Uranium zirconium hydride

Uranium zirconium hydride (UZrH), a combination of uranium hydride and zirconium(II) hydride, is used as the fuel in TRIGA reactors. UZrH fuel is used in most research reactors at universities and has a large, prompt negative fuel temperature coefficient of reactivity, meaning that as the temperature of the core increases, the reactivity rapidly decreases.[1]

Franco-Belge de Fabrication du Combustible, in Romans-sur-Isère, France, is the only manufacturer of this fuel.[2]


  1. ^ "TRIGA Fuels".
  2. ^ "Plant upgrades ensure continued TRIGA fuel supply : Uranium & Fuel - World Nuclear News".

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