ML19337B440

Viewgraphs of, Structural Modeling Refinement & Development of Improved Analytical Procedures.

ML19337B440
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Site:	Columbia
Issue date:	09/18/1980
From:	BURNS & ROE CO.
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ML19337B432	List: ML19337B433 ML19337B435 ML19337B436 ML19337B439 ML19337B440
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NUDOCS 8010020411
Download: ML19337B440 (33)

Text

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STRUCTURAL MODELING REFINEME'lT M

DEVELOPMENT OF IMPROVED ANALYTICAL CROCEDURES (0BJECTIVE #2) l l

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STRUCTURAL MODELING/ ANALYTICAL PROCEDURES

SUMMARY

AXISYMEETRIC WATER-STRUCTURE-SOIL COUPLED SYSTEM ASSUMED.

o REASONABLE ASSUMPTION SINCE MAJOR STRUCTURAL COMPONENTS ARE AXISYMMETRIC, ARBITRARY (NON-AXISYMMETRIC) LOADING HANDLED THROUGH DECOMPOSITION TO FOURIER HARMONICS.

FINITE ELEMENT METHOD OF ANALYSIS USED. FINITE ELEMENTS UTILIZED:

- AXI-SYMMETRIC SHELL ELEMENTS AXI-SYMMETRIC SOLID ELEMENTS THREE-DIMENSIONAL FLUID ELEMENTS SOLUTION OBTAINED IN FREQUENCY DOMAIN o MORE EFFICIENT / ECONOMICAL FOR THIS TYPE OF PROBLEM. l l

A MODIFIED VERSION OF ASHD-2 COMPUTER CODE WAS USED. i l

LINEAR PROPERTIES ASSUMED FOR ALL THREE SYSTEM COMP 0ENTS: j WATER (INCOMPRESSIBLE, INVISCID), STRUCTURE AND S0ll.

o ASSUMPTION VALIDATED BY CAORSO/TOKAI-2 TEST RESULTS.

STRUCTURAL DAMPING CONSIDERED HYSTERETIC.

o ADVANTAGEOUS FOR USE IN SYSTEMS WITH DIFFERENT ELEMENT DAMPING VALUES; FREQUENCY INDEPENDENT.

REFINED MODELING OF STRUCTURAL COMPONENTS CONSTITUTING THE SUPPRESSION CHAMBER NtiiED BOUNDARY WAS IMPLEMENTED USING SOLID FINITE ELEMENTS.

IMPROVED ANALYTICAL PROCEDURES ADEQUATE FOR SUCH APPLICATIONS WERE DEVELOPED.

RESULTS OBTAINED WERE DIFFERENT FROM THOSE OBTAINED  ;

ANALYZING THE ORIGINAL MODEL.

RESULTS OBTAINED COMPARE ADEQUATELY WITH MEASURED BUILDING RESPONSES AT CA0RSO.

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CONCLUSIONS-AN IMPROVED SRV DISCHARGE LOAD DEFINITION WAS DEVELOPED USING CAORSO IN-PLANT SRV TEST RESULTS. THIS DEFINITION (AS WELL AS CAORSO DATA) IS CONFIRMED BY TOKAI-2 IN-PLANT SRV TESTS. STRUCTURAL MODELING AND ANALYTICAL PROCEDURES ADEQUATE FOR CALCULATING RESPONSES OF A MARK II CONTAINMENT STRUCTURE SUBJECTED TO SRV DISCHARGE LOADS HAVE BEEN DEVELOPED. WHEN THE IMPROVED LOAD IS APPLIED TO THE CA0RSO CONTAINMENT THE CALCULATED RESPONSES ARE COMPARABLE TO TEST RESULTS. WHEN THE IMPROVED LOAD IS APPLIED TO WNP-2 ITS STEEL CONTAINMENT PREDICTED RESPONSE IS COMPARABLE TO TOKAI-2 STEEL CONTAINMENT MEASURED RESPONSE. FINITE RESPONSES TO SRV DISCHARGE LOADS WERE RECORDED (AND ARE PREDICTED) IN THE WETWELL AREk ATTENUATED RESPONSES IN THE DRYWELL AREA AND NEGLIGIBLE RESPONSES OUTSIDE THE PRIMARY CONTAINMENT. I}}