Not to rain on anyone's parade but that picture provided regarding a potential fallout is bullshit. Probably made by someone who sells lead or concrete in the western US. Australian Radiation Services isn't even a mandated program in Australia, and is a private business who have since claimed no affiliation with the graph.
http://www.australian-radiation-services .com.au/ (notice the disclaimer in red)
Until you see a giant headline stating 'CONTAINMENT BREACHED" you have nothing to worry about. Even then, it's a lot like what my nuclear engineering professor used to say (rather candidly) "I have enough sperm to impregnate every woman in the world but I'll be damned until I can find a way to provide it." Which essentially summarizes the foolishness of being worried about a meltdown around 8000km away. Yes, there is a lot of dangerous fissile material present within the reactor core; but in reality we don't have much to worry about.