The Group of Energy Materials(GEM)in IMP is engaged in the irradiation response of materials candidate to advanced nuclear energy systems(Gen IV,fusion reactors).The major progress of research in our group in 2016 is in the irradiation hardening/embrittlement of oxide-dispersion-strengthened(ODS)ferritic steels and Vanadium alloys,and in the mechanisms underlying damage production in silicon carbide(SiC)fibers.A brief description is given as follows.1.Effect of the oxide nano particles on the irradiation hardening of ODS ferritic steels The influence of oxide nano particles on the irradiation resistance of ODS ferritic steels is a crucial issue for the upgrade of ODS steels.