1. 
   Aqueous homogeneous reactor
   Aqueous homogeneous reactors (AHR) are a type of nuclear reactor in which soluble nuclear salts (usually uranium sulfate or uranium nitrate) are dissolved in water. The fuel is mixed with the coolant and the moderator, thus the name "homogeneous" (`of the same physical state`) The water can be eith...
   Found op http://en.wikipedia.org/wiki/Aqueous_homogeneous_reactor
   
   

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