ML20045C839

Forwards Proprietary Markups of SSAR App 3C,reflecting Finel Code & App 19F,mainly Incorporates Liner Tearing.Encl Withheld

ML20045C839
Person / Time
Site:	05200001
Issue date:	06/14/1993
From:	Fox J GENERAL ELECTRIC CO.
To:	Poslusny C Office of Nuclear Reactor Regulation
Shared Package
ML19303F642	List: ML20045C839
References
NUDOCS 9306240460
Download: ML20045C839 (6)

Text

n GENucicar Energy Genera Electnc Company 175 Curtre Amae. San Jose, CA 95125 June 14,1993 Docket No. STN 52-001 Chet Poslusny, Senior Project Manager Standardization Project Directorate Associate Directorate for Advanced Reactors and License Renewal Office of the Nuclear Reactor Regulation

Subject:

Submittal Supporting Accelerated ABWR Schedule - Appendices 3C and 19F

Dear Chet:

Enclosed are markups of SSAR Appendix 3C reflecting the FINEL Code and Appendix 19F which mainly incorporates liner tearing.

Please provide a copy of this transmittal to Hans Ashar.

Sincere,

X J ek Fox Advanced Reactor Programs cc: Norman Fletcher (DOE)

Ai-Shen Liu (GE) i300C2 got0

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APPENDIX 3C TABLE OF CONTENTS Section 11tle Ease 3C COMPUTER PROGRAMS USEDINTHE l

DESIGN AND ANALYSIS OF SEISMIC CATEGORYI STRUCTURES 3C.1 INTRODUCTION 3C.1-1 3C.2 STATIC AND DYNAMIC STRUC1 URAL ANALYSIS SYS'IEMS (STARDYNE) 3C.21 3C.2.1 Description 3C.2-1 3C.2.2 Validation 3C.21 3C.23 Extent of Application 3C.21 3CJ CONCRETE ELEMENT CR4CKING ANALYSIS PROGRAM (CECAPI 3C3-1 I

3C3.1 Description 3C31 3C3.2 Validation 3C3-1 3C33 Extent of Application 3C3-1 3C.4 FIpiTE EliiMeuT TRoGRAM FOR CRActlOg Adotyst.s ( FIN et) j 3CA, \\

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23A6101 G Standard Plant REV A 3Q.1 INTRODUCTION The following Seismic Category I Structures 4

and their foundations of the nuclear island are analyzed and/or designed using the computer programs described in this appendix.

(1) Reactor Building (2) Concrete Containment Structure (3)bnkYok3Mcky&

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Amendment 1 3C-1 I

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23A6100AE Rimederd Plant REV.A 3C.3 ' CONCRETE ELEMENT CRACKING ANALYSIS PROGRAM (CECAP) 3C.3.1 Description CECAP computes stresses in a concrete element under thermal and/or nonthermal (real) loads, considering effects of concrete' cracking. _The element represents a section of a concrete shell or slab, and may include two layers of reinforcing, transverse reinforcing, prestressing tendons, and a liner plate.

The program outputs stresses and strains along the element in the concrete, reinforcement, and liner plate, and resultant forces and moments for the composite concrete element.

CECAP assumes linear stress-strain relationships for steel and for concrete in compression. ' Concrete is assumed to have no tensile strength. The solution is an iterative process, whereby tensile stresses found initially in concrete are relieved (by cracking) and redistributed in the element. The equilibrium of nonthermal loads is preserved. For thermal effects, the element is assumed free to expand

inplane, but is fixed against rotation. The capability for' expansion and cracking generally results in a reduction in thermal forces and moments from the initial condition.

3C.3.2 Validation 1

CECAP is written and maintained by Bechtel i

Power. Corporation (BPC) of San Francisco, California. Program validation documentation is 1

available at BPC in San Francisco.-

3C.3.3 Extent ofApplication This' progra'm is used for the analysis of the reactor building and containment structure.

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3C.4 FINITE ELEMENT PROGRAH FOR CRACKING ANALYSIS (FINEL)

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'C.4.1 Description 3

FINEL is a proprietary computer program of Bechtel Power Corporation, San Francisco, California. The FINEL program performs a static analysis of stresses and strains in plane and axisymmetric structures by the finite element method.

The program performs the non-linear static analysis utilizing a stepwise linear iteration solution technique. Within each solution cycle, status of all elements is determined and their stiffness adjusted by the program prior to the next iteration cycle. The Von Mises yield criterion is used to determino the status of all ductile materials and brittle materials which are in compression. A ductile material is assumed to yield in all directions when the yield criterion is exceeded. A brittle material is assumed to be cracked in the direction in which the maximum principal stress exceeds the specified tensile stress. The modulus of elasticity for each material is adjusted for the next

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solution cycle to conform to the secant modulus corresponding to the calculated strain in the element following the bilinear stress strain relationship specified. The numerical algorithm assumes that the state of stress which exists when the converged solution is achieved is independent of the stress history of the loading.

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3C.4.2 Validation The FINEL code has been extensively used in the past to design reinforced concrete containment structures and to predict the strains and deflections during their structural integrity tests (SIT).

The correlation between the predicted and observed deflections and strains during such tests has been very satisfactory.

FINEL code predictions have been on the conservative side.

The FINEL code was validated by comparing results based on FINEL with results based on classical solutions. and/or experimental results existing in literature. A further confirmation of its validity is provided by comparison of predicted strains and deformations based on FINEL with the experimental results obtained during SIT on various Bechtel designed containments.

3C.4.3 Extent of Application This program is used for the static load analysis of the reactor building and containment to determine stresses and strains in the various structural elements and resultant forces and moments at selected sections; and is used to evaluate the ultimate strength of the containment.

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