>>9230
He mentioned oxyhydrogen (a.k.a Brown's gas) as a way to melt metallic uranium. What he doesnt seem to understand is that no matter how much U-238 you implode together, you will never get a chain reaction. You can't buy enriched uranium, so even if you melted together an oil drum worth of "depleted" uranium (that is, natural U-238) and blew it up you'd just get a slightly radioactive explosive. You'd be much better off distributing the stuff throughout your explosive media, thereby creating a much more dangerous type of radological contamination.
And no, burning oxyhydrogen is not any sort of fusion. Fusion occurs when atomic nucleii get so hot and compressed that their electron fields no longer keep them separate, and they mix up their protons until they become a single new element (and throw off a huge amount of energy with the stuff that doesn't become part of the new atom). Combustion is just the bonding of to an atom or molecule, not a change to the element iself.
>>9231
It's more that they're hard enough to build that there are only a few lab grade factories with the precision to produce them, and it attracts a lot of attention if you buy one. Especially if you buy big tubs of hydrofluoric acid and a bunch of refined U-238 (or, for that matter, ore.) It's pretty obvious what you're doing at that point. That's why the "peaceful nuclear reactor"