The fuel, like I said, is ceramic inside zirconium fuel rods, and in the event of an accident in one of these type of reactors, Fukushima and Three Mile Island -- looking back at Three Mile Island, we didn't really see this for a while — but these zirconium claddings on these fuel rods, what happens is, when they see high pressure water, steam, in an oxidizing environment, they'll actually produce hydrogen, and that hydrogen has this explosive capability to release fission products.
Brændstoffet, som jeg sagde, er keramisk  inden i brændselsstave af zirconium, og i tilfælde af et uheld i en  reaktor af denne type, Fukushima og Three Mile Island -- ser man tilbage på Three Mile Island,  så så vi ikke dette i lang tid -- men zirconiumbeklædninger  på brændselsstavene, det der sker er, når de ser vand under højt tryk, damp, i et oxiderende miljø, vil de faktisk producere hydrogen, og den hydrogen har en eksplosiv kapabilitet til at frigive fissionsprodukter.