Radiochemical reprocessing of vanadium–chromium–titanium alloys after fusion reactor demo decommissioning

Recycling of vanadium alloys in fusion reactors

“…Taking as a guide our estimates of element distribution between the aqueous and organic phases, we developed a schematic diagram of V-Cr-Ti alloy radiochemical reprocessing including the separation of alloy components and their purification from activation products [3,4]. During recent years this diagram was continually developed and made more accurate.…”

“…The purification factors sufficient to recover V, Cr and Ti with EDR below 12 lSv/h for a Russian DEMO-S fusion reactor with equivalent fluence of 35 MW yr/m 2 [1] were determined in earlier work [3][4][5]. These purification factors have been now recalculated for neutron-induced activation levels obtained from the EASY-2005 system [6] for conditions of the Plant Model 2 outboard blanket considered in the European fusion 'power plant conceptual study (PPCS)' with an equivalent fluence of 10 MW yr/m 2 [7].…”

Radiochemical reprocessing of V–Cr–Ti alloy and its feasibility study

“…1. The technological steps include the alloy dissolution in nitric acid [2] and reprocessing of the solution by extraction of V, Cr and Ti free of activation products [3][4][5][6][7]. The solution of di-2-ethyl-hexyl-phosphoric acid (D2EHPA) in a hydrocarbon solvent (dodecane) serves as an extractant.…”

An Improved Procedure for Radiochemical Processing of Activated Fision-Reactor-Relevant Vanadium-Chromium-Titanium Alloy

“…Схема включает растворение ВХТ-сплава в азотной кислоте [9], экстракцию титана из азотнокисло-го раствора, экстракцию ванадия при рН = 2,0-2,5 и экстракцию хрома при рН = 4,2-4,5 [10,11]. Усло-вия экстракционного процесса ранее отрабатывались в статическом варианте.…”