Comparison of deterministic and stochastic approaches for isotopic concentration estimation on elementary fission pulse.

S. Lahaye (1) , T. D. Huynh (1) , A. Tsilanizara (1)

1 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)

Uncertainty quantification of interest outputs in nuclear fuel cycle is an important issue for nuclear safety, from nuclear facilities to long term deposits. Most of those outputs are functions of the isotopic vector density which is estimated by fuel cycle codes, such as DARWIN/PEPIN2, MENDEL, ORIGEN or FISPACT. CEA code systems DARWIN/PEPIN2 and MENDEL propagate by two different methods the uncertainty from nuclear data inputs to isotopic concentrations and decay heat. This paper shows comparisons between those two codes on a Uranium-235 thermal fission pulse. Effects of nuclear data evaluation's choice (ENDF/B-VII.1, JEFF-3.1.1 and JENDL-2011) is inspected in this paper. All results show good agreement between both codes and methods, ensuring the reliability of both approaches for a given evaluation.

10.1051/epjconf/201611109002

Domains: Nuclear Experiment [nucl-ex]; Nuclear Theory [nucl-th]

S. Lahaye, T. D. Huynh, A. Tsilanizara. Comparison of deterministic and stochastic approaches for isotopic concentration estimation on elementary fission pulse.. EPJ Web of Conferences, 2016, WONDER-2015 – 4th International Workshop On Nuclear Data Evaluation for Reactor applications, 111, pp.09002. ⟨10.1051/epjconf/201611109002⟩. ⟨cea-02491647⟩