Smuggling can potentially provide fissile material for nuclear weapons or a wider range of radioactive materials for use in ‘dirty bombs’.
No natural reactors exist today, as the relative density of fissile uranium has now decayed below that needed for a sustainable reaction.
For example, fissile slates tend to yield much flatter particles than massive granites.
The shales are conspicuously fissile throughout the section and, along with the associated carbonates, tend to become increasingly red-colored toward the top of the member.
As a general rule, however, the biggest hurdle for a would-be nuclear power is the acquisition of fissile material - enriched uranium or plutonium.
It also is the toxic and radioactive byproduct of enriched uranium, the fissile material in nuclear weapons.
It resumed the production, and testing of uranium enrichment centrifuges that can make fissile material for nuclear reactors or weapons.
This horizon, up to 1.3 m thick, is a black, highly fissile shale.
The oil shales are very fissile, non-laminated, dark brown to black and have a bituminous smell, whereas the less carbonaceous beds are weakly fissile .
The fossiliferous horizons occur in greenish to greyish siltstones and brown to black fissile shales associated with mollusc shells.