Assimilation of integral experiments on high-energy nuclear parameters

Current assimilation of integral experiments often consists in adjusting multi-group cross sections with feedbacks from critical reference benchmarks. In order to maintain the constraints coming nuclear models, we present here a method achieve experiment on parameters, which data are evaluated. This method, based Bayesian inference, uses continuous energy reactivity sensitivities throughout all types (cross section, angular distribution, fission multiplicity and spectrum). improvement was made possible by coupling stochastic transport code evaluation code. The study test case – Jezebel ICSBEP benchmark plutonium-239 toy shows that distributions have non-negligible impact process results.