METHOD FOR REGENERATION OF SECONDARY PLATINUM radiological PLUTONIUM

摘要

1. A process for regenerating a secondary platinum radiological plutonium comprising heating the platinum secondary scrap in air to form a condensed radioactive plutonium oxide and platinum induction melting to separate it from plutonium oxide, which is conducted in the presence of fluxing agents to form a melt and the platinum-containing slag plutonium oxide, and subsequent separation of the slag from the platinum, wherein the platinum is scrap secondary radioactive contamination of plutonium throughout the volume, as well as n surface layer further comprises a non-radioactive contamination in the form of metal impurities in a larger than plutonium, an amount that before heating secondary platinum scrap removed hydrometallurgy means without destroying the surface of the platinum and heating the secondary platinum scrap lead to its melting and combined with induction melting platinum, which is performed at a ratio of the area of ​​the bath surface to its volume 0,20-0,50 at frequency induction electromagnetic field (20-66) kHz and air blown onto the surface of the melt and at a temperature of (2049-2073) for K (1.0-1.3) p.2. A method according to claim 1, characterized in that the scrap contains platinum nonradioactive secondary pollution in the form of metallic nickel and impurities medi.3. A method according to claim 1, characterized in that the non-radioactive contamination by metal impurity contained in an amount of not less than 1 wt.%, Each at a content 10mas plutonium.%. 4. A method according to claim 1, characterized in that the non-radioactive contamination in the form of metallic impurities removed by means of hydrometallurgy: chemical treatment the secondary scrap platinum with 5