ML20135J007

Summary of 850905 Meeting W/Util,Bnl & Ebasco in New York,Ny Re Progress to Date in Confirmatory Analyses for Common Foundation Basemat.List of Attendees & Viewgraphs Encl

ML20135J007
Person / Time
Site:	Waterford
Issue date:	09/13/1985
From:	Joshua Wilson Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8509250127
Download: ML20135J007 (37)

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UNITED STATES

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i NUCLEAR REGULATORY COMMISSION 3#,

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E WASHINGTON, D. C. 20555 o

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%, ~. f Sgp 13 E85 Docket No.: 50-382 LICENSEE: Louisiana Power and Light Company FACILITY: Waterford Steam Electric Station, Unit 3

SUMMARY

OF MEETING TO DISCUSS CONFIRMATORY ANALYSES FOR COMMON FOUNDATION BASEMAT AT WATERFORD 3 1

A meeting was held on September 5,1985 in New York between the NRC staff and consultants (BNL) and LP&L staff and consultants (EBASCO) to discuss the progress to date in the confirmatory analyses for the comon foundation base-mat at Waterford 3.

A list of attendees at the meeting i.s attached as Enclosure I.

The handouts / slides used at the meeting, which focused mainly on the construc-tion sequence analysis, are found in Enclosure II. Regarding the construction sequence analysis, it was concluded that construction sequence evaluations should be carried past the last block placement (i.e., should examine behavior as rigid body motion). This should be no more than several months past the last block pours as allowed by data. The incremental analyses should address:

estimates of construction / settlement induced stresses estimates of peak steel strain / stresses address whether shrinkage was a real or insignificant problem, particularly with regard to the base mat restraint (;uestion conclusions on whether cracking done or does not occur and the basis for the conclusions.

A brief discussion of the overall confirmatory analyses program resulted in the following recommendations:

Examine horizontal coupling of mat and reactor building and discuss why it was not evaluated.

Discuss how P wave was handled in the soil structure interaction evaluation.

Discuss what the frequency cutoff (12 Hz) was based on.

Discuss the Westgard theory on water pressure to define why it is conservative with regard to.the effect of compression on the mat.

(Reference was made to some data on dams in the '60s.)

Further discussion will establish the extent to which these recommendations should be included in the final report.

The basemat monitoring / surveillance program, which accompanied the February 25, 1985 confinnatory analyses program, will be reviewed by the NRC staff and 8509250127 M3302 PDR ADOCK PDR P

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, BNL prior to the next meeting. The next meeting should be planned for about mid-October when computer runs of the analyses are available, h/

James H. Wilson, Project Manager Licensing Branch No. 3 Division of Licensing

Enclosures:

As stated cc: See next page i

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9/// /85 9//t/85 l

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Mr. R. S. Leddick Louisiana Power & Light Company Waterford 3 cc:

W. Malcolm Stevenson, Esq.

Regional Administrator, Region IV Monroe & Leman U.S. Nuclear Regulatory C.ommission 1432 Whitney Building Office of Executive Director New Orleans, Louisiana 70103 for Operations 611 Ryan Plaza Drive,-Suite 1000 Mr. E. Blake Arlington, Texas 76011 Shaw, Pittman, Potts and Trowbridge 1800 M Street, NW Carole H. Burstein, Esq.

Washington, D.C.

20036 445 Walnut Street New Orleans, Louisiana 70118 Mr. Gary L. Groesch P. O. Box 791169 Mr. Charles B. Brinkman, Manager New Orleans, Louisiana 70179-1169 Washington Nuclear Operations Combustion Engineering, Inc.

Mr. F. J. Drummond 7910 Woodmont Avenue, Suite 1310 Project Manager - Nuclear Bethesda, Maryland 20814 Louisiana Power and Light Company 142 Delaronde Street New Orleans, Louisiana 70174 Mr. K. W. Cook Nuclear Support and Licensing Manager Louisiana Power and Light Company 142 Delaronde Street New Orleans, Louisiana 7017.4 Resident Inspector /Waterford NPS P. O. Box 822 Killona, Louisiana 70066 Mr. Jack Fager Middle South Services, Inc.

P. O. Box 61000 New Orleans, Louisiana 70161 Chairman Louisiana Public Service Comission One American Place, Suite 1630 Baton Rouge, Louisiana 70804 l

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... _ ~ -...

