PROCESS FOR TRAPPING GASEOUS RUTHENIUM ON POLYVINYL PYRIDINE, MORE PARTICULARLY USABLE FOR RECOVERING RADIOACTIVE RUTHENIUM FROM IRRADIATED NUCLEAR FUELS

摘要

DESCRIPTIVE The invention relates to a process for trapping gaseous ruthenium on polyvinyl pyridine, more particularly usable for recovering radioactive ruthenium from irradiated nuclear fuels. This process consists of contacting a gas containing ruthenium in gaseous form with an adsorbent (11b) constituted by a vinyl pyridine polymer or copolymer for fixing the ruthenium to the latter. The gas can be constituted by vapours from a concentrate of fission products containing ruthenium, which has been heated (at 31) in the presence of an oxidizing agent for volatilizing the ruthenium. (Fig. 1) B. 10821 MDT