Comm.

Washington, D.C.

20555

Dear Mr. Paton:

Attached hereto are copies of the documents requested by Joseph Kane with respect to the investigation following the Administration Building grade beam settlement.

Included are copies of borings "D" and "E".

I look forward to seeing you again in October.

Very truly yours, woe,d James E. Brunner n

w...

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o, UNITED STATES i

NUCLEAR REGULATORY COMMISSION

\\ 1 vC E

W ASHINGTON. D. C. 20$56 MAR 171931 Docket Nos. 50-329/330 ME>iORANDUM FOR: Frank J. Miraglia, Chief Licensing Branch No. 3 Division of Licensing THRU:

( James P. Knight, Assistant Director g

for Components and Structures Engineering Division of Engineering FROM:

George Lear Chief Hydrologic and Geotechnical Engineering Branch Division of Engineering

SUBJECT:

MIDLAND - CHANGES IN REMEDIAL ACTION AS INDICATED IN CONSUMERS FEBRUARY 27, 1981 TELECON Plant Name: Midland Plants, Units 1 and 2 Licensing Stage: Post CP Docket Numbers: 50-329/330 Responsible Branch: LB No. 3; D. Hood, LPM Review Status: Continuing The infomation provided in the March 13, 1981 memorandum to files on the above subject which was prepared by D. Hood is the basis for the following request by the Geotechnical Engineering Section.

(1) To minimize the potential for future differences in the review of the Midland project, we suggest that DOL arrange a telecon between Consumers Power Co. and their consultants with the Corps of Engineers and the GES prior to Consumers beginning the explorations at the Midland site.

The objectives of the call would be:

a.

To make arrangements to have a Corps representative at the site when certain borings and sampling operations are underway.

b.

To discuss CPCo plans for selecting the locations and depths where undisturbed samples will be taken.

In addition to the above request for arranging the telecon, DOL is also requested to have Consumers Power Co. provide one copy of the PSAR to the U.S. Army Corps of Engineers, Detroit District.

7

• Io_3A3&ZR 1P

.3

t,,

n Frank J. Miraglia MAR 171981 Consumers Power Co. is also requested to provide a list of reports completed by Dames and Moore for the Midland project which have not been provided to the NRC. The intent of this request is to detemine what information exists beyond that provided in Appendices 2A and 28 of the FSAR documents.

Original signed by George Lear George lear. Chief Hydrologic and Geotechnical Engineering Branch Division of Engineering cc:

R. Vollmer J. Knight G. Lear L. Heller D. Hood H. Levin W. Paton N. Gehring, C0E J. Vane l

l I

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~u" '*-23"2+

~~

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UNITED STATES J.Kom.

NUCLEAR REGULATORY COMMISSION g'Q.g (D

.f a

r.

wasumoron.o. c. asses Cr ppa ccE. o Mu M 131986 Docket Nos.: 50-329/330 MEMDRANDUM FOR: File 4

FROM:

D. Hood 1

SUBJECT:

FEBRUARY 27, 1981 TELECON REGARDING CHANGES IN REMEDIAL ACTIONS FOR HIDLAND SOIL SETTLEMENT At 11:15 a.m. on February 27, 1981, Messrs. J. Cook, G. Keeley, and others of Consumers Power Company called Messrs. R.' Vollmer, F. Miraglia (Acting for R. Tedesco)s H. Levin, and D. Hood of NRC to report certain decisions and 4

q changes intended to expedite resolution of the soil matter on Midland Plant, Units 1 and 2.

l (1) Mr. Cook has today authorized all borings, exploration and testing requested by the Staff's letter of June 30,1980, Request 37, as subsequently i

~ amended by R. Tedesco letter. The Staff and the Corps of Engineers will be invited to participate as requested in the staff letter.

Samples will be sent to an independent laboratory and results of analyses will be provided to the, Staff.

9 (2) For the Diesel Generator Building, the program will measure tre pre-consolidation pressure of the boring sample and this will be correlated l

by analysis to what the surcharge program should have done. An error

)

analysis of tt.e uncertainty of this empirical data associated with

)

borings will also be provided. Consumers would appreciate an opportunity 1

to discuss these results with the staff prior to conclusion of the staff review.

