NCRP has a publication on Consumer Products which has dose comparisons, Number 56. Also Number 115 is Risk estimares for Radiation protection. These are a start. Sandy Perle Supervisor Health Physics Florida Power and Light Company (407) 694-4219 office (407) 694-3706 fax Homepage: http://www.lookup.com/homepages/54398/home.html DISCLAIMER: All opinions expressed are mine alone