Effective capture of gaseous Se during spent nuclear fuel recycling using calcium oxide pellets: Optimization, performance, and practical implications
The continuous utilization of nuclear energy has led to the accumulation of spent nuclear fuel (SNF) containing uranium, transuranium, and fission products (FPs). Reprocessing and pyrochemical methods have shown the potential for SNF reuse, thereby reducing its environmental impact. Voloxidation, a...
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Elsevier
2025-01-01
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| Series: | Nuclear Engineering and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573324004005 |
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| author | Seok-Min Hong Chang Hwa Lee Jae-Hwan Yang Namcheol Kim |
| author_facet | Seok-Min Hong Chang Hwa Lee Jae-Hwan Yang Namcheol Kim |
| author_sort | Seok-Min Hong |
| collection | DOAJ |
| description | The continuous utilization of nuclear energy has led to the accumulation of spent nuclear fuel (SNF) containing uranium, transuranium, and fission products (FPs). Reprocessing and pyrochemical methods have shown the potential for SNF reuse, thereby reducing its environmental impact. Voloxidation, a pivotal step in SNF recycling, involves thermal treatment in an oxidizing atmosphere to enhance the reactivity. During voloxidation, Se-79, which is a FP with a long half-life, is released as SeO2 under oxidizing conditions, necessitating technologies to capture it. CaO pellets (CPs) were prepared to capture gaseous SeO2. The effects of operating conditions on SeO2 capture performance were investigated. The CP reacts strongly with SeO2 to form CaSeO3, exhibiting a high adsorption capacity of 17.5 mol kg−1 and >99 % efficiency at 700 °C. The mechanical strength and thermal stability assessments indicate suitability for practical applications. Depending on the flow rate, the CP required for SeO2 capture was estimated when processing 1 t of SNF, thereby contributing to the design of effective SeO2 capture systems for safe and sustainable nuclear waste management. |
| format | Article |
| id | doaj-art-2b5b751c7e634c6ab11a2344d9f46a87 |
| institution | Kabale University |
| issn | 1738-5733 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj-art-2b5b751c7e634c6ab11a2344d9f46a872025-01-12T05:24:38ZengElsevierNuclear Engineering and Technology1738-57332025-01-01571103152Effective capture of gaseous Se during spent nuclear fuel recycling using calcium oxide pellets: Optimization, performance, and practical implicationsSeok-Min Hong0Chang Hwa Lee1Jae-Hwan Yang2Namcheol Kim3Fuel Cycle Process Division, Korea Atomic Energy Research Institute (KAERI), 111 Daedeok-daero 989 Beon-gil, Yuseong-gu, Daejeon, 34057, Republic of Korea; Corresponding author.Fuel Cycle Process Division, Korea Atomic Energy Research Institute (KAERI), 111 Daedeok-daero 989 Beon-gil, Yuseong-gu, Daejeon, 34057, Republic of KoreaDepartment of Environmental & IT Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Republic of KoreaFuel Cycle Process Division, Korea Atomic Energy Research Institute (KAERI), 111 Daedeok-daero 989 Beon-gil, Yuseong-gu, Daejeon, 34057, Republic of Korea; Quantum Energy Chemical Engineering, KAERI School, University of Science and Technology (UST), Daejeon 34113, Republic of KoreaThe continuous utilization of nuclear energy has led to the accumulation of spent nuclear fuel (SNF) containing uranium, transuranium, and fission products (FPs). Reprocessing and pyrochemical methods have shown the potential for SNF reuse, thereby reducing its environmental impact. Voloxidation, a pivotal step in SNF recycling, involves thermal treatment in an oxidizing atmosphere to enhance the reactivity. During voloxidation, Se-79, which is a FP with a long half-life, is released as SeO2 under oxidizing conditions, necessitating technologies to capture it. CaO pellets (CPs) were prepared to capture gaseous SeO2. The effects of operating conditions on SeO2 capture performance were investigated. The CP reacts strongly with SeO2 to form CaSeO3, exhibiting a high adsorption capacity of 17.5 mol kg−1 and >99 % efficiency at 700 °C. The mechanical strength and thermal stability assessments indicate suitability for practical applications. Depending on the flow rate, the CP required for SeO2 capture was estimated when processing 1 t of SNF, thereby contributing to the design of effective SeO2 capture systems for safe and sustainable nuclear waste management.http://www.sciencedirect.com/science/article/pii/S1738573324004005Spent nuclear fuel (SNF) recyclingCaO pelletSeO2 captureAdsorptionCapture efficiency |
| spellingShingle | Seok-Min Hong Chang Hwa Lee Jae-Hwan Yang Namcheol Kim Effective capture of gaseous Se during spent nuclear fuel recycling using calcium oxide pellets: Optimization, performance, and practical implications Nuclear Engineering and Technology Spent nuclear fuel (SNF) recycling CaO pellet SeO2 capture Adsorption Capture efficiency |
| title | Effective capture of gaseous Se during spent nuclear fuel recycling using calcium oxide pellets: Optimization, performance, and practical implications |
| title_full | Effective capture of gaseous Se during spent nuclear fuel recycling using calcium oxide pellets: Optimization, performance, and practical implications |
| title_fullStr | Effective capture of gaseous Se during spent nuclear fuel recycling using calcium oxide pellets: Optimization, performance, and practical implications |
| title_full_unstemmed | Effective capture of gaseous Se during spent nuclear fuel recycling using calcium oxide pellets: Optimization, performance, and practical implications |
| title_short | Effective capture of gaseous Se during spent nuclear fuel recycling using calcium oxide pellets: Optimization, performance, and practical implications |
| title_sort | effective capture of gaseous se during spent nuclear fuel recycling using calcium oxide pellets optimization performance and practical implications |
| topic | Spent nuclear fuel (SNF) recycling CaO pellet SeO2 capture Adsorption Capture efficiency |
| url | http://www.sciencedirect.com/science/article/pii/S1738573324004005 |
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