1 (3) The proposed remedial action for the Service Water Building has been changed. The use of piles has been dropped and a Bin Wall concept (essentially i

an extension of the entire North wall down to till) will be adopted.

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Underpinning was found to provide little seismic margin. A conceptual 4

design package, including seismic discussions, will be presented for the j-new fix the first week in April.

- (4) The fix for the Aux. Bldg. remains the same, however more caissons might' possibly be added if found to be needed. Other possibilities for lateral loads are being reviewed in the event such should be needed. A potential 50.55(e) report on the Aux. Bldg. seismic analysis was issued February 20,1981.

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MAR 13 1981 '

(5) The drilling of wells for the permanent ' ewatering system may prove d

to be a pacing schedule. item if a lengthy hearing results. -Mr. Cook would like to explore with the Staff the possibility that the drilling of these wells might be acceptable to the staff prior to completion of the hearing. ' Mr. Cook noted that wells can. always be plugged if

~

neces.sary at some later date.

(6).Two reports by Weston' Geophysical, one for the seismic response spectra at the original ground surface and another on the probabilistic seismic hazards study will be forwarded March 2,1981. A third report, covering the response spectra at the top of the fill will be forwarded later.

A meeting on the first two reports is requested.

(7) A 50.55(e) report on the BWST cracks was issued February 20, 1981. Five options are being considered at this time.

p

/I P Darl Hood, Project Manager Licensing Branch No. 3 Division of Licensing C

cc.(J. Kane/

L. Heller W. Paton G. Lear J. Knight F. Schauer F. Rinaldi

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S. S. Afifi Date 12 May 1980 L. A. Kendall Report of Pile Driving Operations From Sutiest for' Service Water Test Pile

April 23, 1980

'of Geotechnical Services Ann Arbor 10 D 5 S. L. ' Blue u/o At

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'1320, 3410 INTRODUCTION Driving operations for the test pile to be installed near the northeast corner of the Service Water Building at the Midland jobsite were scheduled to begin early in the morning-of Wednesday, April 23, 1980.

M. T.

Davisson (consultant) and J. O. Wanzeck (Geotech) were on hand to monitor

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the installation. The weather was cool,(50*F) and clear with a light breeze.

OPERATIONS The pre-drilling operation was not begun.until. late morning (10:30 a.m.)

i due to a mechanical problem with the drilling crane. Once started the pre-drilling operation proceeded without incident to a depth of 30 feet.

. The test pile was then dropped into the approximately 16 inch dianeter hole with a free fall of 31 feet. Driving began after lunch and after the cushion had been repaired (the mycarta/ aluminum stack was replaced). Once l

started, driving continued for 5 minutes before pile damage forced an interruption.

(The top of the pile bent during drivin8 and had to be removed). Driving resuoed after a 20 minute delay, and continued for 12 minutes until a sudden change,in pile resistance occured. Canonie's Supt. G. Thorne felt that the pile had been broken.

Consultant M. T.

Davisson wanted to be sure that it was a broken pile, and not a sof t soil layer, that caused the change in resistance.

Driving was therefore briefly resumed. The very low resistance encount'ered as well as the sound of the ha:nmer on the pile convinced all observers that the pile was broken.

f RESULT l

Af ter driving operations were stopped and the pile was cut off, the location of the top of the shear was found to be at elevation 608. Measurements i

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also determined that apprdxiantely 3. feet of pipe is buckled beneath the shear. As the pipe is in a' Q-area, it.will be concreted and left in place.

