FUEL ASSEMBLY FOR NUCLEAR REACTOR

摘要

A nuclear reactor fuel assembly in which the majority of fuel pellets in the fuel assembly have a burnable poison such as gadolinia (Gd2O3) dispersed in them at a low concentration so that the burnable poison burns up in the initial stage after on-load refuelling. Dispersion of the burnable poison at a low concentration in the fuel pellets permits control of the rate of power increase of the loaded fuel assembly and other fuel assemblies adjacent to it, and permits an on-load refuelling operation.