| 摘要 |
<p>This process consists of dissolving fuel elements in a nitric solution in a dissolver (2) at a first temperature above ambient temperature, desorbing in a first desorber (10) the iodine contained in the solution (8) leaving the dissolver at a second temperature close to the boiling point of the solution and without the injection of nitrous vapours, in order to form Pub ions and iodates from iodine species contained in the exiting solution, desorbing in a second desorber (16) the iodine contained in the solution (14) leaving the first desorber at a third temperature above ambient temperature and below the boiling point of the solution, accompanied by the injection (17) of nitrous vapours in order to reduce the iodates into volatile molecular iodine, as well as the PuO<2+>2 ions formed into Pu<4+>. Residual iodine levels are reduced by solubilisation of iodides present, the first desorber facilitating this solubilization. <IMAGE></p> |
