ML20090L948

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Rev 2 to Procedure FIC-1.100, Q-Listed Soils Placement Job Responsibilities Matrix. Related Info Encl
ML20090L948
Person / Time
Site: Midland
Issue date: 02/25/1980
From:
BECHTEL GROUP, INC.
To:
Shared Package
ML17198A223 List: ... further results
References
CON-BOX-04, CON-BOX-4, FOIA-84-96 FIC-1.100, NUDOCS 8405260124
Download: ML20090L948 (46)
v • d • e


Text

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QUAUTY RELATED FIC-1.100 Re/25/80 2

vision 2 l

CONTROLLED BECHTEL PO!ER CORPORATION Field Instruction FIC - 1.100 Q Q-Listed Soils Placement Job Responsibilities Matrix This supersedes FIC 1.100 Revision 1, Dated 12/4/79.

TO: All Civil Field Engineers & Civil Craft Superintendents.

1.0 PURPOSE

.g This field instruction is written to provide a definition of job responsiblities for Q-Listed soils placement pursuant to Field Procedure FPG-3.000.

O 2.0 SCOPE This field instruction applies to all Q-listed placement on the Midland Nuclear Project..

3.0 REFERENCES

Field Procedure FPG-3.000; Job Responsibilities of Field Engineers, Superintender.ts, and Field Subcontract Engineers.

Specification 7220-C-211; Technical Specification for Backfill.

4.0 RESPONSIBILITIES g

The duties and responsibilities of the following individuals are defined in this instruction:

Sil19861 B405260124 840517 PDR-FOIA RICE 84-96 PDR

FIC - 1.100 Q

Rev. 2 Page 2 a.

On-Site Geo-Tech Soil Engineer Q

b.

Field Soils Quality Control Engineer

.c. Lab Quality Control Engineer d.

Geo-Tech Soils Engineer e.

United States Testing Co. Lab Technician

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I 5.0 INSTRUCTION This instruction provides detailed job responsibilities instruc-tions for Q-listed soils placement.

It is provided as an ampli-fication to FPG-3.000 and is complimentary to the directions provided in Specification 7220-C-211 and Quality Control Inspection Record C-1.02.

Any questions on this instruction should be refered to the Lead Civil Field Engineer.

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Attachments: The attached memos from Project Engiineering list the qualified comoaction equipmest and methods per sections 8.5 and 8.6 of Specification C-211. The attached memo's BEBC-3633 and BCBE-2772 describe the duties of the On-Site Geo-Tech Sofis Engineer with regard to surveillance of soils-related testing operations. This surveillance will be documented A

on a ' Field Engineers report by sampf e/ test number Zsa monitored. The specific procedures and steps in the procedure (s) observed will be stated and the results of the surveillance recorded on the Field Engineers report.

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SUBJECTS W~'.!.

CPCO/MIII.AND PLANT - JOB 7220

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SIOLS WORK COMPACTION FILE: 0274, C-21 1, C-210, C-0465 O'-

RETERENCES QUALITY ASSURANCE STOP VORK REPORT 6

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DII IS : A COMPLETE RESPONSE TO THE REFERENCED. Q/A STOPVORK REPORT 6

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T!E RAMMER-TYPE COMPACTOR CPOGO STI C<'O RVAB HAS BEEN SATISFACTORILY

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CUALITIED TOR USE IN COMPACTING SILS REQUIRING THE FOLLOUING:

.s D SO: AND '553 ' DENSITY TOR STRUCTURAL BACKTILL SAND' AND RANDOM

' SANDS WITH 4. INCH LAYERS AND 8 PASSES..

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23 90 AND 95: DENSITY DETERMINED IN 'ACCORDANCE VITH ' STM D1557 A

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METHOD D TOR CLAYEY SILS WITH 4 INCH LAYERS AND S PASSES.

7HE TEST FILLS FOR QUALIFYING THE RAMMER-TYPE COMPACTOR VERE MONITORED Bf THE ONSITE GECTECHNI CAL ENGINm.

M VELASTEGUI, FOR L M CURTIS AIN ARBOR / 7220-001/JS BECHTEL MIDL.

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EISC-3162 SU3 JECT: CPCO/ MIDLAND PLANT JOB 7220

-QUALITICATION OF COMPACTION EQUIPMENT FILE: 0274, C-211-PR STitIS TVX LISTS VMICH EQUIPMENT IS QUALITIT.,D TOR Q-LISTED AND ON-Q-LISTED TILL PLACDfENT, AS REQUIRED.

L.s-.-a EQUIPMENT TYPE APPLICABLE MATERIAL REQUIRED PASSEI & THICK ' -

NESS

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"J" FOOT VACKER STRUCTURAL AND RAND 03 4" LIFT, 6 PASSES C10 DEL GVR 220.V)

RANDON SAND M-E-V VIER OTARY STRUCTURAL AND 4" LITT, 6 PASSES

  • CMODEL GD 7000)

RANDOM. SAND VIERO PLUS SELT-PROPELLED. STRUCTURAL AND 6" LITT, 10 PASSES ~

CMODEL CA-25D)

RANDOM SAND.

THE A30VE EQUIPMENT VAS QUALIFIED ON TEST STRIPS AND BY ACTUAL USE IN NON-Q-LISTED AREAS.

PL CASTLE 3ERRY ANN ARBOR /7PE2115/7220-001/ER SECHTE, L MIDL g,

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C Bcchtel Assog.dtes Professional Corporati Conwn-m Cm inter-ofdce MemoranEum gg4 8.g 18mpummuner

~7D To pyg,j/CD cate L.E. Davis November 16, 1979 subject From Midland Plant Units 1 & 2 L.E. Curtis Job 7220 Of Eart} work - Qualification T.ngineerint

$ @S 15 3M [2 [

M @ T r2 Copies to of Compaction Equipment At U um File: C274, C-2,11-PR Anne Arbor s

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s. alue NOV 2 01979 7

.F. Corcoran C Curtis BECHTEL POWER CORP.

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JOB 7220

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References. IOM from S.S.. Afiff to L.E. Cartis, 9/'/70 The following equipment have been qualified for use based en tent fills

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and field tests conitored by geotechnical serviens (reference).

.A.

Structural and Randeri San <ts-

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1.

l Wacher vibrator / plate with 8-inch outriture (modell!:W 3001)

(a) all arca requiring !!0% C g

(b) 4-inch lifts and eight passes

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gals,s 1.

Vibro plus (modal C.1-23 PD)

(a) All areas requiring 90 compactiers (b) Five to six-inch lifts and eight pas =es per lif t 2.

Vacher J-foot camper (model G7R 2204)

(a) All areas requiring 90 compaction (b) Four-inch lifts and six passes per lift 3.

Vibro plus dynapact (modelCT-43)

(a) All areas requiring 90: compaction (b) Eight-inch lifts and six passes per lift 4.

Vacker vibratory plate with'8-inch outriggers (er. al DVU 3001)

(a) All areas requiring 90% compactio:e (b) Four-inch lifts and six passes per life.

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A 4 AtchJg es FIC 1.100 BechtelPowerCorporation TELECOPY Interoffice Memorandum t.

L. H. Curtis r= =

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February 13, 1980 Onsite GeoTech Soils Engineer Surveillance of Testing L. E. Davis Operations BCBE-2772 ce Construction c.

Midland, MI s*

P. J. Corcoran J. P. Betts

Reference:

BEBC-3633, dated January 30, 1980 The referenced memorandum was received by Field Engineering, on February 5, 1980.

This memo includes the following directions:

"The onsite GeoTechnical soils engineer shall 9

observe the testing operations at least once a day while testing is in progress.

The test-ing operations to be observed shall include field density and moisture tests, laboratory proctor tests, gradation tests, plotting of zero airvold curves, etc.

Tests to be observed will be' selected by the onsite GeoTechnical soils engineer.

