> We wouldn't. The point is that the above example shows that > for the given conditions that natural reactor was exposed to > the granite, sandstone and clays do a good job at keeping the > plutonium and other wastes in place. You can then use that > knowledge, and other geological knowledge, to make sure that > a proposed dump will be exposed to similar conditions. I disagree. You are confusing correlation with cause-and-effect. Without much much more proof (much more than 1 non-random sample) I do not trust anyone to correctly identify the factors that made this site stable. Not for anything as important as dumping spent fuel. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: www.voti.nl/hvu -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist