Originally posted by Peruvianmonk
Can you develop a crude nuclear device out of smaller amounts of Uranium such as N Korea are reported to have?
Well yes and no..... That would really depend on what sort of weapons grade material they actually have.... Of course the (fabled?) suitcase bombs I
think will be using something like 10 or 15 KG's of some sort of weapons grade stuff, what it would be I don't know, not uranium though.
Every different type of fissionable material (ie your Uranium, your Plutonium, there are others
look
here ) all have a minimum critical mass, so if you had a sphere of a particular material and the mass of that sphere was above the minimum for
that material it would go from sub critical (stable, not doing much) to super critical (doing interesting things, such as get very very hot, good for
power stations, or explode!!! Good for nukes!)...
So lets stick with Uranium 235, you need at the very least 52 kg of the stuff, and then you have to basically get that mass to go supercritical way
when and where you want it to - which can actually be quite simple in a gun bomb design, or very very complicated as in the implosion method).
If you make a weapon with any less than the critical mass then you would not have a nuclear explosion... You could of course use that weapons grade
material for a dirty bomb, but that's not a great idea, it's clearly very difficult to get in large quantities and there are many many other sources
of radiological material just hanging around that are easy enough to get hold of.
Nope if Lil Kimmey really does only have 30 - 40 KG's he's gonna want to be laying his hands on a whole lot more... Or just try to obtain the ready
build bombs from somewhere else.