AXIAL OPTIMIZATION OF A FUEL PIN WITH GD₂O₃ FOR VVER-1000

抄録

This research aims to increase the efficient usage of nuclear fuel. It analyses the possibility of axial optimization of a fuel pin containing a Gd₂O₃ burnable absorber. The work deals with the effect of shortening (one-sided and double-sided) the fuel pin with Gd₂O₃ burnable absorber. Analysis of the effect on the power distribution was presented. Furthermore, it investigates the effect on stability during xenon oscillations and selected reactivity coefficients. The study performed a set of variations with different axial shortening of the Gd₂O₃ fuel and replacement of the fuel parts without the burnout absorber. For the evaluation, a special reference fuel loading pattern was designed and calculated by MOBY-DICK diffusion macro-code.