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Enclosure I LIST OF ATTENDEES AT SEPTEMBER 5,1985 MEETING ON l

CONFIRMATORY ANALYSES OF COMMON FOUNDATION BASEMAT 4

)

NRC P. T. Kuo J. H. Wilson BNL C. J. Costantino C. A. Miller f

LP&L i

2 R. F. Burski K. W. Cook C. J. Holley, Jr.

EBASCO S. J. Chen R. Cheng P. C. Liu S. G. Prussman A. Wern i

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a ENCLOSURE II LOUISIANA POWER & LIGHT COMPANY WATERFORD SES-UNIT NO 3 BASEMAT CONFIRMATORY ANALYSES CONSTRUCTION SEQUENCE ANALYSIS NRC/BNL MEETING: SEPTEMBER 5,1985 AGENDA I. PURPOSE OF THE MEETING-A Wern II. GENERAL DESCRIPTION OF THE ANALYSIS-A Wern III. GENERAL METHODOLOGY-S J Chen IV. FINITE ELEt1ENT MODEL-S J Chen V. DISPLACEMENT DATA EVALUATION-S J Chen VI. MATERIAL PROPERTIES-P C Liu VII. SPECIFIC ANALYSIS PROCEDURE-S J Chen VIII. PARAMETRIC STUDIES-S J Chen IX. EVALUATION OF RESULTS-S J Chen I'

X. DISCUSSION OF CONFIDENCE IN CALCULATED RESULTS OF CONSTRUCTION SEQUENCE ANALYSIS-A Wern

PURPOSE OF MFETING FOLLOW-UP TO JULY 19 MEETING PRESENT PLANS FOR PERFORMING CONSTRUCTION SEQUENCE ANALYSIS PRESENT RESULTS OF PRELIMINARY STUDIES C

RECEIVE NRC/BNL COMMENTS ON OUR PROPOSED ANALYSIS l

f I

226ML CONSTRUCTION SEQUENCE ANALYSIS PURPOSE - DETERMINE ' LOCKED IN STRESSES' IN BASEMAT MAT CONSTRUCTION SEQUENCE TIME SCALE OF CONSTRUCTION TIME STEP ANALYSIS USING MEASURED DISPLACEMENTS OF BASEMAT DURING EACH TIME STEP CUMULATE BASEMAT STRESSES FROM EACH TIME STEP TO OBTAIN " LOCKED IN STRESSES" ADD TO STARDYNE DERIVED BASEMAT STRESSES FOR COMPLETED STRUCTURE COMPARE STRESSES TO PRESENT BASEMAT CONDITION COMPARE CRACK PATTERN FROM ANALYSIS TO OBSERVED CRACK PATTERN l

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GENERAL HETHODOLOGY A.

GENERAL FLOW CHART OF ANALYSIS

- STEP BY STEP EllFORCED DISPLACEMENT ANALYSIS (VERSUS S0Il SPRING APPROACH)

- MATERIAL PROPERTIES ARE CONSTANT FOR EACH STEP BUT VARY FROM BLOCK TO BLOCK

- ADD liEW BLOCK AT"EACR STEP (TOTAL 0F 28 BLOCKS)

- FLOW CHART FOR A TYPICAL STEP B.

COMPUTER PROGRAM - HSC/NASTRAN

- QUAD 4 ELEMENT - IS0 PARAMETRIC QUADRILATERAL ELEMENT INCLUDING TRANSVERSE SHEAR FLEXIBILITY

- ISOTROPIC MATERIAL PROPERTY (MATI) FOR UNCRACKED ELEllENT WHILE ORTH 0 TROPIC MATERIAL PROPERTY FOR CRACKED ELEMENT (MAT 2) r

o FLOW CHART FOR CONSTRUCTION SE0VENCE ANALYSIS ELEMENT CRACK t

DATA BASEMAT FINITE ELEMENT SURVEY MODEL GENERATION DATA n

MSC/NASTRAN 9

CALCULATE ACCUMULATED ACCUMULATED RESULTS RESULTS FOR REACTIONS FROM PREVIOUS STEPS

' ELEMENT FORCES & MOMENTS.

9 No(CONVERGEDFOR'tYes f NEW CRACKS 7 (NEW CRACKS?

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STORE THE ACCUMULATED RESULTS 1r PRINT AND PLOT RESULTS-d

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FINITE ELEMENT MODEL

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3 X 3 ELEflENT ARRAY PER CONSTRUCTI0il BLOCK

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DISPLACENEiiT IllPUT AT C0llSTRUCTI0li BLOCK CORllERS 011LY s

- SURVEY DATA 014LY AVAILABLE AT CORNERS

- PROBLENS OF.DISPLACEMEllT INPUT AT ALL 110 DES C.