The selection will be random, based on tests being conducted on a particular day and varied to his satisfaction such that all phases of testing are being conducted I.

correctly..."

Based upon discussion among field personnel and telephone conversations with Project Engineering, the field interprets this to mean that not all backfill related tests conducted i

each day must be observed but that at least one of the test procedures on any day of testing must be observed.

We also interpret this direction to mean that all test pro-cedures related to backfill operations must be observed

+

often enough so that the onsite GeoTechnical soils engineer can be satisfied as to the correctness and efficiency of testing operations and.can document such observation.

l 5H167868

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L. H. Curtic BCBE-2772 February 13, 1980 Page Two As directed by thd reference, the field will incorporate the reference in Field Instruction FIC-1.100 (Q) by February 22, 1980, including the above interpretation, unless direction to the contrary is received from Project Engineering.

sA-L E. Davis LED /GK/jrh t

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Inter. office Memorandum 3633 To-L.E. Davis o,,,

January 30, 1980 Subject Midland Plant Units 1 & 2 L.E. Curtis p,

Job 7220 Response to 10 CFR 50.54 m

Engineering Questions coWes to File: 0274, C-211PR, C-0465 h n Arbor At W. Barclay

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L. Curtis L. Dreisbach

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s R. Rixford JAN 311580 J. Wanzack EECHTEL POWER CORP.

Reference:

Response to NRC Question 23, Part (3),

JOS 7220 Section 5, Action Item 22 F.:t The referenced action item requires that project engineering and geotechnical services develop guidelines for surveillance of testing operations by the onsite geotechnical soils engineer.

It is requested that field engineering incorporate the following guidelines into the appropriate field instruction ar2d for:.ard a copy of the revised field instruction to project engineering by February 22, 1980.

Guidelines for Surveillance of Testing Operations:

The onsite geotechnical soils engineer shall observe the testing-l operations at least once a day while testing is in progress. The testing operations to be observed shall include field density and j

moisture tests, laboratory proctor tests, gradation tests, plotting of sero airvoid curves, etc. Tests to be-observed will be selected by the I

onsite geotechnical soils engineer. The atlec, tion will be random, based on tests being conducted on a particular day and varied to his j

satisfaction such that all phases of testing are being conducted t

correctly and are providing the necessary control of the earthwork l

operations. The onsite geotecheical soils engineer shall infora appropriate authorities if the operations are carried out incorrectly and/or if there are any other methods or tests that could be utilized to I

improve the control or provide increased assurance that testing operations are carried on correctly and effectively.

' O SB'.G7870

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g Bechtel Associates Professional Corporation ION to L.E. Davis 3EBC-3633 v

' Page 2 The onsite gaatschnical soils engineer's daily report should show what testing operations vara obaarved and any recommendations for improvements which may have been made.

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.J Bechtel Assc<.Jtes ProfessionalCorporatic Comcm con inter-ortice Memorandum 9'

To Cate L.E. Davis Novrember 16, 1979 Subject From Midland Plane Unite 1 & 2 L.R. Curtis Job 7220 Of Earthwoth - qualification Ingtncerity T

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Copies to of compaction 2 qui;=ent At 2

File: 0274, C-211-PI.

Ann Artot' C

s. alue NOV 2 01979

. P. Corcoran L. Curtis BECHTEL POWER CORP. '

"J. Waareck JOS 7220 C.:n tog PGt References. IC!t froc S.S. Miff to L.L.Curtis, 9/4/79 The followtas equipment have been qualified for use based en cent fills and field tests conttored by geotechnical services (reference).

A.

Structural and .soden San,Is 1.

t!acher vibratory plate with 6-inch outzte :svr- (nt'41.'".*U.1001)

(a) all area requiring PO* RD I

g (b) 4-inch. lifts anel eight passee B.

Clavs 1.

Vihro plus (model C.1-25 PU)

(a) All areas requiring 00% compaceirm (b) Five to eix-inch lifts and eight passes per lif t 2.

Wocher.i-ferat tamper (code?. C7R 2204)

(a) All areas requiring 90 compaction (b) Four-in(h lifes and six passes per lift 3.

Vibro plus dynapact (modelCF-43)

(a) All areas taquirir-90 coeptiction -

(b) Eight-inch lifts 6 d six passes per lif t 4

Wacker vibratory plate with 8-inch outriggers (r..,;al DvU 3001)

(a) All areas requiifng 90% conpaction (b) Four-inch liits and six passe 9 per life.

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0(.~g'Q U*N* I *I 174 DIS.TRIllUTION OF THIS PR0llLEM ALERT OUTSIDC OF EECNTE!. nrnUIRES WRITTEN APPE0 VAL FROM DIVISION ENGINEERING MANAGEMENT.

INFORMATION FROM IT MAY % T,gv g BE USED IN DEVELOPING APPROPRIATE NOTIFICATION OR HECOMMENDATIONS TO M "-*~~

CLIENTS, BUT PRIVILEGED OR OTilERUI'iE SENSITIVE INFOIL'MTION SilALL NOT BE EXTRACTED WITHOUT ABOVE APPROVAL.

d Discipline: Civil Engineering Origin: Ann Arbor

Subject:

Large Settlements Due to Incorrectiv Placed Backfill Discipline Problem Alert Number:

h I.

APPLICABILITY

[

These conditions are applicable to all projects where structures are supported fully or partially by compacted backfill material.

3 II.

PROBLEM DESCRIPTION N'S CC"D'*

Insufficiently compacted plant area backfill under the diesel generator building was discovered because of excessive settlemeg 'h*O

" % 1P# GY during construction. Further investigation by a soils boring program has indicated that both granular and cohesive soils were retr w ouT improperly compacted in other areas of plant fill as well as the po g,yggs I

diesel generator building. This required extensive reanalysis and/or modifications of the diesel generator building, the service

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water structure, the feedwater isolation valve pits, and portions of the auxiliary building.

T6 ourmeg.,r

'D Based on a thorough investigation, the most probable causes for the resulting remedial work include the following.

j A.

All types of compaction equipment used for plant area backfill were not prequalified for lift thickness and number of passes.

This was particularly true for the small hand-operated equipment.

Except for the heavy earth-moving equipment used to construct the plant area dikes, reliance was placed on acceptance being established by end result ASTM acceptance tests.

his.J of Test 1tevtri G't' GeraWr=4 An g' has shown that the testing laboratory failed tc

~2.

B.

obtain meaningful and accurate results af ter performing -the applicable ASTM acceptance tests.

Some examples are the i

following.

1.

More than one-half of the test results for relative density and percent compaction were outside the theoretical t

compari::on limit.

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Incorrcet soil indentification and calculation errors 0

4 were present. haamusa To ac;wh tysrrem. A c e W it a ws.ns eurf Faemoen af -twe w.m

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Ratests used to clear failing tests were not representativA, - -

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of'the material ~that failed.

oc -reur m m y pop Aspet. t s, oc-

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The uality assurance (QA) an quality control (QC) departmenJg y

'PRM 3rovide urveillanceg rogram in lieu of ::::ili_:.~.. g n q,, y an inprocess in-depth inspection program.

In addition, a ymieg g.

continuous, thorough review of the testing methods being performed was not carried out.

NA~' Tie'>

  • 1 -

III. CORRECTIVE ACTION TAKEN WHERE PROBLEM OCCURRED A.

The structures are being addified to compensate for the in situ soil conditions using the following solutions:

1.

Underpinning by the use of caissons and piles for portions

'i of structures partially supported by fill N

2.

Reduction of residual settlement by surcharge loading the structure totally supported by fill e

E 3.

Elimination of the possibility of liquefaction of extensive sand backfill areas during a seismic event by installing a permanent devataring system I

3.

The earthwork specifiestion has been reviseds u.6.h suu 4_

M

.s___,

e specification now requires that both density testing and Dp gd ompaction methods be established which include the number of d

gry p

passes for a given lift thickness for all approved equipment.

j 4

C.

