Development of Impregnated Agglomerate Pelletization (IAP) process for fabrication of (Th,U)O2 mixed oxide pellets |
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| Authors: | PM Khot YG Nehete AK Fulzele Chetan Baghra AK Mishra Mohd Afzal JP Panakkal HS Kamath |
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| Affiliation: | 1. Department of Chemical Engineering, West Virginia University, P.O. Box 6106, Morgantown, WV 26506, USA;2. Department of Mechanical and Aerospace Engineering, West Virginia University, P.O. Box 6106, Morgantown, WV 26506, USA;1. Institute for Materials Research, Tohoku University, Sendai, Japan;2. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, USA;3. Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Japan;4. Fusion Safety Program, Idaho National Laboratory, Idaho Falls, USA;5. Hydrogen Isotope Research Center, University of Toyama, Japan;6. Institute of Advanced Energy, Kyoto University, Kyoto, Japan;7. Department of Helical Plasma Research, National Institute for Fusion Science, Toki, Japan;1. Department of Environmental & Chemical Convergence Engineering, Daegu University, Gyeongsan, Republic of Korea;2. Department of Environmental Engineering, Chungnam National University, Daejeon, Republic of Korea;3. Mechanical Process Research Group, Engineering Center, POSCO E&C, Yeonsu, Incheon, Republic of Korea;1. Department of Chemistry, University of Malakand, Chakdara, Dir (Lower), Khyber Pakhtunkhwa, Pakistan;2. Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan;3. Department of Physics, University of Sargoda, Sargoda, Pakistan;4. Department of Chemistry, Bahauddin Zakariya University Sahiwal Campus, Sahiwal, Pakistan |
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| Abstract: | Impregnated Agglomerate Pelletization (IAP) technique has been developed at Advanced Fuel Fabrication Facility (AFFF), BARC, Tarapur, for manufacturing (Th,233U)O2 mixed oxide fuel pellets, which are remotely fabricated in hot cell or shielded glove box facilities to reduce man-rem problem associated with 232U daughter radionuclides. This technique is being investigated to fabricate the fuel for Indian Advanced Heavy Water Reactor (AHWR). In the IAP process, ThO2 is converted to free flowing spheroids by powder extrusion route in an unshielded facility which are then coated with uranyl nitrate solution in a shielded facility. The dried coated agglomerate is finally compacted and then sintered in oxidizing/reducing atmosphere to obtain high density (Th,U)O2 pellets. In this study, fabrication of (Th,U)O2 mixed oxide pellets containing 3–5 wt.% UO2 was carried out by IAP process. The pellets obtained were characterized using optical microscopy, XRD and alpha autoradiography. The results obtained were compared with the results for the pellets fabricated by other routes such as Coated Agglomerate Pelletization (CAP) and Powder Oxide Pelletization (POP) route. |
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