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Eulerian method for large-displacement fluid-structure interaction in reactor containments

Description: An Eulerian method for analyzing large-displacement fluid-structure interaction in reactor containments is presented. The emphasis is on the development of a generalized hydrodynamic scheme to treat the irregular cells created by the movement of the structure with respect to the fixed Eulerian coordinates. A relaxation equation is derived from the boundary condition at the fluid-structure interface for the solution of the pressure at the interface. By combining this with the Poisson equation a … more
Date: January 1, 1977
Creator: Chang, Y. W. & Wang, C. Y.
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Partner: UNT Libraries Government Documents Department
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Eulerian algorithm for analyzing fluid-structure interaction in the fast reactor containment

Description: The Eulerian algorithm described is capable of analyzing two-dimensionally the fluid-structure interaction in a typical LMFBR containment consisting of various structure components. The algorithm has several special features. First, it employs the Eulerian coordinates in the formulation and enables the technique to be applicable to excursions involving large material distortions. Second, it provides rigorous hydrodynamic analyses at the fluid-structure interface and at the geometrical discontin… more
Date: January 1, 1977
Creator: Wang, C. Y.; Chang, Y. W. & Fistedis, S. H.
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Partner: UNT Libraries Government Documents Department
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Some safety considerations in the selection of redans for pool-type LMR plants

Description: Three basic safety issues in the selection of the redan design for a pool type liquid metal fast breeder reactor plant are examined. The first area examined is the effect of the redan selection on the integrity of the primary system pressure boundary in normal and offset conditions. The second area is on the consequence of the hypothetical core disruptive accident. The third area is on the consequence of the loss of heat sink accident. Some general discussion and numerical results are presented… more
Date: January 1, 1985
Creator: Pan, Y. C.; Pedersen, D. R. & Wang, C. Y.
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Partner: UNT Libraries Government Documents Department
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Analysis of fluid-structure interaction and structural response of Chernobyl-4 reactor

Description: On April 26, 1986, an accident occurred at the Chernobyl-4 Nuclear Power Plant in the Soviet Union. A post accident meeting was held in Vienna during the week of August 25, 1986. In mid-July 1986, the DOE formed a team to analyze the accident, including experts from the national laboratories such as Argonne National Laboratory, Brookhaven National Laboratory, Oak Ridge National Laboratory, and Pacific Northwest Laboratory. The goal was to assess the information's plausibility, provided analytic… more
Date: January 1, 1989
Creator: Wang, C. Y.; Pizzica, P. A.; Gvildys, J. & Spencer, B. W.
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Partner: UNT Libraries Government Documents Department
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Implicit finite element structural dynamic formulation for long-duration accidents in reactor piping systems

Description: This taper describes an implicit three-dimensional finite-element formulation for the structural analysis of reactor piping system. The numerical algorithm considers hoop, flexural, axial, and torsion modes of the piping structures. It is unconditionally stable and can be used for calculation of piping response under static or long duration dynamic loads. The method uses a predictor-corrector, successive iterative scheme which satisfies the equilibrium equations. A set of stiffness equations re… more
Date: January 1, 1985
Creator: Wang, C. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent development of three-dimensional piping code SHAPS

Description: This paper describes the recent development of the three-dimensional, structural, and hydrodynamic analysis piping code SHAPS. Several new features have been incorporated into the program, including (1) an elbow hydrodynamic model for analyzing the effect of global motion on the pressure-wave propagation, (2) a component hydrodynamic model for treating fluid motion in the vicinity of rigid obstacles and baffle plates, (3) the addition of the implicit time integration scheme in the structural-dy… more
Date: January 1, 1985
Creator: Wang, C. Y. & Zeuch, W. R.
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Partner: UNT Libraries Government Documents Department
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Seismic base isolation: Elastomer characterization, bearing modeling and system response

Description: This paper discusses several major aspects of seismic base isolation systems that employ laminated elastomer bearings. Elastomer constitutive models currently being used to represent the nonlinear elastic and hysteretic behavior are discussed. Some aspects of mechanical characterization testing of elastomers is presented along with representative tests results. The development of a finite element based mesh generator for laminated elastomer bearings is presented. Recent advances in the simulati… more
Date: January 1, 1991
Creator: Kulak, R. F.; Wang, C. Y. & Hughes, T. H.
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Partner: UNT Libraries Government Documents Department
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Analysis of pressure wave transients and seismic response in LMFBR piping systems using the SHAPS code

Description: This paper presents some of the current capabilities of the three-dimensional piping code SHAPS and demonstrates their usefulness in handling analyses encountered in typical LMFBR studies. Several examples demonstrate the utility of the SHAPS code for problems involving fluid-structure interactions and seismic-related events occurring in three-dimensional piping networks. Results of two studies of pressure wave propagation demonstrate the dynamic coupling of pipes and elbows producing global mo… more
Date: January 1, 1985
Creator: Zeuch, W. R. & Wang, C. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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System response analyses of base-isolated structures to earthquake ground motions

