Well a quick google has it that energy desnsity of Uranium is about 20 times that of coal. Not clear as to whether thats raw uranium or refined. I suspect raw mined.
It also makes the point that uranium costs are more or less insignificant in the context of a normal power station, and that in any case fast breeder reactors would become economic if fuel prices were to rise.
Those make more fuel than they burn.
To get the uranium and the power station running takes 1.35% of the energy it generates.
In fact apart from hydro power, ts about the least energy wasteful of anything.
"Rashad & Hammad conclude that the life cycle CO2 emission coefficient for nuclear power, on the basis of centrifuge enrichment, is 2.7% of that for coal-fired generation. This is consistent with other figures based on fossil fuel inputs."
So, by going all nuclear electric for power generation and transport we could essentially get rid of abut 85% of all our carbon emissions.
(Accepting that aircraft need fossil fuel and a proportion of transport will always need it).
Now, what other here now cost effective technology can do that?