| Popis: |
Though the techniques to separate weapons-grade plutonium from irradiated uranium and to manage radioactive waste from these operations in the United States and Russia have differed, both Nations have similar results. Among the wastes produced since the 1940s, particularly in the United States, are large quantities of alkaline sludge and supernatant liquid in underground storage tanks. Because the wastes are heterogeneous, and unique, the United States Department of Energy (DOE) and Minatom (in Russia) have supported co-operative studies of the chemistry of transuranium elements and technetium in alkaline media, including their removal from alkaline waste solution by co-precipitation in the Method of Appearing Reagents. Results of this work, performed since 1995 at the Hanford Site, United States, and especially at the Institute of Physical Chemistry, Moscow, are summarised in light of the historical waste generation and management practices. |
