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Article Dans Une Revue Annals of Nuclear Energy Année : 2018

Verification of iterative matrix solutions for multipoint kinetics equations

Résumé

Multipoint kinetic equation systems have been solved numerically using matrix algebra software and 1st to 4th order implicit schemes based on single-step matrix propagators. These matrix schemes have been validated successfully on demanding point kinetics benchmarks with various prescribed reactivity insertions. Verification tests have also been performed on a simple 3-region fast reactor core model with asymmetric step or ramp reactivity insertions and cross-checked with the multipoint kinetics SACRE code developed at INL and based on existing and validated stiff ODE solver packages. Accurate results can be obtained at a limited time expense. The reason for intriguing results obtained in some transients has been elucidated and linked to the multipoint matrix coefficient interpolation method during the transient.
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Dates et versions

cea-02339617 , version 1 (04-11-2019)

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  • HAL Id : cea-02339617 , version 1

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J. Tommasi, G. Palmiotti. Verification of iterative matrix solutions for multipoint kinetics equations. Annals of Nuclear Energy, 2018, 124, pp.357-371. ⟨cea-02339617⟩
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