Description: Seismic isolation is one of the most significant earthquake engineering developments in recent years. This paper describes system response analyses of base-isolated structures to earthquake ground motions. Emphasis is placed on the adaptation of a nonlinear constitutive model for the elastomeric isolation bearing together with the treatment of foundation embedment for the soil-structure- interaction analysis. The constitutive model requires six input parameters derived from bearing experimental… more
Date: January 1, 1991
Creator: Wang, C. Y.; Tang, Y. (Argonne National Lab., IL (USA)) & Marchertas, A. H. (Northern Illinois Univ., De Kalb, IL (USA))
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Partner: UNT Libraries Government Documents Department
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Seismic response analyses of base isolated structures with high damping elastomeric bearings

Description: Seismic response analysis of base-isolated structures with high damping elastomeric bearings is described. Emphasis is placed on the adaptation of a nonlinear constitutive model for the isolation bearing together with the treatment of foundation embedment for the soil-structure-interaction analysis. The constitutive model requires six input parameters derived from bearing experimental data under sinusoidal loading. The characteristic behavior of bearing, such as the variation of shear modulus a… more
Date: January 1, 1991
Creator: Wang, C. Y.; Tang, Y.; Chang, Y. W.; Seidensticker, R. W. (Argonne National Lab., IL (USA)) & Marchertas, A. H. (Northern Illinois Univ., De Kalb, IL (USA))
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Partner: UNT Libraries Government Documents Department
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Recent developments of the arbitrary Lagrangian-Eulerian containment code ALICE-II. [LMFBR]

Description: The ANL arbitrary Lagrangian Eulerian containment code ALICE was developed for use in fast reactor containment studies and is particularly suited for problems involving complex fluid-structure interactions. Many improvements have been made which has resulted in a second version of the code, ALICE-II. A selection of some important improvements are given in this paper. To realistically analyze the above-core hydrodynamics containing a movable upper internal structure (UIS), a 3-D pipe element has… more
Date: January 1, 1983
Creator: Wang, C. Y. & Zeuch, W. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Multi-dimensional arbitrary Lagrangian-Eulerian method for dynamic fluid-structure interaction. [LMFBR]

Description: This paper describes an arbitrary Lagrangian-Eulerian method for analyzing fluid-structure interactions in fast-reactor containment with complex internal structures. The fluid transient can be calculated either implicitly or explicitly, using a finite-difference mesh with vertices that may be moved with the fluid (Lagrangian), held fixed (Eulerian), or moved in any other prescribed manner (hybrid Lagrangian Eulerian). The structural response is computed explicitly by two nonlinear, elastic-plas… more
Date: January 1, 1982
Creator: Wang, C. Y. & Zeuch, W. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Eulerian formulation of fluid-structure interaction in reactor containment system

Description: This paper is concerned with an Eulerian formulation for a fluid-structure interface developed for the nonlinear fluid-structure interaction analysis encountered in the primary containment and piping components of nuclear reactors. The Eulerian finite difference methodology is chosen because of its decisive abilities in: (1) investigating material motion with large distortions, (2) treating fluid flow around internal structures having a geometrical discontinuity, (3) handling wave transients in… more
Date: January 1, 1979
Creator: Wang, C. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Seismic analysis of a large pool-type LMR (liquid metal reactor)

Description: This paper describes the seismic study of a 450-MWe liquid metal reactor (LMR) under 0.3-g SSE ground excitation. Two calculations were performed using the new design configuration. They deal with the seismic response of the reactor vessel, the guard vessel and support skirt, respectively. In both calculations, the stress and displacement fields at important locations of those components are investigated. Assessments are also made on the elastic and inelastic structural capabilities for other b… more
Date: January 1, 1989
Creator: Wang, C. Y. & Gvildys, J.
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Partner: UNT Libraries Government Documents Department
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HCDA behavior within the primary containment of a large pool-type LMFBR

Description: This paper discusses, specifically, the primary containment response of a large pool-type reactor under HCDA conditions. A large-diameter, thin-walled, pool-type reactor may have some inherent safety advantages in terms of energy accommodation during HCDA loads. The purpose of this study was to predict the containment response from the energetic excursion and to determine the impact loading on the reactor deck for a more detailed analysis. The essential features of the primary system which were… more
Date: January 1, 1983
Creator: Zeuch, W. R.; Wang, C. Y. & Seidensticker, R. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Theory and application of a three-dimensional code SHAPS to complex piping systems. [LMFBR]

Description: This paper describes the theory and application of a three-dimensional computer code SHAPS to the complex piping systems. The code utilizes a two-dimensional implicit Eulerian method for the hydrodynamic analysis together with a three-dimensional elastic-plastic finite-element program for the structural calculation. A three-dimensional pipe element with eight degrees of freedom is employed to account for the hoop, flexural, axial, and the torsional mode of the piping system. In the SHAPS analys… more
Date: January 1, 1983
Creator: Wang, C. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Response of a pool-type LMR (liquid metal reactor) to seismic loads

