| 학회 | 한국화학공학회 |
| 학술대회 | 2013년 봄 (04/24 ~ 04/26, 광주 김대중컨벤션센터) |
| 권호 | 19권 1호, p.597 |
| 발표분야 | 열역학 |
| 제목 | Equilibrium Calculation on Oxidation of Cs-U-O Compounds at High Temperature under Four Different Gas Flows |
| 초록 | Cesium in SNFs which are supposed to be treated by a dry process in high temperature is an important element owing to its high radioactivity and heat load. The main component in SNFs is uranium and, therefore, cesium would exist with uranium oxides. In this work, component changes of Cs–U–O (cesium uranate) systems were calculated to design an oxidizing reactor and solid compositions were estimated with respect to temperatures and gas flow conditions. Prior to calculating the component changes, stable cesium compounds with uranium oxide were identified by using TPP calculations. The results of the analysis at three temperatures of 500, 1000, and 1400 oC showed that cesium compounds of Cs2U2O7 and Cs2UO4 were stable under realistic partial pressures of Cs and O2 throughout the temperature range. Gas flow conditions included O2, air, Ar with 0.001% H2O, and Ar with 4% H2 to oxidize or reduce the complex cesium uranates. The reactions of Cs2U2O7 in Ar with 4% H2 showed that all of the cesium elements were removed from the reactor while those of Cs2UO4 at 1400 oC in O2, air, and Ar with 0.001% H2O dissociated it into Cs2U2O7 and Cs2O. |
| 저자 | 박소영, 박병흥 |
| 소속 | 한국교통대 |
| 키워드 | Cesium uranate; Equilibrium calculation |
| 원문파일 | 초록 보기 |
