Abstract
Ceramic solid forms immobilizing Cs and/or Sr were produced by the calcination of Cs-mordenite and Sr-zeolite A at 1,200°C for 1 h. Cesium and strontium were fixed in the mineral phases of pollucite (CsAlSi 2O6) and Sr-feldspar (SrAl2Si2O 8), respectively, and they were uniformly dispersed in the solid forms. The contents of Cs, Sr and Na in the solid forms produced from (Cs,Sr)A zeolite were determined to be 12.5, 17.4 and 1.2 wt%. The solid forms showed no thermal change up to 900°C. The compressive strength of solid forms increased with decreasing particle size of starting zeolites, yielding the value above 1.2 GPa for the Cs products, reachability of Cs was in the order, 0.1 M HNO3 > 0.1 M NaOH > 0.1 M NaCl > deionized water (DW). The Sr products had lower leach rate compared with Cs products, and no Sr was detected in DW up to 90°C. No appreciable alteration was observed on the outermost surface of the solid forms exposed to DW at 90°C for 30 days. The ceramic solid forms immobilizing Cs and Sr are thus promising for the effective utilization of these nuclides.
Original language | English |
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Pages | 553-560 |
Number of pages | 8 |
Publication status | Published - 2002 Dec 1 |
Event | International Conference - Nuclear Energy for New Europe 2002, Proceedings - Kranjska Gora, Slovenia Duration: 2002 Sep 9 → 2002 Sep 12 |
Other
Other | International Conference - Nuclear Energy for New Europe 2002, Proceedings |
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Country/Territory | Slovenia |
City | Kranjska Gora |
Period | 02/9/9 → 02/9/12 |
ASJC Scopus subject areas
- Nuclear Energy and Engineering