Japan's fight for control of the nuclear power plants damaged in the tsunami, on 11 March followed regain a 9.0 earthquake which questions, and that has people worldwide thought about the effects of radioactive fallout. Here is our top 5 questions and answers from experts of the Union of concerned scientists, an advocacy group culled nuclear safety.
1. Should people in the United States worried about their drinking water?
Edwin Lyman, senior scientist: "I believe that at this time no.." "We need to use a disclaimer no level of radiation is safe, but the risk is proportional to the dose and dilution, who travels thousands of miles as a plume is experienced very significantly."
2. As radioactive water in the cellar and in some tunnel to the reactor building at the end?
Lyman: "it is not clear where it came from." During the last week or the last two weeks, workers on a regular basis have lifted the ship reactor in secondary or into the primary containment structure. It seems that some it deflated the, occurred after fuel damage has occurred. So, that would have a way for highly radioactive water in the containment building. It is possible that it came from that structured and ventilated pathway of the vessel reactor or some other breach of containment, in contrast to some holes on the bottom.
(3) Are the weaknesses of radioactive water expected to continue or deteriorate?
David hole tree, nuclear security program director, "in the last few weeks, the focus was on the reactor cores and the spent fuel pools." You have done by a non-preferred method, that only more and more added to water. The preferred method would be something water from the reactor vessel or spent fuel pool, remove and cool it back, so that your inventory of water remain the same. But they not this option so that you add only water reactor vessels and the spent fuel pools.
The water had somewhere to go, so that it has found its way into the containment building, the cellar, the reactor building, the turbine building. Themselves or floods piling it up all kinds of places that it should be so, and because it now radioactively contaminated everything carries out leaks is that radioactivity with him. For the reactor building and the turbine building, next to the leakage pathways for water you have to also vaporization of material with radioactive isotopes. So, it will be a problem, and it will be a while for them to, first of all, get their hands around it, and second, to clean up.
4. What is the detection of plutonium. Is it a problem?
Hole tree: "plutonium is isotope a default certificate also caesium pose an additional threat 137, and so the presence of plutonium and would require more difficult there and more expensive cleanup." There were sites in the United States, in the plutonium contamination, which successfully, are been restored as the Rocky flats plant (in Colorado), and a company that you know is expensive and difficult. Plutonium, if it is the finest and inhaled, is a particularly strong carcinogen, and you need additional respiratory protection if it substantial plutonium, which potentially could be inhaled. So, I think, it is added to a different folds of the problem.
5. Is Pacific is safe to eat seafood?
Lyman: I would think it is unlikely that for seafood, which are relatively close littered along the Japanese Coast not caught is, but we have done any analysis on this. Even dilute levels of contamination can marine life in particular, how such as mercury in large fish such as tuna focuses to be improved. Also plants such as algae is known that certain isotopes focus, and so are certain types of shells. But I would think certainly in the fishing industry in the region, they are most likely need to take measures to make their catches.
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