| abstract |
[PROBLEMS] To improve the heat capacity and FP confinement function of a fuel assembly for a light water reactor. A fuel particle (13) comprising a substantially spherical fuel core (20) containing at least one of uranium and plutonium as a fissile material and covered with a plurality of layers (21-23) containing graphite, and graphite powder. Is loaded with a fuel assembly composed of a plurality of long fuel rods 2 that are regularly bundled. |