دورية
Study on cesium compound formation by chemical interaction of CsOH and concrete at elevated temperatures
| العنوان: | Study on cesium compound formation by chemical interaction of CsOH and concrete at elevated temperatures |
|---|---|
| المؤلفون: | Luu, Vu Nhut, Nakajima, Kunihisa |
| المصدر: | Journal of Nuclear Science and Technology; February 2023, Vol. 60 Issue: 2 p153-164, 12p |
| مستخلص: | ABSTRACTRecently, extremely high dose rates were detected in the three-layer concrete plugs of the units 2 and 3 at the Fukushima Daiichi Nuclear Power Plant. The high dose rates suggest that there are some trapping effects of radioactive materials on shield plugs when gas species and aerosols (e.g. CsOH and CsI) are released from the reactor through the plug layers. To determine the trapping mechanism, concrete, rock-forming aggregates, and relevant minerals are pulverized and mixed with CsOH monohydrate, followed by heating at different temperatures to clarify the chemical interaction. The results showed that interactions of CsOH and CaCO3in concrete occurred even at room temperature to form Cs2CO3(H2O)3. The interaction with aggregates occurred above 100°C and resulted in the formation of CsAlSiO4. Additionally, amorphous and crystalline SiO2also interacted with CsOH and formed CsHSi2O5at around 250°C. These results suggest that formation of Cs2CO3(H2O)3might be one of the main trapping mechanisms at shield plugs because CaCO3is commonly formed on the concrete surface and reacts with CsOH at room temperature. |
| قاعدة البيانات: | Supplemental Index |
PDF full text from Publisher 
Full Text Finder | تدمد: | 00223131 18811248 |
|---|---|
| DOI: | 10.1080/00223131.2022.2089263 |