Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 328, Issue 1, Pages 195-203Publisher
SPRINGER
DOI: 10.1007/s10967-021-07639-6
Keywords
Strontium-90; Chlorination reaction; Concrete waste; Decontamination; Decommissioning
Funding
- Nuclear R&D program of the Korean Ministry of Science and ICT [2017M2A8A5015147]
- National Research Foundation of Korea [2017M2A8A5015147] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The study indicates that chlorination reaction is a feasible method for treating Sr-90-contaminated concrete waste. Thermodynamic calculations show that SrO can be efficiently converted into SrCl2 at high temperatures, with CaO exhibiting higher conversion ratios and CaCO3 showing lower ratios.
The feasibility of the chlorination reaction as a decontamination technique for Sr-90-contaminated concrete waste was investigated via thermodynamic and experimental approaches. Thermodynamic calculations suggested that SrO reacts with chlorine prior to CaO, CaCO3, and MgO, while other oxides remain in their oxide forms. It was found experimentally that a temperature of at least 700 degrees C is required to convert more than 40% of SrO into SrCl2. A set of comparison experiments performed at various temperatures verified that CaO exhibits higher conversion ratios than those of SrO, while significantly lower ratios were observed with CaCO3.
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