I'd start here (the Health Physics site at U Mich) http://www.sph.umich.edu/group/eih/UMSCHPS/food.htm It will lead you to a much interesting info, including the FDA final rule on meat irradiation (3-Dec-97). The FDA rule is hard reading, but it contains very good references and a thorough dicussion of the scientific issues. John Moulder (jmoulder@its.mcw.edu)