TIME STEP ANALYSIS DESCRIPTI0l1

- C011STRUCTI0ll BLOCK PLACEMENT DATES SETS ANALYSIS TIME STEPS

- RELATIVE DISPLACEMENTS USED

- CONCRETE MATERIAL PROPERTIES DEPEllDENT ON AGE OF CONCRETE D.

ITERATION METHOD FOR C0llCRETE CRACKING AllALYSIS e

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LEGEUD:

r CoucRETE PoWRlWG DATE.

v.

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$URVEY DATA DATE SELECTED.

!j ssAsco camicas esecoseronavun Lout $tAMA Pou/ER& LIGHT CO.

WATER FORD STE AM E.LLCTRC ETATKni UurT3 l

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DISPLACEMENT DATA EVALUATION A.

RAW DISPLACEMENT DATA SOURCE AND ORIGINAL PURPOSE:

MONITORING 0F GROSS SETTLEMENT OF BASEMAT AND CONTROL Oc DEADWEIGHT LOADINGS LOCATION AND FREQUENCY OF DATA POINTS PRECISION OF SURVEY DATA DATA MEASURED TO 0.001 FT llITH POSSIBLE ERROR OF 10.010 FT B.

DEVELOPMENT OF DISPLACEMENT INPUT DATA TABULATE SURVEY RAW DATA (ELEVATION)

DATA Al JUNCTION CORNER FROM NEIGHBORING BLOCKS TIME DOMAIN INTERPOLATION SPACE DOMAIN INTERPOLATION i

WATERFORD SES UNIT NO. 3 BASEMAT CONFIRMATORY ANALYSIS CONSTRUCTION SEQUENCE ANALYSIS MATERIAL PROF _ERTIES A.

CONCRETE STRENGTH COMPRESSIVE STRENGTH, (F PSL C

T 1 & 3 DAY STRENGTH - DESIGN MIX 7 & 28 DAY STRENGTH - TEST DATA (465 SETS)

STRENGTH BEYOND 28 DAY - PROJECTED REF.

FIG 13.1, P.270, ACI PUBLICATION SP - 27 STRENGTH GAIN CURVE - AVERAGE (FIG. A)

TENSILE STRENGTH, (F PSI CT T (FcT}T =64(F$)T REF. 1. 14.3, ACI 207.2R - 73 2 $ 9.5.2.3, ACI 318-83 B.

MODULUS OF ELASTICITY CONCRETE, (E j

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c WHERE, W = CONCRETE UNIT WEIGHT, 140 #/CU.FT.

REF. P260, SP-27 t

REINFORCING STEEL, E s

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E

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1 l

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2.

C.

POISSON'S RATIO CONCRETE, ( F )T C

P = 4 F ' /350 C

C REF.

P97, " THEORY OF PLATES AND SHELLS" BY TIMOSHENK0 ETC.

ASSUMED:

(V)T = d(F'}T / 350 C

C REINFORCING STEEL, F'S = 0.3 D.. CREEP COEFFICIENT, CT C

= CREEP STRAIN T.

INITIAL ELASTIC STRAIN T.6 0

=

10 + T.6 Cu O

WHERE, T = DURATION OF LOADING (DAYS)

C = ULTIMATE CREEP COEFFICIENT u

= 2.35 (AVE CONDITIONS)

REF.

1.

P15, " REINFORCE 0 CONCRETE DESIGN" BY C K WANG;C G SALMON 2.

PP 260-267, SP-27 E.

SHRINKAGE STRAIN, (6SH T

( SH T

( SH 35 + T

WHERE, T = TIME AFTER PLACEMENT (DAYS)

(6SH}u UIE MNE NE 510 x 10

IN/IN (FOR 70%

=

HUMIDITY)

REF.

PP 260 - 267, SP-27 1

3.

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experimental data from References 16 for different weight concretes (using both moist and steam curing,and types I and ill cement). Where three data points are shown for a given age, they refer to the upper and lower limits and the average value for a given set g

of data. Where only one data point is shown,the range is too small to indicate. Data y

for 88 specimens is includesi

,y 4

SI'ECIFIC Ai1ALYSIS CONSIDERATION A.

EFFECTS OF C0llCRETE FLEXURAL CRACK i

- EFFECTS OF CRACK Ii1 ONE BLOCK 011 OTHER BLOCKS ARE IMPLICITLY INCLUDED IN SPECIFIED DISPLACEllEliTS.

- AT THE CRACKED ELEMENTS THE ACCUHULATED M0 MENT WILL BE ADJUSTED BY THE RATIO 0F ICR/I.

THE CRACKED MORENT i

INERTIA ICR WILL BE DETERMINED BY CONSIDERIllG C0ilCRETE TEllSILE STRENGTH AllD DEPENDEllT Oil THE ADJUSTED ACCUMULATED N0 MENT.

- USE 0.5 AS SHEAR STIFFilESS RETEl! TION FACTOR FOR THE CRACKED PORTION, B.

EFFECTS OF C0llCRETE CREEP

- ESTIMATE CREEP STRAlii RATIO DUE TO THE PREVIOUS ACCUHULATED LOAD WHICH IS TREATED TO BE LINEARLY IllCREASED WITH REPSECT TO TIME.

THE FORCE AliD MOMEitT ACCUMULATED BEFORE THE I

CURREllT TIME STEP WILL BE Kil0CKED DOWil FOR EFFECT OF AB0VE CREEP STRAlli.

- ESTIMATE CREEP STRAIN RATIO DUE TO THE LOAD FOR THE CURREllT l

TIME STEP.

THE CONCRETE YOUNG'S MODULUS USED IN THE iiODEL WILL BE KNOCKED DOWN FOR EFFECT OF THIS CREEP STRAIN.

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EFFECTS OF TEtiPERATURE

- TEllPERATURE-DISTRIBUTION DURING CONCRETE CURING IS APPR0XIt1ATELY SYMMETRIC ABOUT MID-PLAllE OF MAT, THEREFORE, THE EFFECT OF TEMPERATURE ON THE RELATIVE DISPLACEMEllT DATA IS HEGLIGIBLE.

- EVALUATION OF LOCAL EFFECTS OF TEMPERATURE D.

EFFECTS OF SHRIl4KAGE

- SIMILAR TO TEMPERATURE, THE EFFECT OF CONCRETE SHRIllKAGE Oli THE RELATIVE DISPLACEMEliT DATA IS 11EGLIGIBLE.

- EVALUATION OF LOCAL EFFECTS OF SHRINKAGE.

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PARAMETRIC 3TUDIES A. DISPLACEMENT DATA PRECISION B. CREEP SENSITIVITY i C. TEMPERATURE AND SHRINKAGE SENSITIVITY f i 1 (

I,. RESULT EVALUATION A. EVALUATION OF ACCUMULATED RESULTS AFTER EACH TIME STEP ELEMENT FORCES AND M0MENTS S0ll PRESSURE DERIVED FP.0M REACTIONS CONCRETE AND REBAR STRESSES 4 B. EVALUATION OF RESULTS AFTER ALL TI.E STEPS M C. DISCUSSION OF RESULT COMPARIS0N WITH OBSERVED DATA AND BASEMAT CONDITION D. DISCUSSION OF IMPACT OF THE FINAL TIME STEP STRESSES ON THE STRESSES DUE TO MAT DESIGN LOADS l f' 1 l l

r i CONFIDENCE IM CALCULATED RESULTS UNCERTAINTIES IN DISPLACEMENT DATA PRECISION OF DATA u 1.bATONEPCINT= 400 FT KIPS /FT 8 (CRACKING MOMENT = i 1600) 6 DATA POINTS IN 900 REJECTED AS OBVIOUSLY INCORRECT 4 DATA POINTS EACH BLOCK CORNER UNCERTAINTIES IN MATERIAL PROPERTIES F C: AVERAGE VALUES TIME RELATIONSHIP BY TESTS E

ESTIMATED C

TIME RELATIONSHIP UNCERTAIN ~ ESTIMATE F'T : ESTIMATED TIME RELATIONSHIP UNCERTAIN ESTIMATE SHRINKAGE: ESTIMATED TIME RELATIONSHIP UNCERTAIN ESTIMATE CREEP: ESTIMATED TIME RELATIONSHIP UNCERTAIN ESTIMATE THERMAL: ESTIMATED CONFIDENCE IN - MAGNITUDE OF STRESSES - LOW STRESS PATTERN - MODERATE TIME OF CRACKING - LOW l

o ,e l SEP 1 a ggg 4 i MEETING

SUMMARY

DISTRIBUTION 1 19echEtI518(8fN8EAM2 + NRC PDR local PDR 4 NSIC PRC System LB3 Reading i Attorney, OELO GWKnighton JHWilson Project Manager JLee { NRC PARTICIPANTS .1. Knight i D. Crutchfield P. Kuo. 1 i t i j i 3 i i t i bec: Applicant & Service List 4 k l - - -.}}