Hopefully my posting fits here in this energy thread
I want to lecture why nuclear civilian usage is possible but military grade nuclear fission chain reaction is not possible and against the law of physics:
Every material is made of crystals. A material has many chrystal layers in its core. Also radioactive materials.
The fake story of nuclear chain reaction needs a fission material made of 100% single crystal to work properly. Any material without these specifications will simply not got into a chain reaction.
this is a example picture:
No radioactive material can be grown into a single crystal because it is too unstable for the process. the heat signature is not controlable. Because of the nuclear heat reaction.
Thats the reason why Nuclear warheads are a mere fantasy and a hoax.