Abstract
With the direct coagulation casting (DCC), it may be possible to fabricate specially shaped fuel pellets to reach higher burn ups. This work aims for using the DCC process for mixed plutonium zirconium nitride annular pellets. Zirconium nitride has been proposed as inert matrix material to burn plutonium or to transmute long-lived actinides in accelerator-driven sub-critical systems or fast reactors. Plutonium zirconium nitride microspheres were fabricated by combination of sol-gel method and carbothermic reduction. Zirconium nitride annular pellets were shaped by DCC with commercially available Zirconium nitride.
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