Description: This paper describes the seismic analysis of a 450-MWe pool-type liquid metal reactor (LMR) under 0.3 g SSE ground excitations. It also assess the ultimate inelastic structural capabilities for other beyond-design-basis seismic events. Calculation is focused on a new design configuration where the vessel thickness is reduced considerably compared to the previous design (Ma and Gvildys, 1987). In the analysis, the stress and displacement fields at important locations of the reactor vessel, guard… more
Date: January 1, 1989
Creator: Wang, C. Y. & Gvildys, J. (Argonne National Lab., IL (USA))
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Partner: UNT Libraries Government Documents Department
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Quantitative analysis of the effect of complex internals on LMFBR containment during energetic accidents

Description: This paper discusses the effects of complex internals on the containment response of large LMFBRs during energetic accidents. Results of a series of analyses with the ALICE-II code demonstrate quantitative structural and hydrodynamic effects from parametric variation of reactor internal designs. Effects of various upper internal structure treatments, structural stiffness of the upper internal structure and core support structure, and the location and dimensions of internal components are examin… more
Date: January 1, 1985
Creator: Zeuch, W. R. & Wang, C. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Evaluation of Lagrangian, Eulerian, and arbitrary Lagrangian-Eulerian methods for fluid-structure interaction problems in HCDA analysis

Description: The analysis of fluid-structure interaction involves the calculation of both fluid transient and structure dynamics. In the structural analysis, Lagrangian meshes have been used exclusively, whereas for the fluid transient, Lagrangian, Eulerian, and arbitrary Lagrangian-Eulerian (quasi-Eulerian) meshes have been used. This paper performs an evaluation on these three types of meshes. The emphasis is placed on the applicability of the method in analyzing fluid-structure interaction problems in HC… more
Date: January 1, 1979
Creator: Chang, Y. W.; Chu, H. Y.; Gvildys, J. & Wang, C. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SHAPS-2: a three-dimensional computer program for linear/non-linear, static/dynamic analyses of piping systems. [LMFBR]

Description: A three-dimensional computer program for linear/non-linear, static/dynamic analyses of reactor-piping systems under various accident loads is described. In the analysis, the hydrodynamic calculation can be performed in the implicit or semi-implicit manner. The structure response can be calculated using either a purely explicit or implicit time-integration scheme. Coupling between the fluid and structure is achieved by utilizing either the implicit-explicit or implicit-implicit link. Thus, a wid… more
Date: January 1, 1985
Creator: Wang, C. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis of HCDA loads and containment response of a large loop-type LMFBR

Description: As part of a comprehensive safety study, analyses are presented on the hydrodynamic loads and containment response of a large loop-type LMFBR subjected to an HCDA of a 1000 MJ energy release. The reference reactor consists of a primary vessel, a head cover, and various complex internals such as the upper internal structure (UIS), the core-support structure (CSS), radial shield, shield baffles, and deflector plate. Three calculations are performed with the ANL hybrid Lagrangian-Eulerian containm… more
Date: January 1, 1983
Creator: Wang, C. Y.; Zeuch, W. R.; Chang, Y. W. & Fistedis, S. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Comparison of ALICE-II code predictions with SRI complex vessel experiments

Description: Several complex vessel experiments on 1/20-scale models of the Clinch River Breeder Reactor Project (CRBR) were performed by SRI International to help evaluate the containment structural integrity subjected to HCDAs. Among these experiments SM-3 is a simple model which consists of a radial shield, core barrel, upper internal structure (UIS), and a primary vessel. Tests SM-4 and SM-5 are more complex models than SM-3. This paper presents comparisons of the ALICE-II code (Arbitrary Lagrangian Imp… more
Date: January 1, 1983
Creator: Ku, J. L.; Wang, C. Y. & Zeuch, W. R.
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Partner: UNT Libraries Government Documents Department
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Three-dimensional method for integrated transient analysis of reactor-piping systems

Description: A three-dimensional method for integrated hydrodynamic, structural, and thermal analyses of reactor-piping systems is presented. The hydrodynamics are analyzed in a reference frame fixed to the piping and are treated with a two-dimensional Eulerian finite-difference technique. The structural responses are calculated with a three-dimensional co-rotational finite-element methodology. Interaction between fluid and structure is accounted for by iteratively enforcing the interface boundary condition… more
Date: January 1, 1981
Creator: Wang, C. Y.
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Partner: UNT Libraries Government Documents Department
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Analysis of piping response to thermal and operational transients

Description: The reactor piping system is an extremely complex three-dimensional structure. Maintaining its structural integrity is essential to the safe operation of the reactor and the steam-supply system. In the safety analysis, various transient loads can be imposed on the piping which may cause plastic deformation and possible damage to the system, including those generated from hydrodynamic wave propagations, thermal and operational transients, as well as the seismic events. At Argonne National Labora… more
Date: January 1, 1987
Creator: Wang, C. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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