Hi All, Reg Guide 8.20 is not (that I know of) available on the net. We keep a list of the ones we know of at: http://www-personal.umich.edu/~bbusby/law.htm#NRC We also try to keep up with the DOE orders, CFRs, ect. If someone knows of others, let us know. -Bruce Busby bbusby@umich.edu