QC rewrote its inspection plans to implement the requirements in the specifications which included verification of equipment qualification.' QC also verified the methods used tu qualify

=

.Y placements.

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D.

A resident geotechnical soils engineer has been assigned to the site to oversee the backfill operation.

!~~

i E.

The soils testing laboratory has been made aware of all testing discrepancias and has taken actions to prevent recurrence.

i F.

All of the construction equipment to be used for. compacting F

j.

the various types of soils at the site has been qualified to a maximum lift thickness with a specified number of passes.

IV.

ACTION TO BE TAKEN BY BECHTEL PROJECTS l

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criteria for acceptance; i.e.,

h type of compaction equipment s to be ac c i

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thickness cod number of passes. The final acceptance :riteria are still to be based on testing by the appropriate ASTM acceptance standard.

B.

A project soil engineer and a field soil engineer should be assigned to each major project. The project soil engineer is assigned by the geotechnical services department and reports to the head of the soils group in the engineering office. The S

field soil engineer is on the project construction staff and reports directly to the construction superintendent. The

(

field soil engineer will be hired by Bechtel construction or retained through a subcontract with an outside organization specializing in soil engineering. g og gt engineering and the h

geotechnical services group will,c - the qualifications of the candidate for field soil engineering and monitor the m

adequacy of his technical performance. The p ad r

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anil enaineerm vill have the following duties UnW4Tws Sttp.4 e c.s.unwf estweet.uqan w w m u maa nea.

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b 1.

The project soil engineer's responsibilities will include, as a minimum, the coordination of all project soil engineering activities, the continuous review of soil-related construction activities, and the monitoring of the technical performance I

of the field soil engineer.

h 2.

The field soil engineer's responsibilities will include, f

g as a minimum, the monitoring of fill placement activities, O

testing laboratory activities, foundation excavations and M

pile and/or cassion foundation installations.

In addition,

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he will coordinate all soil-related activities between project engineering /geotechnical services and construction, j'

and forward progress r orts to project engineering.

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j C.

Quality assurance manua p(

ndor procedure manuals for the g

soils laboratory testing s ould be reviewed by geotech as well as project engineering.

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D.

A maximum limit of the number of times a proctor curve may be g (h used as representative of the material being placed should be w

established. The procedures manual should be reviewed by

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geotech o e sure that proper controls are outlined.

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'4 E.

To minimize errors in testing, the soils testing laboratory should include the following practices in its testing pro-cedures manual.

h 1.

Cohesive Soils - The moisture content of the field 1,

densities cannot fall outside the zero air voids curve for the respective specific gravity.

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Granular Soils - The stockpiled material should be tested for relative density by both the wet and dry methods as defined in the ASTM standards to ensure that the maximum density attainable will be used in placement.

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F.

Backfill Under Structures N

Toensurethatpropercompactionisobtained,thefrequency{g(

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of plotting proctor curves or maximum / minimum density 0

tests should be increased.

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2.

Consideration should also be given to performing static f

plate bearing tests as defined in the ASIM standards. The project or field soil engineer should have the option of I

requesting this type of test when appropriate.

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V.

ACTION TO BE TAKEN BY THE TP0 CHIEF CIVIL / STRUCTURAL ENGINEER t

A.

TPO Specifications C-441 Rev 6 and C-442 Rev 0 which are the 7;.

materials testing services specifications for both nuclear power plants and fossil fuel power plants are to be revised to g

(

eliminate the soils laboratory section.

\\

B.

New TPO soils laboratory testing specifications are to be issued by February 1,1980. In addition to the information F

i presently in TPO Specifications C-441 and C-442, these specifi-

]

l cations should be expanded to include the following items:

1.

Establish a limit on the number of times a proctor curve may be used as representative of the material being placed.

g 2.

Require a check to ensure that for cohesive soils the moisture content of the field densities does not fall outside the sero air voids curve.

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Require stockpiled granular soils should always be tested i

d for relative density by both the wet and dry methods as Y;

defined in the ASIM standards.

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GasquiF4 'Pase,gge gas to 40*MWow -118%ec. ofWtht<to#5 e C.

Reevaluate and revise hs necessary the soils sections of the t.

following TPO Specifications by February 1, 1980.

t 1

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C-033 Rev 1 Site Grading l

C-052 Rev 0 Pressure Water Piping, Furnishing and Installing C-053.2 Rev 1 Furnish and Installing Tard Fire Protection System C-054 Rev 0 Storm Sewer, Furnishing and Installing p.

pC056.1Rev1 Furnishing and Installing Culverts h

C-058 Rev 2 Constructing a Sanitary Sewer C-062.1 Rev 0 Circulating Water Pipe Installation (Steel)

C-062.2-Rev 0 Circulating Water Pipe Installation (Concrete).

C-314 Rev 0 Circulating Water Pipe Installation (Fiberglass) l 1, j C-234 Rev 2 Structural Excavation and Earthwork Construction C

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  • VI. FURTilER INFORMATION For further information contact C. Tuveson. Ann Arbor office, (313) 994-7727.

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VII. FUR 11tER C0QRDTMATTON -

Reevaluation'and modifiestions lo the TPO specifications should be coordinated with the geotechnical services department of the H&CF division.

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  • n Bechtel Power Corporation
n. W. Weht
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.I. F. LeBlane J. F. Newgen m East Emenhower Parkway W. G. Jones Ann Arbor, Michegan

1. Eeraseeon

'L. A. Dreisbach

,4, P.o. aan 1000. Ann Arbor. ukswenn atos E. Wiedner W. G. Maring P. A. Becnol S. L. Blue P. E. Eensen

5. E. Afifi E. A. Rumbaugh ANatARsOM i

auAuryAssuaAsma No,umher 16, 1978 1,

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rs Power Company Ldital Job 7220 v siINUATI(M of DIESEL F

jhy" enN TOR BUILDING WORE mr uo.

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G asference 3LC-6747, Martines to n

y 4-Eseley, Nov. 1, 1978.

'l Deer Mr. Esalays m

S This letter is to advise you of recent activities relating to the MidlanA diesel generstor building and modification.to the activities previously M.

identified in tha Reference.

s.

'TT h-A meeting was held with the soil and instruentation sensultants, Dr. Fock, Dr, Eendron, and Mr. D==1Af ff, on November 7,1978. Drs. Feck and Eendrom 4E.

strongly recommended surcharging the diesel generator building area to incur T

most of the settlement prior to plant operation, determine the effects of this settlemmat and then adjust building elevations as required. The alternate h

approach discussed in the Reference, of accepting the building's anticipated settlement, has two mejor drawbacks in the views of the consultants. First.

it is not fossible to predict the long term settlement from the boring samples y

due to the larga variation la sag les. The settiament will have to be predicted N

bened on soil monitoring. Sesood, if there are to be difficulties with the A

underground utilities dos to the settlemmat it would be better not to beve y

them occur when the plant is operating.

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Bechtel Power Corporation nC-a01 Constners Power Company November 16, 1978 Page 2 Based on the above reconnendation, our proposed activities in the Reference were outlined to the consultants. N consultants advised M ing the installation of soil instrumentation che highest priority so that a data base can be developed prior to applying surcharge. N y also advised using for greater effectiveness a louer depth of surcharge extended further from the building perimeter. They felt that approximately a 15-foot depth placed in increments of 10 and 5 feet with 20-foot bara placed with 2-to-1 slope should be sufficient but the soil monitoring data any indicate if more surcharge, a

w4

of 20-foot depth, or a longer consolidation time is required.

,q In addition, the consultants recommended that the cooling pond be filled to 3

its operating level of elevation 627 just after surcharge is placed, but

!4 after it was explained that the f4114=g any take 30 to 60 days they recommended

'! c proceeding with f4114=g the pond as rapidly as possible, m y concurred U

that construction should also continue on the structure to add load early in J.g the surcharge period.

1 Construction has been proceeding with the proposed activities. However, due I

bg to existing conditions some modification to the monitoring program before releasing electrical ducts is required. N south ends of the two condensate i

pipe encasements have been exposed. The condensate pipe centerlines ears found to be located slightly below the centerline of the encasament sleeves.

We will proceed to measure the. say at the top and to install vertical rods b-on the pipe and encasement to permit monitoring of any relative movement l-during surcharging. On the north ends we will be monitoring only the gaps from inside of the turbine building.

Construction will conduct the activities related to preloading in accordance with directions 1A ned by Project Engineering. Project Engineering will base iF the proloading plan on the constiltants' recommendations.

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While we have received approval to proceed with limited construction and are a-I proceeding to the point of concrete placement, we again request your approval to proceed with concrete construction of the building as soon as possible.

Very truly yours,

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F. A. Martines FAM/pp Project Manager

'i cc: Mr. D. B. Miller Mr. T. C. Cooka m

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H. W. Wahl P. A. Martines e, Bechtel Proj.Mgmt.

P. A. Becnal l

G. S. Keeley n, CPCo Proj.Mgat.

J. P. lab 1 sac September 7

,. 78 R. L. Castleberry j y,,,,

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i DIESEL GENERATOR SETTLEMENT 7220, MIDLAND 1 &

suene, so, u, J. F. Newgen S. L. Blue i.

Advised Keeley that our investigations show the diesel

}F building settlement problem to be potentially seriotis E. A. Rumbaugh and we feel it should be reported to the NRC under j-50':55(e) requirements. Altbaugh it is not clear that any K. Wisdner safety question would exist, the analysis is likely to be

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extensive and if remedial action has to be taken it could F. E.*Mayer also be extencive. The diesel generator building and foundation

  • are cu angineered fill and while indications are that the fill tested out satisfactorily when placed, it is apparant that some of this fill for some reason now B. R. Hubal does not noet the specified compaction requirements. Soil testing by a firm in Boston is expected to take about two P. K. Hansen weekds. Cur own top soils expert Ferris will be on-site on Septemler 12 and in Ann Arbor on September 13 and we R. Hermeston would be a ble to brief Consumers Power further after that j,

date.

L. A. Dreisbach l

Keeley indicated he had been following this problem and at W. G. Moring this point would ask his people to prepara a press release.

h He asked to meet at the Site on Thursday, September 14, at W. G. Jones 12 noon for further briefing and addressing potential

. solutions. Keeley concurred with Bechtel's investigative efforts to determine if the problem exists elsewhere on-site.

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y P. A. Martinez PAM/pp RECEIVED

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C0WFIDEHTIAL Bechtel Power Corporation Inter. office Memorandum To J. A. Rutgers o te November 20, 1979 l

sub>c November 13,19 se to From J. Milandin Question 23 NRC Midland Project of Quality Assurance Job 7220 i ;..

c e to At Ann Arbor

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H. W. Wahl P. A. Becnel f.

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hw Mw.ba4.w ULT iSLAi' 15 The purpose of this memorandum is to record a Bechtel position on a point introduced in the subject response by CPCo.

j.

During the finalization of the subject response on 11/12/79, and as a result is of the CPCo in-house review by Messrs. Howell, Keely and Marguglio on p

dovember 10. Mr. Marguglio directed that the following typical revision be added to the response to Part 1, in sub-sections 3.6, 3.7. 3.8, 3.9, and 3.10, following any reference to US Testing test results. The resision was: "--- test results, or satisfactory evaluation of the test results."

The purpose of this addition, according to Mr. Marguglio, was that CPCo did not wish to support a pre-enpted version of the situation involving test

+

results. His logic was that as written, without the revisdon, only the test results were incorrect. CPCo's position was that the lack of correct evalu-

+

ation of the test results could also have lead to the situation which placed a

reliance on the test results.

a I consulted with Phil Becnel and Jim Wanzeck of Geo-Tech concerning this u

-matter. We concluded that the statement implies that Bechtel was responsible for evaluating the test results supplied to us by US Testing. Jim Wanzeck's view of " evaluation" of test results implies that one would review the calculations and data used in arriving at the test results to assess the l

j technical accuracy of the report. Certainly this was not intended by Bechtel, nor, was it expected of the inspectors and field engineers who used these test results frem US Testing. They simply looked at the values that were called out on the report for conforinance to specifications.

m h[

I explained the foregoing to Mr. Marguglio, who did not agree with this in-t terpretation and insisted that the report reflect his revision.

I informed him that Bechtel's position was otherwise and, however, the report would be D3 issued as he had directed. I also pointed out to him that Bechtel has comitted A

in sub-section 3.10 to requesting US Testing to denent trate to the cognizant p-engineering representative that test procedures equiprnent and personnel used

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J. A. Rutgers Pap 2 of 2 for quality verification testing for other than NDE and soils wem and are capable for providing accurate test results.

I pointed out that this was, in effect, the proper interpretation of evaluation.

In view of this information, however, he maintained his position as previosuly stated.

As you recall. I informed you of this difference in interpmtation of the revision, and, as requested, I am doctmenting this for any further action you may consider appmpriate.

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h, MEETING NOTES MIDLAND PLANT UNITS 1&2 CONSUMER POWER COMPANY BECHTEL JOB 7220-101 DATE:

July 27, 197.9; 9:00 a.m. to 1:30 p.m.

PLACE:

Ann Arbor, Michigan, Conference Room 8(B)3A

SUBJECT:

Review Proposed Monitoring System with Dewatering Consultant ATTENDEES:

Bech el Consultants

3. Dhar*

R. Loughney S. Lo C. McConnel S. L. Blue

  • K. Bailey D. Wheeler
  • W. C. Paris, Jr.
  • Part-time ITEMS DISCUSSED:

1.

It was decided to monitor the fines at the subcontractor's return line where it discharges into the eductor tank, and monitor the ground water flow with a water meter at the subcontractor's dis-charge line.

2.

The water testing will be conducted using a 1-11ter Buchner Funnel.

4 3.

The individual dewatering welle will be tested monthly for infor-j mation only. The results will be givesto the on-site Field Geotechnical Engine,er.

i 4.

Any material removed from the subcontractor's eductor tank will be collected, and sieved over a No. 200 mesh screen. The sieved Portion will be examined by the on-site Field Geotechnical i

Engineer.

i 5.

All dewatering wells within the Turbine Building will be installed j

with stainless steel well screen so that they may be converted

?

to part of the permanent devatering system at a later date if i

necessary.

6.

Specific dewatering wells located outside the Turbine Building may bc installed with a 6-inch well screen upon approval by the on-site Field Geotechnical Engineer.

(f W. C. Pari, Jr.

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l Bechtel Power Corp ra ion Post Office Box 2167 Mediand. MicNgan 48640 g 02 M April 25,1979 U. S. Testing Company KARL Wt R

1415 Park Avenue

/

Hoboken, New Jersey 07030 Attention: Dave Edley

/

g/f Job 7220 Midland Project 7 W ~/C/

Subcontract 72y-208 Meeting Notes 2....

C-208-B-364

Dear W. Edley:

Attached for your information and files please find one copy of meeting notes for the jobsite meeting held on Monday, April 9,1979, at"Hoboken, New Jersey.

