So this means you would be happy to be exposed to much higher levels of radiation?
He's already exposed to much higher levels of radiation than he got on the sub, by virtue of presently living on land instead of under the significant radiation shielding of large quantities of water and steel.
If a nuclear plant's workers got as much radiation exposure as airline pilots and crew routinely do, the NERC would come down on the plant like a ton of lead bricks and shut it down for gross violations of government regulations.
As mvpel stated, I am currently exposed to much higher levels of radiation here in Arizona than I was on the nuclear submarine. Does this answer your question?
In reality, the burning of coal releases more radiation than nuclear power stations. The fact is that coal form in the ground, and in its process of formation, absorbs some radioactive elements.