Nuclear data adjustment based on the interpretation of post-irradiation experiments with the DARWIN2.3 package

Axel Rizzo (1) , Claire Vaglio-Gaudard (1) , Gilles Noguere (1) , Julie-Fiona Martin (2) , Vanessa Vallet (1) , Romain Eschbach (1)

1 DER - Département Etude des Réacteurs
2 AREVA

DARWIN2.3 is the French reference package dedicated to fuel cycle applications, computing fuel inventory as well as decay heat, neutron emissions, $\alpha$, $\beta$ and $\gamma$ spectra. The DARWIN2.3 package fuel inventory calculation was experimentally validated with Post-Irradiation Experiments (PIEs), mainly consisting in irradiated fuel pellets analysis. This paper presents a method to assimilate these integral trends for improving nuclear data. In this study, the method is applied to $^{137}$Cs/$^{238}$U concentration ratio. Results suggest an increase of the JEFF-3.1.1 $^{235}$U cumulated thermal fission yield in $^{137}$Cs by ($+$3.8 $\pm$ 2.1)%, from 6.221E-02 to 6.460E-02 $\pm$ 2.1%.

Domaines: Physique [physics]

Axel Rizzo, Claire Vaglio-Gaudard, Gilles Noguere, Julie-Fiona Martin, Vanessa Vallet, et al.. Nuclear data adjustment based on the interpretation of post-irradiation experiments with the DARWIN2.3 package. EPJ N - Nuclear Sciences & Technologies, 2018, 4, pp.47. ⟨10.1051/epjn/2018033⟩. ⟨cea-02304306⟩