Very truly yours,

/.. (*

Pr S perintendent JFN/LFS/DLP/km Attachments s

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MEETING NOTES U. S. TESTING, CONSUMERS POWER CCMPANY MO BECHTEL POWER CORPORATION DATE:

April 9, 1979 PLACE:

U. S. Testing Headquarters, Hoboken, NJ

SUBJECT:

See Below*

ATTENDEES:

E. Basile U. S. Testing Company E. Zadena U. S. Testing Company E. Edley U. S. Testing Company M. Anzelmo U. S. Testing Company J. Speltz U. S. Testing Company B. Marguglio Consumers Power Company

  1. ? ',

D. Worn Consumers Power Company R. Wheeler Consumers Power Company D. Palmer Bechtel Power Corporation G. Richardson Bechtel Power Corporation I)* Ben Marguglio opened the meeting by establishins the following agenda:

1) Describe the problems relating to the Midland soils problem.
2) What U. S. Testing thinks may be the problem: where did U. S. Testing contribute to the problem?
3) What did U. S. Testing say to the NRC during the NRC investigation.

II) Ben Marguglio presented the following to describe the t;ypes of problems:,-

l

1) Inconsistencies in the SAR t
2) SAR Requirements not transla'ted accurately / clearly into the specifications.
3) Requirements for testing were not totally stated. Callout for proctor

'not total story.

~4) Interpretations were varied and not released through normal specification channels.

5) ' Client suspects thera was not a total understanding of the process by any one individual. Lack of expertise.
6) There may have been incorrect proctor selection.
7) There my not have been timely corrective action in identifying the extent of the problem and identification of the problem as opposed to fix.

5D163477

2 Subcontract 7220-C-208 Meeting Notes of Apr11 ;9,1979 Page Two i

8)

Accountability for inspection may have been lacking.

Who inspected What inspected How inspected, etc.

9)

U. S. Testing may have utilized to a sampling process without suf-ficient historical background on the process.

10)

U. S. Testing may have failed to qualify the test or the inspection process.

Ben added that all of the above contributed or could have contributed to the y

problem.

III) The main discussions during the meeting centered around the above. The following is a brief description of the important points of. this discus-sion.

1)

Ben discussed the conflicting test methods in specification C-210 and asked what U. S. Testing did to assure themselves that they had a clear Specification to work to.

U. S. Testing responded that their direction to use Bechtel modified proctor came from Bechtel as did direction of when to take moistures.

There was nothing in writing - direction was verbal.

U. S. Testing added that it was not their responsibility to determine when or where to take a test.

U. S. Testing clearly stated that U. S. Testing responsibility was fo performing the testing and not to inspect as to where and when testing is to be performed - this is, a Bechtel responsibility.

Question by Don Horn concerning moisture, compaction, and fitting of sample to the proper proctor was directed to U. S. Testing. Inherent error and judgement could be highly contributary factors in giving the wrong result.

U. S. Testing stated that variables exist within a sofis testing program

.that can cause erroneous data.

U. S. Testing suggested that the testing i

agency be given more autonony in making decisions.

It was suggested that possibly the testing agency would serve best if it were respons-ibile directly to the Client.

Ben stated that on Consumers Power Company jobs (future) he expects U. S. Testing to assure that specification interpretations / changes are obtained officially - and added that U. S. Testing Q A should not allow this +.o happen.

U. S. Testing responded that their Contract does not provide for this type of QA involvement.

SB16S478

~

Subcontract 7223-C-20t Meeting Notes of Apr1{ 9,1979 PagejThree 2)

Ben asked what type of mechanism U. S. Testing used to determine when a new proctor was required.

U. S. Testing responded that this was (is) normally triggered by the lab technician during selection of the proctor in response to a field test.

U. S. Testing added that there are no procedures to cover this operation; that it is a judgement operatior. that would be difficult to procedurize.

Ben sumarized the problem of direction during testing as being unsatisfactory and a more stringent direction process between Con-tractor and Subcontractor would be required, particularly that any change in test or specification changes must be received in writing i

prior to implementation.

3)

Ben asked who notified U. S. Testing when a new proctor was needed, i

U. S. Testing responded this was an ongof'ng item and proctors were taken as a regular thing and were taken at material changes and new borrows - again there were no procedures.

U. S. Testing stated that they could not remember ever being requested by Bechtel to take a sample specifically to develop a proctor.

U. S. Testing added it was not their responsibility to maintain the test frequency and that they were not privileged to quantity information.

Question of frequency revealed that:

1) 10,000 yard frequency test was not accurately followed as related to exact yardage being moved but was an ongoing check basis based on frequency roughly correleted with yardage - this was done because exact yardage movement was not immediately available to prompt i

the precise frequency implied by the specification.

U. S. Testing gdded they felt that they did more than their Contract required in:

Determining new sources and material changes where new proctors are i

required.

r Selection of the appropri, ate proctor to compare to the field density.

Over involvement with Canonie.

4)

Ben asked how U. S. Testing identified the proper curire to use when the curve may be six months old.

l U. S. Testing responded, they kept approximately 15 samples to be used.

1

Subcontract 7220-C-208 Heeting Notes of April 9,1979 Page Four Ben inquired what the field procedure was in determining when a new proctor is needed.

U. S. Testing responded that:

1) Judgement factor by experienced field personnel determines a large portion of the decision.
2) If characteristics changed, or a new borrow was started then an additional proctor would be made.

Ben added following statement:

For Consumers Power Company projects U. S. Testing should take the attitude that, in the absence of a controlled single source or specific designation for a change in soils, the most conservative

~

approach should be taken.

5)

General discussion on testing calculations:

A) Some conflicts noted in D. Horn's audits - U. S. Testing should consider.

'O' B) All test reports submitted to Bechtel Q. C. for review - does not include actual calculations.

C) There normally was not a plot of field test results on the proctor curves - no comparisons to zero air-voids curve.

D) If test plots on wrong side of zero air-voids curve there is an error (perD.Edity).

t E) Errors are inherent in test methods being applied:

Troxler has + 3%, error.

Results are conservative.

l 6)

Ben asked what U. S. Testing thought might be the problem - U. S.

Testing had no input.

7)

Ben asked if U. S. Testing had recommendations for future work - U. S.

responded:

s A) Take a look at the role you want the test lab to perform.

B)

U. S. Testing added'that it was Bechtel's responsibility to determine when a new proctor is needed.

l C) Review area of what is acceptable material.

Ben requested that U. S. Testing provide Consumers Power with testimodial information that was provided to the NRC during the interviews covering the soils investigation at Midland.

53169490

Subcontract 7220-C-208 Meeting Notes of April 9,1979 Page Five l

U. S. Testing inquired whether Bechtel would object to this release.

Bechtel Subcontracts representative stated that there would be no objection.

I The dialogue of these interviews is attached.

Prepared by:

D a n.'r E.0 O

'l-2/> -7f David L. Palmer Date

a.

J a go 8 s

I

.i 53169481 5

i.ccrex Abres Lis.

Heuxe Rams (Alits I rad 1.

t 6xisundts foWEE 0/fA'7//l' 2b/e 2ecemler6; ity Pbce -

/7/Anyucefee, Abw der /c'd si6)ed Pc'uieh bai bue.stfaba'i}v 2vchdGenecky Buido.9 aid 6/w Lkedere.s.

Guerdres

  • Ese4/e/

eks

&ow/ tad

/d ferds R(&ce/cr

  1. 8. 4:I-5 /////i d 7 u' se.co n fut/x e 5 oAhnh /eainsuc/sfa fem /de eswsa//sdem n

uansus-froskur re/atec/ to sarc/prye /asd'Q /be i:vn/s f< c/bers/mc/uresbiex / 6carater ode -

lai/t er is dc 6cn/ ari Jh,:t occu70// h Pcc4 dces Ace a cv)y of a//

/1.s so* il Asidy and euoi/od/o /el do/4

~

.lb ae/ d estafer Em M b 1.)heAar9e /saddf alony sWe 7Drdsc-kHdtiy wa a

(& surc/ stye.las ibosdan'A d 0nva/a s such as /Asse.r/Nzo ih ti e s. w e rsad>as rece s

k w/es o< 5;uty/ erb dert Ax/. //ss use (5%J.7)lIUfCl$Cr /N cy//b//d>3 et rest cose-whcaeslcu/ JAR l$'d 00i69524 C } F f3*

.w

/. ; _

0.)

