This is going to be awesome! Unless of course the terrorists get hold of them and dismantle, use the nuclear energy, and nuke a city. :eek: This idea is horrible! Run for your lives! We are all going to die!!!!!!!
The material does not need to be uranium or plutonium. There are countless radioactive isotopes that release energy that can be captured in such a design.
We already sell tons of such materials every year. Terrorists can get all those they want, and they don't make much difference. E.g., Americium is in common home smoke detectors. And medical devices regularly use radioactive materials.
We rely on countless radioactive isotopes in civilian, commercial solutions that are not regulated for sale by the US Department of Energy.