Neutronics Experimental Validation of the Jules Horowitz Reactor Fuel by Interpretation of the VALMONT Experimental Program—Transposition of the Uncertainties on the Reactivity of JHR With JEF2.2 and JEFF3.1.1

The new European material testing Jules Horowitz Reactor (JHR), currently under construction in Cadarache center (CEA France), will use LEU (20% enrichment in
$^{235}{\rm U}$
) fuels (
${\rm U}_{3}{\rm Si}_{2}$
for the start up and UMoAl in the future) which are quite different from the industrial oxide fuel, for which an extensive neutronics experimental validation database has been established.