Recycling Hot Lead
J. P. Hageman
Southwest Research Institute worked in cooperation with its client to recycle a large radioactive lead block as shielding for approximately 1,800 Ci of Co-60 sealed sources. The project began with the development of a means to cut apart a lead block that was 13 cm thick, 61 cm thick, and 79 cm long. The lead block had been neutron-activated and weighed approximately 700 kg. The major components of the activated lead were Ag-108m and Sb-125. The block also had 11 aluminum tubes that were running the length of the block and were about 2.5 cm within the block wall; these tubes contained Cs-137 (inside surface) contamination. The block also had two large stainless-steel lifting eyes that had a maximum contact dose rate of 40-45 mSv/hr, primarily from Co-60.
This abstract was presented at the 32nd Annual Midyear Meeting, "Creation and Future Legacy of Stockpile Stewardship Isotope Production, Applications, and Consumption", Sealed Sources, Recycling, and Transmutation Session, 1/24/1999 - 1/27/1999, held in Albuquerque, NM.