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Light-water Reactor Fuel


Nuclear Fuel Industries, Ltd. is the only company able to fabricate two types of light-water reactor fuel in Japan.


“What is Light Water Reactor?”

The light water reactor is a nuclear power reactor initially developed in the USA. The power reactor is filled with normal water. This water cools the power reactor and moderates the neutron energy (slows the travel speed) to help facilitate nuclear fission. Mainly, there are two types of reactors: the pressurized water type (PWR) and the boiling water type (BWR).

Fuel assembly for pressurized water reactor (PWR) Fuel assembly for boiling water reactor (BWR)
Fuel assembly for pressurized water reactor (PWR)
Fuel assembly for boiling water reactor (BWR)

Fabrication of Light-Water Reactor Fuel

1. Uranium powder 2. Molding 3. Green pellet 4. Sintering
5. Sintered pellet 6. Assembling of a fuel rod 7. Assembling of an assembly 8. Fuel assembly
Fabrication of Light-Water Reactor Fuel

Basic Structure of PWR Fuel Assembly

Basic Structure of PWR Fuel Assembly

Basic Structure of BWR Fuel Assembly

Basic Structure of BWR Fuel Assembly
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