Method of manufacturing nuclear fuel pellets

摘要

The nuclear fuel pellets of this invention comprise UO2 or (U, Gd) O2 grains and an aluminosilicate precipitation phase, the precipitation phase being a glass state or a crystalline state, the grains having an average grain diameter of about 20 mu m through about 60 mu m, the aluminosilicate precipitation phase having an composition including SiO2 of about 40 wt% through about 80 wt% and Al2O3 of the residual on average, the amount of the alumina and silica being about 10 ppm through about 500 ppm with respect to the total amount of the nuclear fuel pellets, the pellets having porosity of 5 vol% at a maximum.