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Research and development of RBWR for high efficiency transuranium elements burner, 3; First-principles calculation of interaction between solute atoms and irradiation defects in Zr

Itakura, Mitsuhiro  ; Okita, Taira*

Time to hydride precipitation in Zircalloy fuel cladding determines the lifetime of the fuel cladding of nuclear reactors. For the design of a new reactor with increased irradiation to transmute TRU elements and reduce waste, the effect of irradiation on the hydride formation must be evaluated. We carried out ab-initio calculations of diffusion and interaction properties of lattice defects and solute atoms to deduce the fundamental parameters for the modeling of hydride formation. The results are indispensable for the design of the new reactor.

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