Military unusable
Thorium is a perfect anti-proliferation alternative, which can't be used to produce nuclear bombs. This is also one of the reason why it was originally not chosen to develop the current nuclear technology
Consequence of the impossibility to generate Plutonium (PU-239) with the fission of Thorium : this process was neglected by the military industry.
De Gaulle (France's former president)
refused to invest in
Thorium technology for this reason.
The
second reason for
declaring Thorium military unusable is that decay products of U-233 is
an
important gamma emitter. This is a disadvantage for
someone developping a bomb which could be detected by any
commercial
Geiger-meter...