As I perused a sampling of the thousands of ominous articles on the "nuclear catastrophe" in Japan (some TV versions of which include mushroom clouds), I found no statement that any containment vessel has ruptured, although no shortage of insinuations that there has been a rupture. So, I assume that none has ruptured, meaning that there is no danger that significant radiation will escape. I again cite an article from LPAC, the one source of information that is willing to state the facts without concern for the oligarchy's wishes to rid the world of nuclear power, and most of humanity:
One may imagine what would happen in the case of reactor meltdowns of Fukushima Daiichi and Fukushima Daini power plants. We know what happened after reactor meltdowns in the 1979 Three Mile Island accident and the 1986 Chernobyl catastrophes. In Japan, the result would be similar as in Three Mile Island power plant, where the reactor was protected by a thick concrete containment, which efficiently retained fission products: There was almost no emission of radionuclides into the atmosphere, except innocuous radioactive noble gases, and practically zero radiation exposure of the population. There is a zero possibility of repeating the scenario from the Chernobyl nuclear power plant, which was not fitted with a containment vessel, and where for ten days, the radioactivity was freely escaping from the melted reactor, roasting in burning graphite used for its construction. But, even if by a magic miracle the containments of Japanese plants perished in the quake or tsunami, the residents around them would not be harmed by radiation. This we learned from the Chernobyl disaster in which not a single person died among the population, AS ACCORDING TO A RECENT REPORT OF UNITED NATIONS SCIENTIFIC COMMITTEE ON THE EFFECTS OF ATOMIC RADIATION (UNSCEAR 2011), THE RADIATION DOSES FROM CHERNOBYL FALLOUT (OF ABOUT 1 mSv PER YEAR) WERE BELOW THE NATURAL RADIATION, TOO SMALL TO PRODUCE ANY EFFECT. [emphasis added]
Yet we are told that tens of thousands of people have died from the effects of the Chernobyl disaster.