Were there C.

prob 1 cms in coils nt th time?

>~

A.)

I believe that Ecchtel Q.n. nnd Concumcra Power Company Q. A.

.uere active in eniln durinr, thic time period (fall of 1976),

but I have no specific recollection.

Q.)

Is the BMP and type of materials specified for the. Diesel Ocnerator fill normal for construction?

A.)

I had no interface with Project Engineering and Design.

Showed QCIR.SC-1.05' (a Bechtel Q.C. report, form).

l *,.

.. ;~;

Q.)

Are you aware of 0.C. field activities and responsibilities in soils?

' e/

A.)

I am aware that they have a program and functions to fulfill,

..,.M ;.

but not of their specific requirements.

.s Q.)

Do you think that' Canonie was aware of the specification for

?

compaction and what it was being tested for?

A.)

I have no specific knowledge, but assume that they were aware

,.of their job recuirements.

Q.)

Was Bechtel working soils in addition to Canonie during this

t time period (1977)?

A.)

Yes.

Q.)

When did Canonic ouit working?

A.)

In 1977, there was a big push to be off site for deer hunting season which began November 15th.

5 Q.)

Why are you working to D-1557 now?

A.)

Q.C. direction with a memo from Cheek to Siple of 9/29/78 (copy attached).

Q.)

What is random fill?

A.)

It could be any of several types of material.

.'i

. o.. ' Q.)

Why would 'they call random fill ju'st clay?

Cheek to Siple memo was shown.

The statement " Random 7111.(Clay)"

.was pointed out.

i Q.)

If it could be other materials, why would he (Cheek) define it as clay?

Q.)

Did he know the difference?

A.)

My interpretation of this memo was that it was addressing testing and that he una distinguishin$ test procedures for granular vs.

cohesive soils.

Q.

Do you have anything you wish to add to this discussion?

A.

No.

55163483.

.l

~

~

a*

.r.

Dernie Thompson & Roger Smith I

HRC Int.ervieur of 1-22-79,& 1-23-79 7j bw A; -

s-,u Q.)

We.s it difficult to determine what proctor value to use by comparison to the Jar ssmples?

A.)

No 0.)

ho gave you the locations and elevations for the tests?

A.)

Cenerally the labor foremen or cometimes the laborers.

Q.)

Who selected the cite for the test?

A.)

The Inhorers would prepare the rite of the test where the fore-man eclected moat of the time.

In some instances we would celect, the exact site in the general area for which the test wac reevested.

C.)

llow often were either Q.C.,

or Engineering present at the time of the test?

A.)

Very seldom.

'Q.),Did 0.C. do surveillance on your test activities in the field on a regular basic?

A.)

No, not that we were aware of.

0.)

How often did they observe you doing the tests?

A.)

Very seldom.

Q.)

Do you kne. what their recuirements are for surveillance of soils'.'

A.)

No.

I have not had access to that information.

Q.)

Were they chort of people to do this work?

A.)

I cannot answer that question.

Q.)

Did they have qualified people for this work?

A.)

I cannot answer that question.

Q.)

Who was in charge of soils for Q.C.?

A.J Primarily, Daryl Osborn.

Q.)

Did he have other responsibilities besides soil work?

A.)

Yes.

To the best of my knowledge, he had other areas of responsihtlity.

Q.)

Were there grade stakes available for elevations?

A.)

Very seldem.

~

Q.)

How were elevations determined?

A.)

Mostly frem nearby buildingr. where elevations were written on the walls.

58tD9484 6:

~

M t.,

Q.-)

Were locutienn e, tab]iched by the use accurate measuring device:7 A.)

Nc.

hey were unually by walking off frem a wall or just eyetalli.sg the distance.

Q.)

Here lift thicknesses mearured?

A.)

Not in my prer.ence.

Q.)

Were the areas free of debris prior to the placement of fill n.aterial?

A.)

1 cannot answer that question.

C.)

Did 0.C. make sure.that creas were free of debris before placcuent?

A.)

I cannot n.nsucr that question.

Q.)

How were retesta done?

Did they (Bechtcl) supply you with

.' * ?

a enmple?

'A.)

Retests were taken by a technician as close to the original test as possible at the request of Bechtel when they felt the area was ready for a retest.

No, Dechtel did not supply us with a sample.

Q.)

Was special attention given to test areas?

A.)

Yeu, although not a cemmon occurance, I did feel that special attention t.as Given to test areas on certain occasions.

Q.

Can you recall such occasions?

A.

Yes.

Q.)

Would you dineribe such instances?

A.)

Roger spoke of a test on the 30" SWI discharge line.

Bernie mentioned a test in the same area.

'Q.)

Did the foreman asking for the. tests know the requirements for the frequency of tests?

A.)

I cannot answer that question.

Q )

Were lift thicknesses reasonable or were they excessive?

A.)

Generally yes, however there were occasions that they were not.

'Q.

How was the moisture controlled prior to placement?

A.

Prior to August of 1977, there was no control of moisture

~

prior to placement.

After that date until the spring of 1978, one moisture was taken in the morning from the stockpile.

Q.

liow was the moisture reported?

A.

The moisture was Given.to Q.C. and Engineering.

Q.)

Was the moisturn associsted with a proctor value?

A.)

No, it was not at this time.

58163485 M

NHC DIESEL Gi:....alATCH LiU11MNG SOIL i INV JIGATION at the Hidinnd, Michtcan, Project Site Interviewerc:

Gene Gn11nr,her, !!HC So11n Specialist G.A. Phillip, liiiC Invectication Specialist Interviewee:

2 John Spelt, U.S. Testing Site Project Supervisor The followinr, notes were gencented from notes token by John Speltz durinc, an lutcrview in the Consumers Power Company conference room on 12/14/78.

i Q.)

Did you see a conflict in C-210 (carthwork specification) between EMP (Bechtel Modified Proctors) and ASTM D-15577 A.)

Yes, there was on 0:rca of concern in section 13 s

i C.)

What criteria were you working to?

.A.)

The EMP, as indicated on our reports.

Q.

What is your period o'r activity on site?

A.

Since December,1976.

,'6/10/74 was shown.A letter to Church (Subcontracts) from Valenzano (Engineeri Section 13 7 of C-210 was pointed to in the letter.

Q.

What does modified Proctor mean to you?

A.

ASTM D-1557 modifying ASTM D-698.

Q.

Do modified Proctor, BMP, and D-1557 mean the same?

A.

No.

Q.

Docs EMP and modified Proctor mean the same?

A.

No.

Showed telecon Hook (Bechtel 0.A. bnsite) to Rao (Ann Arbor, Project Enginecr) g), October, 1977, and telecon Teague (Lead Civil FieVd Engineerin i

to Rao, October 10, 1977.(copy attached), noting that either D-1557 or BMP can be used.

Q.)

What was your source of direction on this?

A.)

V.crb :lly, os mentioned in a note on top of the original of the telecon.

1 0.)

Do you feel Hook or Teague were responding to you (John Speltz)?

A.)

No, not to me directly.

C.)

Who would respond to you with this information?

A.)

Dechtel 0.C.

dd '#, 77 Q.)

Why la the response so late?

A.)

I have no information on that.

4.)

Were there other arens where coil work has going on'?

A.)

What worl: nre you referring to?

9 I

-s uss4m y

$$('ax2s Ndtk/$cd f/ial0 /2clihp7e/er

)

6.

ou/ wit pife woa/d k ared to frotec/

/Ae th rods d/4 the rods)heedohny tk suut of /de/p>

lume coxtete A/sch, frofer/y desysef c.

couldde used'os a yro'atj we// to tetair) Ade ear /h a/sMy /nebejds 6wZ4j z.) Et is sat essa <y 4, Jteos e,t Me inos/sist m the c/kre/ pratse foil /sy defre /desur-daife / ooc /it off/ icd

3) Tk estrest desgbv ir hsadon on o,h6e, shit 4 tojet ofsackiye s&eyesse..zares,e,e of fre/ cod may k /sfeet owe the ej)c/eaca, nw?ce sett/enw/>

> aos aeeA, /Jen add:r more /el of ///, mondo y oso//w ajeef and jii,oity si cfeet of tisa/jis.

