The uranium fuel for nuclear power plants is not generally considered of high enough grade to be used in weapons.
Therefore it is impossible to build a fast reactor using only natural uranium fuel.
The highly enriched uranium fuel is being put into special drums.
But the 'decay heat' from the reaction was still enough to cause the uranium fuel to begin to melt.
That argument made sense when the uranium fuel was scarce and expensive; in fact, it has not been so for years.
Uranium fuel cannot be used in bombs unless it is enriched.
But it would like to prevent Russia from selling uranium fuel on the world market.
The expert said the reactor still appeared to have its original load of uranium fuel.
The higher plutonium isotopes are created when the uranium fuel is used for a long time.
Low-enriched uranium fuels all but a handful of nuclear power plants.