Engineered product storage under the advanced fuel cycle initiative. Part II: Conceptual storage scenarios

Physical properties of an alumino-silicate waste form for cesium and strontium

“…The true density of the sintered product was 3 g/cm 3 . There was an increase in porosity ($20%) with an increase in waste loading ($20%) for samples prepared with the chloride feed solution.…”

“…In [2], we described the thermal properties of potential storage media for cesium and strontium separated from nuclear fuel using the UREX+ process. In [3], we described the estimated storage form volumes and potential storage scenarios. However, those studies were performed based on theoretical properties since the fabrication of waste forms containing both cesium and strontium is largely novel.…”

“…One study [6] described a multi-step process with cesium hydroxide, water, aluminum, powder, and SiO 2 as starting materials to prepare a sol which was hydrothermally processed at 220°C for 2-24 h to produce a dry powder. They achieved 95% theoretical density after sintering at 1500°C for 10 h. Yanagisawa et al [7] created pollucite structures for cesium by hydrothermal alteration of alumino-silicate, quartz, and Al(OH) 3 . They found that pollucite could be formed at 200°C under alkaline conditions.…”