Look I'm not going to argue with you I know enough about a-bombs and nuclear energy in general, that I know the difference between fusion and fission,
fission is also the process with which nuclear power plants operate which requires no driving together or compacting of materials.
I believe you should do a little more studying of the subject.
Yeah, there's no difference in a fission reaction designed to produce heat to make steam to drive a stream turbine-generator, and one designed to create a large explosion.
http://www.wpafb.af.mil/museum/arm/arm41.htm
"A subcritical sphere of plutonium was placed in the center of a hollow sphere of high explosive (HE). Numerous detonators located on the surface of the HE were fired simultaneously to produce a powerful inward pressure on the capsule, squeezing it and increasing its density. This resulted in a supercritical condition and a nuclear explosion."