Coupling of fission event generator FIFRELIN to radiation transport code PHITS

Ogawa, Tatsuhiko   ; Litaize, O.*; Mancusi, D.*; Chebboubi, A.*; Serot, O.*

The Monte-Carlo code FIFRELIN was originally developed for the simulation of first chance fissions of fissile nuclei. In this study, its interfaces to codes handling the post-reaction processes were developed. The energy spectra of neutrons, electrons and photons from fission reactions are output in a format compatible with PHITS, a general-purpose particle transport code. By using this functionality, one can simulate the transport and reactions of particles based on the cross section data and reaction models of PHITS, and the source spectra calculated by FIFRELIN. The other interface developed in this study outputs nuclide yield output in a format compatible with DCHAIN-PHITS, a burn-up calculation code. This interface is necessary to consider the build-up, which depends on the time structure of the incoming neutron beam as well as the decay during the cooling period.