more dangerous than uranium. is that right in the. mox is a mixed oxide. it s uranium, plutonium, oxide mixture. is that not normal? it s a different type of fuel. actually, we in light water reactors some can use mixed om side fuels, as well. they re both very effective fuels. it is different. and i believe that s correct that in reactor 3 is where the mox is being used. so what happens as we talk about plutonium? what could happen? what is worst case scenario at reactor number 3? the main objective is to contain the fuel in the vessel and then in the containment after that. if that s contained, there s no more danger than regular uranium dioxide. containing meaning the steel casing or the water? keep it contained within the pressure vessel itself. it s a very thick steel vessel.