TEPCO risks all at Fukushima

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19. You are trying to confuse the issue.

Conflating high energy, nuclear radiation i.e.,gamma radiation, with light and other radio waves? Really? Gamma rays may be considered electromagnetic radiation, but they sure do not behave like radio waves or light,
The radiation we are talking about here is radioactivity, of the type some here are overly paranoid about. Yeah that radiation. And yes, that type of radiation, is "hard radiation" and that does go in a straight line. At least until it hits a nucleus of an atom and is ether absorbed or it knocks something out.
Isotopes are elements, atoms, that differ from the "normal" elements only by the number of neutrons it has. Isotopes behave like the chemical elements they are. The radiation from the isotopes does go in a straight line. The isotopes themselves are the source of the radioactivity, not the radiation itself.
Radiation from a nuclear power plant? "Skyshine"? A term taken for astronomy for light pollution from a city? Really? There is more radiation radioactivity from a coal burning plant. Or granite counter tops, or even common bricks, than from your run of the mill nuclear power plant. And don't forget the potassium in the common banana. And while we are on the subject, did you know 3 feet of earth will stop most gamma radiation? So those mountains will shield radioactivity from Fukushima.
No wonder some people are paranoid and ignorant about nuclear power. They do not understand enough high school physics to know what they are talking about.