on the surface the generation of power by nuclear fission, fusion or other means seems cheap, but no one knows the total long term costs, as the waste remains radio active for many thousand years....there is no wayu to put a price tag on this EXPENSE...

of course there are down sides to other means of power generation...
coal, oil, wind, hydro, even solar panels need to be manufactured
possibly involving some polluting. Some are finite, using limited resources, some add pollution to the air.

But non have the hazardous waste that nuclear power leaves behind.
There is a plna to bury radiioactive waste in salt caves...well,
water is always able to dissolve salt....

the plume form Chernobyl drifted over many countries,
contaminating children's play grounds, reindeer grazing
grounds and many were effected.....not just the surrounding
territory.