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Report No.

Fuel design and fabrication; Pellet-type fuel

Kato, Masato   

The fuel design and fabrication of pellet-type fuels including oxides, nitrides, and carbides were reviewed. Temperature analysis, fuel properties, and irradiation behaviors were described in the section regarding fuel design. In the fuel design, the temperature profile in the radial direction of a pellet is analyzed for fuel performance evaluation, and the maximum temperature of the fuel is limited to below the melting temperature of fuels in the fuel design to prevent fuel failure. Therefore it is important to know physical and chemical properties of the fuel pellets. Understanding the fission product behavior is also important in evaluating burning fuels, because pellet and cladding interaction causes. In addition, general procedures to generate each fuel were summarized in the fuel fabrication section. Pellets of UO$$_{2}$$ and MOX are stable in air atmosphere, but nitrides and carbides are handled in a glove box filled with inert gas to prevent ignition by the reaction with oxygen.



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