I tried to post this earlier but it was lost in cyberspace.
Donuel, I am truly sorry about your sister. I do however question the source and accuracy of your postings.
The situation in Japan is truly awful and what may be to come perhaps worse. I claim no expertise in nuclear physics but rely on simpler dumbed down theory that I can comprehend.
The most prevalent fissile isotope of uranium is U-235 which is found in natural uranium at a concentration of between .7 and .8 of 1%. The much larger body of natural uranium is U-238 which is not fissile and is actually an impediment to a chain reaction. Fuel for light water reactors is enriched to a concentration of about 5% U-235.
U-235 of weapons grade must usually be above 85%. I believe that nuclear explosions, including the Hiroshima bomb, were created at about 80% U-235 by using a pressure cone containing neutron reflectors. At the concentration level of power plant fuel an atomic blast is not possible. However fission is attained by reaching a critical mass in a reactor core but the difficulty is as much in keeping the reaction going as regulating it. The byproducts of fission , not the explosive potential is where the danger of human disaster lies! Explosions of a chemical nature can be massive distributing radioactive poison far and wide and that is the real concern.   
Donuel you state "Go ahead and believe Sen Alexander or Bret Baier or even Glen Beck if you think it is the right point of view or the right thing to do."
I must admit in my ignorance that I have never heard of any of them. Who are they?
                                                                            Sandy