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Computing adjoint-weighted kinetics parameters in Tripoli-4 by the Iterated Fission Probability method

Abstract : The analysis of neutron kinetics relies on the knowledge of adjoint-weighted kinetics parameters, which are key to safety issues in the context of transient or accidental reactor behavior. The Iterated Fission Probability (IFP) method allows the adjoint-weighted mean generation time and delayed neutron fraction to be computed within a Monte Carlo power iteration calculation. In this work we describe the specific features of the implementation of the IFP algorithm in the reference Monte Carlo code Tripoli-4 developed at CEA. Several verification and validation tests are discussed, and the impact of nuclear data libraries, IFP cycle length and inter-cycle correlations are analyzed in detail.
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Guillaume Truchet, Pierre Leconte, Alain Santamarina, Emeric Brun, Zohia Andrea. Computing adjoint-weighted kinetics parameters in Tripoli-4 by the Iterated Fission Probability method. Annals of Nuclear Energy, Elsevier Masson, 2015, 85, pp.17-26. ⟨10.1016/j.anucene.2015.04.025⟩. ⟨cea-02387020⟩

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