The use of factorization techniques provides a interesting option for the simulation of the time-dependent behavior of nuclear systems with a reduced computational effort. While point kinetics neglects all spatial and spectral effects, quasi-statics and multipoint kinetics allow to produce results with a higher accuracy for transients involving relevant modifications of the neutron distribution. However, in some conditions these methods can not work efficiently. In this paper, we discuss some possible alternative formulations for the factorization process for neutron kinetics, leading to mathematical models of reduced complications that can allow an accurate simulation of transients involving spatial and spectral effects. The performance of these innovative approaches are compared to standard techniques for some test cases, showing the benefits and shortcomings of the method proposed.

Performance of Non-Conventional Factorization Approaches for Neutron Kinetics / Dulla, Sandra; Nervo, Marta. - ELETTRONICO. - (2013). (Intervento presentato al convegno International Conference on Mathematics and Computational Methods Applied to Nuclear Science a nd Engineering (M&C 2013) tenutosi a Sun Valley, ID nel May 5-9 2013).

Performance of Non-Conventional Factorization Approaches for Neutron Kinetics

DULLA, SANDRA;NERVO, MARTA
2013

Abstract

The use of factorization techniques provides a interesting option for the simulation of the time-dependent behavior of nuclear systems with a reduced computational effort. While point kinetics neglects all spatial and spectral effects, quasi-statics and multipoint kinetics allow to produce results with a higher accuracy for transients involving relevant modifications of the neutron distribution. However, in some conditions these methods can not work efficiently. In this paper, we discuss some possible alternative formulations for the factorization process for neutron kinetics, leading to mathematical models of reduced complications that can allow an accurate simulation of transients involving spatial and spectral effects. The performance of these innovative approaches are compared to standard techniques for some test cases, showing the benefits and shortcomings of the method proposed.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2507676
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