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.\\ l.$ 4lCJ concurrences, ] ~ (t - , CORD of approvals,i l Do NOT use thisdisapprovals, clearances, and similar act on. s , e Ra M w..........,.,.,,.. - > b pnoa t 2755/ y'"* so41.tos y 4:e-ots .es-to--et< as-t .e. l OPTIONAL. FORM 41 R( (CP R) 100*11.2o0 sa a F l f. J-I ~ 6-- -g l

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• I' i-MIDLAND HEARING Prehearing Conferences

!YI 18 lntltry. & $ ff l~ Z$3 9/10/80 Prehrg. Conf. pp. 234-408 1/28/81 Prehrg. Conf. pp. 409-690 1/29/31 Prehrg. Conf. pp. 691-826 2/24/81 Corrections to Transcript of 1/28/81 a y o 5 i l t I r ,-_,s-,,,. ...v-. . -... _ ~, ~...... _...... _ _

1 p.a 2_.9.% - ,v. +. Depositions'Of Date Pages Exhibits G. Gallagher (NRC-IE) 11/17/80 1-116 1-8 11/18/80 117-345 12/16/80 346-528-K. Naidu (NRC-IE) 2/26/81 1-174 1 ~ G. Fiore111 (NRC-IE) 2/17/81 1-152 1-11 J. Keppler (NRC-IE) 1/6/81 1-164 k-7 1/16/81 165-248 8-13 R. Shewmaker (NRC-IE) 1/19/81 1 165 1-28 H. Thornburg (NRC-IE) 2/20/81 D. Hood (NRC-LPM) 10/7-8/80 1-314 1-21 12/3/80 315-407 a./is/rt Transcript Corrections 12/29/80 cG -32 1-4 Transcript Corrections 2/17/81 1-6 L. Heller (NRC-HGEB) 10/9/80 1-139 1-6 12/4/80 139-247 12/5/80 248-353 i J. Kane (NRC-HGEB) 10/14/80 Vol. I,1-154a 1-17 10/15/80 Vol. II,1-209 10/16/80-Vol. III,1-94 ~ 12/2/80 Vol. IV,1-185 12/3/80 Vol.' V,186-357 12/4/80 "ol. VI,358-406 Transcript Corrections 12/5/80 1-9 J. Simpson (USACE) 11/19/80 1-145 1-17 i )

(-7 -f 2' MIDLAND HEARING. Depositions Of Date Pages Exhibits ' W. Otto (USACE) 1/19/81 1-165 1-7 R. Erickson (USACE) 1/20/81 1-85 1-4 H. Singh (USACE)' 12/18-19/80 Vol. I,1-215 A, 1-6 1/21/8 Vol. II,216-343 1/22/ A b 1-209 b h 100 F. Rinaldi (NRC-SEB) 1/6/81 1-162 1-16 P. Huang (NSWC) 1/9/81 1-54 1-3 J. Matra (NSWC) 1/7/81 1-114 1-4 A. Cappucci (NRC-MEB) 1/22/81 1-114 1-14 J. Brammer (ETEC) 1/22/81 1-61 1-4 W. Chen (ETEC) 1/21/81 1-131 1-10 J. Gilray (NRC-QAB) 2/20/81 1-54 1-3 G. Keeley (CPC) 10/23/81 1-87 1&2 T.'Cooke (CPC) 10/22/80-1-64 1-3 D. Horn (CPC) 10/21-22/80 1-174 1-3 175-245 T. Thiruvengadam (CPC) 12/11/80 1-61 1&2 1 (formerly Bechtel) W. Ferris (Bechtel) 12/10-11/80 1-252 O e --rmw- -,me

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p.2 _.-_. ... sf ,f, il ^ -3~ ~ MIDLAND HEARINGS - Depositions Of . Date Pages Exhibits S. Afifi (Bechtel) 10/29/80 1-123 1-6 10/30/80-124-223 . & Includes 10/31/80 224-261 Informal Discovery Documents B. Dhar (Bechtel) 12/17/80 1-160 Informal Discovery Documents R. Peck (Bechtel Consult) 1/13/81 1-140 1-5 1/14/81 141-205 A. Hendron (Bechtel Consult) 1/27/81 1-165 1-33 1/28/81 166-230 M. Davisson (Bechtel Consult) 1/14/81 1-147 1-8 C. Gould (Bechtel Consult) 1/8/81 1-120 1&2 S 4 0 e t = * * =}}