11. For example, consider an infinite sheet of fissionable material. 12. Inert practice weapons and surveillance weapons without fissionable material were also transported. 13. Thorium is a fissionable material used in thorium-based nuclear power. 14. *Well to give my best answers 1 ) Mostly fissionable material. 15. :Look at Fissile material for the difference between fissile and fissionable . 16. They have more fissionable material than they have declared. 17. Not all fissionable isotopes can sustain a chain reaction. 18. Breeder reactors are specifically designed to create more fissionable material than they consume. 19. Nuclear Energy Minister Viktor Mikhailov has insisted no warheads or fissionable materials are missing. 20. Packed inside the zirconium cladding are pellets of uranium oxide or other fissionable materials.