Radioiodine removal from air streams with impregnated UVIS® carbon fiber

Abstract

This study is devoted to the ability of carbon fiber material samples impregnated with various amounts of barium iodide and triethylenediamine to remove radioactive methyliodide from air streams. The main sorption characteristics of impregnated UVIS® carbon fiber were determined and the use of this material for purifying of technological gas flows at nuclear power plants was evaluated. The methyliodide trapping efficiency by samples impregnated with barium iodide, TEDA, and their mixture was 83.4 ± 0.8%; 93.1 ± 0.6% and 93.5 ± 0.7% respectively, under the same conditions. The study established a significantly higher capacity (8.3 ± 0.07 mg/cm2) of samples impregnated simultaneously with both chemical compounds toward methyliodide. Under the same test conditions, the values of this parameter for the samples impregnated separately with TEDA and BaI2 were 2.85 ± 0.05 mg/cm2 and 0.86 ± 0.04 mg/cm2, respectively.

Keywords

• Gaseous radioactive waste
• Methyliodide sorption
• Iodine-131
• Iodine sorbents
• Sorption-filtering materials