MOX FUEL ASSEMBLY FOR LIGHT WATER REACTOR LIGHT WATER REACTOR CORE METHOD OF MANUFACTURING FUEL ASSEMBLY FOR LIGHT WATER REACTOR AND METHOD OF MANUFACTURING MOX FUEL ASSEMBLY

摘要

According to an embodiment of the present invention, a light water reactor fuel assembly comprises: a plurality of light water reactor fuel rods containing a nuclear fuel material including enriched uranium as a main component, and mutually arranged in parallel; and a plurality of burnable poison containing fuel rods extended in a longitudinal direction, containing burnable poison and a nuclear fuel material including uranium whose enrichment is lower than that of the enriched uranium of the light water reactor fuel rods as a main component, and arranged in a lattice pattern together with the light water reactor fuel rods. Each first enrichment of the enriched uranium is set in such a way that the first enrichment of the enriched uranium at an end of each operation cycle is greater than a predetermined value which can be 0.3% Δk.