<) irens -,casorens spa &,2, a a

.r t-to k toIenlrefuenily. Mm,6erafare estrecbdj.r

,i are est nee:rary?. Lad /h onAest as teny{ era -

Iare sAou/d k recsedaf.

h fekand inessores:esh s&senW k //e(Jj ?/ id fre-l ditay /4 sai/ siada/us as/us.1j&rwhma sin-I dyar 5B169525 c:) dbf<25 sweiof sc/r of frodd.r of /de sie.i:.we-y iiralJeutics Afie fichij ij oddse grade y

p as/4 f/:e sardurge 7)Ecuray co)a'sf sAou/dnot Ac a jro6bn. /chshas/d deterside /he oog/e af dterna/,f dtw;, for ths.roi/

ri basedon fre/oa/4y/ud idshfe /de d ydtco<

kurmy coflaciy cismjf>nnu/a. whs

//iejround /sor s iy.Inves/p/s a

overAurden and tAe ong/e of isterna/lrdlisii on a)e// us the esbestbri.

3

8) bi A/ does ret esosider it'secessant to cordec/

o zo)/s bormj froyrom q//er rentsumj Me sur-charfe Ne niac, eossWer Avnd c/iji l<st jit to eaufuate bcursy es,403,)jis

/ L, Ms we of )scfel pendVcive/er oad / dad les/iry

't) ///knule 30/uliks :

a) In the eoest /Aste ir a icaeiikj esja:Jy ftobhn af/er jie/cahnj,k. It inay de a instfundotwi i

cou/dreso/ue /k yestic cafe ks haue a stut u&sfn m/diXsd/e-

6) Oblasi s discedsiensdria/5fbcre/de aad under //itj//>e conAun-$d r6 cord bando4:>i A loco /cd. lA P l
  1. 1c bsru.ys and t,

'.Oeferinke //7e roul04/4f of /44 saed.

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GNo feller is /! A&rtibez, dotedtr-7-7s aui trerY discusscd. Gordssole aloler hde ednerele enw>rincat nim / Le o) Genba/ ad//] //e 4:yyd/iy 5816958 Mi t

samfon the scufA sN'e of //

7Udq.B/ntc/

s)ct svy kprmrdadibA cou/a'eause /Ae dai/ddng ts hany o). El asa4(a))ctre desirccib/e, e/rre fbe dati bonk cones m contact wiA the giiv),

is eat t!ie dust ban.E /xse. This choaB&is -

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vestiyated s more de/ai/ cr k monitored daniy wstsHoboi of the sarc/arge-n) BailakQ cracks shee/d k n:a/pd be/src and

~

affer fre/oaddy.

is)

Pathna/e rbe jiha/ /aad wi// 6e smi//er /han the wec/>s<je ibaat ZL shoattkpssd/& A oA-laid ao a}

asas sssay}er bkit c/j'ature sett/eoren/>

sa e,as ise,esconspanps-

/casty

_d /her / Press of /he Sile h Ndr?.'!c(m& /cu 1$alIdns 'scu/l7Ol /arb/NY SP//S 7//dAc$/lement data and thesc t

,wie reu4eakt/- Z differents/sett/eme/>&

deoe/oh 2 wit / e /mese of /beJrsprths c/ A9e s/n//sai sads, /derejbre c7 /ov sarchary i

wou/dk/. 2k Pecf recsinaded Hisi/de trans)rm)es)ods te surc/veyed sihr; / sad andm adkion sfeet af sci /de 9

e/xd fs sarchorp the teniawder f/bekans-o ormtr Jouns&diaiJM Prdr to sardutye sa1ses27

/c~u/dy?ebecnanf1 'the owigfechter asi //

otusab oj differentid/ monineni /he Lay con accomedote ans'/Ae ti/Amy theins.frur-I inct een cosi/)stenc7 z) E2nf faim, do<th c) /9ad/<a're/ Buih4de TAs itos krated watersforbge tents ere C'hss /, d/WHe o/Asr his tonh /cartedh

/be center f /he tes/< erm arei7st e/asu/.

T/e r& fondotkn.slokstofedons' o

7 tlei>> ens are nooda/. rap 2s coo k used Jarpie/sadihy /besoi/. Msnit' oe/be sett/e -

ine<it of the desh andcAeed ideJi)uji-The fi/s may rar/ to de as}astd:f c//er y

festhy. The awter mas de reyarled te be /e (sever /t w /Ae tae/s oranelteirles(p,,bd a/ Weefs)unti/ o xtt/einei>t carce io esta6/hhed The yrduiv'ahter.sAsa1/o/se) k inonitcred' 6/aiinj /4h,tbridd'

.i s) Guard /huse l

Yhe so,/ 4ois s,,xheated fut //}einoteri;i/

y "ndcr /Ae i

a fi/clou/dandatich shou /s'4e rein l

naa' lish k usect. hnte //-)i/e.s 1

efeet into ise en

+

M

/) Bu//sck &te/c Aje Ende t/sc,6//ejbanddtii>0 SB169528 M

l.

(

' )

r) Eadaune Bundin9 1

35'lthmen(9 are on/q rido?ik/Gl/8/9 tishe, eentibus ts moni&cr. #/fre. rest, tuoc-tids & ref u E e d-

4) Pelossie do//s The'borkys ds nstindidate any OcWiEhnaf

)tob/eas are fa te es/eded' TAerefore msnitcr sett/eirewt h nsrina/mooner.

7) G/cthagind fai/dinq The sujetstradute a dear 4j4L, ors'de knys clo ost &diiete /dalonq odshbishe/

oclion needs lo de Loko a) C'crden. rale 3/sto.p fonh 7//c borSys c/d indidode /bdi/berd' /S a prob /em. TAe i#irsettheyorder M Caln aleifbl.

b/niNr}<G/0ochnf/89 icok oreo. ?)ecide c>i february /$1979, i

a ler revieaunj 2)sse/ Generator da' te, Jre/oadary must k clone Pre /oadib,

i 7

i reyaded; s/wu/d ertend to o dhlance of 20} eel }crn //le tanks a

_~

9 5B169523 A'

M

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)

i

~

g-Bechtel Associates Professige_$fegtporation g

Inter-office Memorandum AUu 0 61979 5

II KARL WlEC/MErt l.5 To R. L. Castleberry Date 3 August 1979 g

a

!.}

S6bject Midland Units 1 and 2 From 3, g, ggggt 3

Job 7220-001

}

NRC Meeting July 18, 1979 of Geotechnical Services

g M

Copies to S. L. Blue w/o At Ann Arbor 10 D 5 g

H. H. Burka/W. R. Ferris w/a 7220-79-145 g

J. O. Wansack w/a q

P. A. Martines w/a a

K. Wiedner w/a

- M 1320, 3130 s

Ej

REFERENCE:

IOM S. S. Afifi to R. L. Castleberry, dated July 25, 1979

g a

b

- f-Attached you will find C. H. Gould's sunmary of his presentation at the July 18, 1979 meeting. This has been re-written and the summary

g*

presented on the above reference is superceded. I understand this was jjji requested by Mr. Keeley of CFCo and should be transmitted as soon as 5

possible.

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Attachments

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Ramrlial Measures Ftr Electrical Penetration Areas and Isolation V2

-m l

Mis is a brief swi. on the r <wi rei i

pi.-Lot.icn areas of the =t-414=y buildif i

pits. Se objective of the remedial mm of a questionable measure as evidenced by the renmMal measure has the objective c/

capacity with structural alsnants which; foundaticos to L. 5erlying undisturbed p

2. ',

m to existing structures and M-=amilen this it is planned to utilize the strir?

