RADSAFERS: I recall seeing a note posted on RADSAFE within the last few weeks which referenced an old standard for the design of hot cells. Unfortunately, I deleted the note because I did not recognize a need for the information at that time. Does anyone recall this reference? Thank you in advance. Jim Dwyer USNRC Region I King of Prussia, PA (610)337-5309 Email: JPD1@ NRC.GOV