Speaker
Ms
Bella Zubekhina
(researcher, V.G. Khlopin Radium Institute (KRI), St-Petersburg, Russia)
Description
Immobilization of bulk liquid high level waste (HLW) in Synroc ceramic is well-known reliable way for final isolation of waste from biosphere. It is proposed the alternative method of synthesis of titanate Synroc-like ceramic. Radionuclide incorporation into crystalline titanate host-phases can be provided as a result of direct radionuclide sorption from liquid HLW using non-selective sorbent – layered hydrazinium titanate (LHT-9). Such an approach allows excluding expensive multi-stage procedure of precursor preparation. The precipitate obtained after sorption can be easily transformed into Synroc-like ceramic by cold pressing and sintering in air at 1000-1100°. The highly radioactive samples of titanate ceramic loaded with 10 wt.% of real HLW were synthesized and studied at KRI hot-cell facility. Chemical durability of these samples was tested using MCC-1 static leach test (in distilled water at 90°C) and the leach rate was found to be comparable with Synroc ceramic.
Primary author
Ms
Bella Zubekhina
(researcher, V.G. Khlopin Radium Institute (KRI), St-Petersburg, Russia)
Co-authors
Dr
Boris Burakov
(V.G. Khlopin Radium Institute (KRI), St-Petersburg, Russia)
Dr
Sergey Britvin
(Saint-Petersburg State University, St-Petersburg, Russia)
Mr
Valery Mararitsa
(Socium Ltd, St-Petersburg, Russia)
Mr
Yuri Demidov
(Socium Ltd, St-Petersburg, Russia)
