Thanks to all who replied to the request for the subject standard - I now have what I need. Larry Boing Argonne National Laboratory Nuclear Engineering Division/Special Projects 9700 South Cass Avenue / Bldg 208 Argonne, IL 60439 lboing at anl.gov http://www.dd.anl.gov http://www.orau.gov/ddsc/ 630-252-6729 Phone 630-252-7577 Fax