4cleberr'.

to bridge over mana of the questionabls

""W*e*

yq- - <

<24 = ms at the extremities of the el ?

Jg (NOLUn1Ess f shall have sufficient capacity to supg

% q,'

.n c y,*tini July '73* 1 D and live loads of the electrical perxzt-being %uul by the control tower ).

% to s, t l

the isolation valve pita is to tar:pers.

3. g' U "* N/o '~

r J, o 3%/V. ? R.,

mine them by reicnring all materials t#

f.

till is encounteral and filling the d p, a ' "Drech v/a y,-"I8 v/4 i

I, fg fue:t via 2e plan of attack for perfr=4M thf 134 Or w/a 1.

Iocally dewater the soil abovel D J3c'.

UN S S. g D' A l It is essential that the loosef-excavation under the structurd dewatering systen shall be irii-of any excavation. Out dewati.

    1. tac.b d yo" majority of the eductors willj' the July 23

.f4 :dt,' g, C uld' f '8ented $ M A 2'eting.! g 8 bam' turbine N41dimy. S e discha; abovr W

'894ested b w e

2.

b W arily support the isols

W8sible,

- Keeley of [CDC* 1w :

spanning between the buttrex add well at the ground surface.

g j

3.

Excavate an access shaft adjc j

"/nD of wswdmately 7 feet bele

  1. Ut3Cnents J

would then ed laterant extrane edge of the electrit I

4.

Install jacked caissons a

-j area foundation as the rehk for the following reasonai j

It will be possible@7 a.

excavating natorial) ground fran under th:

and buttress accM-i

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if backfin area, m s '

j provides man-si oyc

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5-Bechtel Associates Professiegjpqgeration Mj inter-office Memorandum AUu 0 61979 nf3 KARL WlEWEi!

g To R. L. Castleberry Date 3 August 1979 w

[j Subject Midland Units 1 and 2 From S. S. Afifi 3

Job 7220-001 NRC Meeting July 18, 1979 Of Geotechnical Services s

Copies to S. L. Blue w/o At Ann Arbor 10 D 5 g

H. H. Burke /W. R. Ferris w/a 7220-79-145 g

J. O. Wansack w/a g

P. A. Martines w/a

.;g K. Wiedner w/a 3

1320, 3130

.=

m

REFERENCE:

IOM S. S. Afifi to R. L. Castleberry, dated July 25, 1979

. m. =

5

.[5 a.

Attached you will find C. H. Gould's sunnary of his presentation at 3

the July 18, 1979 meeting. This has been re-written and the sunnary 3o presented on the above reference is superesded. I understand this was h

requested by Mr. Keeley of CPCo and should be transmitted as soon as 5

possible.

bS fi N

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( Attachments 5

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Pa==94=1 Measures For Electrical Penetration Areas and Isolation Valve Pits l

This is a brief report on the m-M r==wi4al measures for the electrical penetratica areas of the anv414=vy bi41 ding and the adjacent isolaticn valve pits. The objective of the raw =94=1 measures is to replace bearing capacity of a questionable measure as evidenced by soil sampling data. The design of the ra==94=1 measure has the objective of rselacing the suspect soil bearing capacity with structural elements which extend fran the existing u.uune foundations to underlying undisturbed glacial till while minimizing disturbances to existing structures and constructicn operations. In order to acccuplish this it is planned to utilize the structural capacity of the penetration area to bridge over same of the questionable underlying materials by providing caissons at the extremities of the electrical penetration areas. These caissons shall have sufficient capacity to support approximately one-half of the dead and live loads of the electrical percL.ation areas with the renaining one-half being supported by the control tower area. The proposed method for suw.u. Ling the isolation valve pits is to tarporarily sugx:trt then in place, totally urder-mine then by retoving all materials to a depth at which. undisturbed glacial till is encountend and filling-the excavation with lean concrete.

The plan of attack for performing the work is as follows:

1.

Iocally dewater the soil alove the glacial till in the affected areas.

It is essential that the loose granular soils be dewatered to permit excavation under the structures without significant loss of ground. The dewatering systen shall be installed and the water drawn down in advance of any excavation. 21e dewatering systen is a curtain cut-off type. A majority of the eductors will be installed frcxn the lower basenent of the turbine bi41 ding. The discharge will be monitored for piped fines.

2.

Tauporarily support the isolation valve pit by the use of needle beams spanning between the buttress access shaft and turbine bi41 ding foundation wall at the ground surface.

)

3.

Excavate an access shaft adjacent to the isolation valve pits to a depth of approximately 7 feet below the bottcm of these pits. The excavation

~

would then proceed laterally as a drift until the excavation reaches the extreme edge of the electrical penetration area.

4.

Install jacked caissons at this location utilizing the electrical penetration area foundation as the reaction. The jacked caisson method has been selected for the following reasons:

It will be possible to jack through loose sands and soft clays without a.

excavating material frun within the caisson thus preventing loss of ground frcm under the electrical penetration area, turbine biilding and buttress access shaft.

b.

It is known that there ve sizable concrete obstructions in the backfill area which will be encountered by the caisscns. A caisson provides man-size working reca for demolition of the concrete obstructions.

S n.70010 M

(

Likewise, the man-size working rocn of the caisson will pe. unit c.

direct excavation of highly ca pacted sands and/or clay as well as the glacial till (caissons penetrate the glacial till a mininum of 5 feet).

d.

The caisson provides access for direct visual inspection of the glacial till for the initial detezmination of bearing capacity (final bearing capacity is by load test).

5.

Concrete the caisson and load test same.

a.

Ioad test one caisson under each electrical penetration area at 2.0 times design capacity.

b.

Ioad test each caisson individually at 1.5 times design capacity.

c.

Ioad test all caissans as a group at 1.0 times design capacity or 1/4" of vertical structure movanent, whichever ca:urs first.

l d.

Upon empletion of any tests the caissons are to be left in a pre-stressed state to prevent any settlement.

6.

Install support of excavation systen along the turbine bi41 ding foundation wall and connect it to the access shaft and the jacked caissons. The jacked caissons which were previously installed urder the electrical penetration area will tarnporarily act as support of excavation for the excavation under the isolation valve pit. The containment structure and the buttress access shaft form the remainder of the excavation enclosure under the isolation valve pit.

The support of excavation systan along the turbine wall foundation will also act to:

a.

Support the tanparary additional load imposed on the foundation wall by the needle beams which support the isolation valve pit at the surface.

b.

Support the turbine bi41 ding vertical loads within the zone of influence of the excavation under the isolation valve pit.

7.

Excavate all material frun underneath the isolation valve pits to a depth at which undisturbed glacial till is encountered.

l 8.

Fill the excavation under the isolation valve pit with lean concrete I y

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backfill to within 7 feet of the existing foundation.

9.

Place structural concrete in the drift under the isolation valve pit and the access area used for installation of ca4=mns underneath the electrical penetration area.

l 10.

Dry pack and transfer isolation valve pit load to the lean concrete backfill.

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l h design of the m4=m is based upcn a very conservative caisson tip pressure of 25 kips per square foot (ESP) for straight sided caissons. This provides a tip load intensity of approximately one-tenth that normally associated with jacked piling, and will bring the long tem settlement into line with expected settlernents of the balance of the auxillary bs41dMg. The bearing strata pressure is limited to 20 RSP for st_aight sided caisson. If the bottm of the jacked caissons are belled in the glacial fill, the design tip pressure is IdaM to 17.7 KSP. h bearing strata pressure associated with belled caisscms is not relevant. h steel shells for the jacked caissons are neglected in mim1= ting the structural capacity of the caisson.

h bearing pressure en the glacial till below the isolation valve pit is only ncmdnally increased by the substitution of concrete for earthen fill.

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