Thank you LJ and Tom for your input, there is something

I should point out though.

1) The 18.7 million kwH is for one kilogram or 2.2 pounds of uranium 235.
2) I do not have any ‘kinetic energy’ information on the other 567000 plus kilograms of radioactive elements that were released into the atmosphere between 1944 and 1987, and I do not know how many tons of radioactive materials have ‘leaked’ into the atmosphere since 1987. But I would estimate that by multiplying LJ’s figures by 500000 might not be excessive.
3) It is true that if LJ’s figures are correct and we multiply them by half a million the total heat rise of the atmosphere still is not enough to ‘boil’ any oceans. But suppose that this amount of radioactive energy is added to the, all ready, energetic molecules in the thermosphere, could those molecules, atoms, or ions that are up there, gain enough kinetic energy to move faster than seven miles per second.? As I understand it some of them all ready do. See this site;

http://www.doc.mmu.ac.uk/aric/eae/Atmosphere/Older/Exosphere.html

about exosphere and thermosphere, also this site for

http://www.physlink.com/Education/AskExperts/ae158.cfm

escape velocity.