the application of different hydride materials to core components except for the driver fuel assembly is studied to achieve high core performances for fast reactor by reducing neutron energy and increasing reaction rates locally. The mixtures of absorber materials such as Gd and Zr-hydride are employed to control materials to increase reactivity worth. An optimized composition and layout of the control materials has shown the feature of burnable poison even in the fast reactor where the reaction rate of absorber nuclides is increased enough to annihilate themselves at the end of cycles. The radial blanket made of the mixture of oxide uranium and Zr-hydride is examined to decrease the required thickness as well as to achieve a non-proliferation feature in plutonium isotope compositions in discharged fuels. The shielding performance of radial shield made of Zr-hydride is evaluated to decrease the whole core diameter. Special fuel assemblies mixed with minor actinides and Zr-hydride located at the core peripherals are studied to transmute the minor actinides to fissionable materials effectively. The results has indicates that the application of the hydride materials will increase the core performances twice or triple in general.