| 초록 |
An accumulation of spent fuel has brought a considerable interest due to an environmental issue. Pyroprocessing has been investigated in Korea Atomic Energy Research Institute (KAERI) which can reduce the accumulated spent fuel. In head-end process of pyroprocessing, spent fuels are thermally treated to prepare UO2 pellets for following electrochemical processes, where volatile and semi-volatile fission products are separated from spent fuel matrix and released as gas phase. Within these gases, Cs-137 and I-129 are semi-volatile gases which are highly radioactive and hazardous to environment, therefore it is imperative to develop efficient method for capturing Cs and I. In this study, the capturing system for semi-volatile fission products was developed and capturing characteristics for Cs and I were investigated by using silica-alumina (SA) and silver-exchanged faujasite (AgX) filters. The uncaptured Cs and I were condensed after passing through SA and AgX filters, and they were captured by ultra-low particulated air (ULPA) filter. Water scrubbers were installed at the end of the filters to trap remaining Cs and I particles in the vent gas. |
