Evaluation of decontamination factor of radioactive methyl iodide on activated carbons at high humid conditions
| Autor: | Seon-Byeong Kim, Bumkyung Seo, Jei-Kwon Moon, Byung-Seon Choi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Activated carbon
020209 energy chemistry.chemical_element 02 engineering and technology Iodine 030218 nuclear medicine & medical imaging 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Diamine 0202 electrical engineering electronic engineering information engineering medicine Decommissioning Moisture Decontamination factor (DF) TK9001-9401 Radiochemistry Radioactive waste Human decontamination Radioactive methyl iodide Nuclear Energy and Engineering chemistry Nuclear engineering. Atomic power Nuclear facilities medicine.drug Methyl iodide Quinuclidine |
| Zdroj: | Nuclear Engineering and Technology, Vol 53, Iss 5, Pp 1519-1523 (2021) |
| ISSN: | 1738-5733 |
| DOI: | 10.1016/j.net.2020.10.020 |
| Popis: | Radioactive iodine (131I) released from nuclear power plants has been a critical environmental concern for workers. The effective trapping of radioactive iodine isotopes from the off-gas stream generated from nuclear facilities is an important issue in radioactive waste treatment systems evaluation. Numerous studies on retaining methyl iodide (CH3I131) by impregnated activated carbons under the high content of moisture have been extensively studied so far. But there have been no good results on how to remove methyl iodide at high humid conditions up to now. A new challenge is to introduce other promising impregnating chemical agents that are able to uptake enough radioactive methyl iodide under high humid conditions. In order to develop a good removal efficiency to control radioiodine gas generated from a high humid process, activated carbons (ACs) impregnated with triethylene diamine (TEDA) and qinuclidine (QUID) were prepared. In addition, the removal efficiencies of the activated carbons (ACs) under humid conditions up to 95% RH were evaluated by applying the standard method specified in ASTM-D3808. Quinuclidine impregnated activated carbon showed a much higher decontamination factor above 1,000, which is enough to meet the regulation index for the iodine filters in nuclear power plants (NPPs). |
| Databáze: | OpenAIRE |
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