Implicit finite element structural dynamic formulation for long-duration accidents in reactor piping systems

Conference · Tue Jan 01 00:00:00 EST 1985

OSTI ID:5581131

Wang, C Y

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 representing the discretized equations of motion are derived to predict the displacement increments. The calculated displacement increments are then used to correct the element nodal forces. The algorithm is fairly general, and is capable of treating large displacements and elastic-plastic materials with thermal and strain-rate effects. 7 refs., 7 figs.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5581131
• Report Number(s): CONF-850809-7; ON: DE85006842
• Resource Relation: Conference: 8. international conference on structural mechanics in reactor technology, Brussels, Belgium, 19 Aug 1985; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
22 GENERAL STUDIES OF NUCLEAR REACTORS
LMFBR TYPE REACTORS
PIPES
STEAM LINES
RESPONSE FUNCTIONS
COMPUTERIZED SIMULATION
CREEP
DYNAMIC LOADS
FINITE ELEMENT METHOD
HYDRODYNAMICS
MATHEMATICAL MODELS
PRESSURIZING
REACTOR CORE DISRUPTION
REACTOR SAFETY
STRESSES
TEMPERATURE EFFECTS
THREE-DIMENSIONAL CALCULATIONS
TRANSIENTS
ACCIDENTS
BREEDER REACTORS
EPITHERMAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
FLUID MECHANICS
FUNCTIONS
LIQUID METAL COOLED REACTORS
MECHANICAL PROPERTIES
MECHANICS
NUMERICAL SOLUTION
REACTOR ACCIDENTS
REACTORS
SAFETY
SIMULATION
210500* - Power Reactors
Breeding
220900 - Nuclear Reactor Technology- Reactor Safety