Hi. Thanks for the reply. I´m new to Steemit, still hooked on facebook. I think with all the critical problems that mankind is facing at the moment, and they are many, Fukushima has to be the most serious. I am also researching the subject. Even understanding how to quantify radioactive exposure is complicated. If I can bring anyone with understanding of the subject into the discussion, maybe it´ll get interesting! In the meantime, maybe this will interst you : https://news.mit.edu/2011/explained-radioactivity-0328 (I´ve no idea yet how to bring the material directly here, sorry!!!)