Engineering Design of a Mechanical Decladder for Spent Nuclear Rod-Cuts
A practical scale mechanical decladder that can slit spent nuclear fuel rod-cuts (hulls + pellets) of several tens of kg HM/batch is being developed to supply UO2 pellets to a voloxidation process. The mechanical decladder is an apparatus for separating and recovering fuel material and cladding tube...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2019/9273503 |
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| author | Young-Hwan Kim Yung-Zun Cho Young-Soon Lee Jin-Mok Hur |
| author_facet | Young-Hwan Kim Yung-Zun Cho Young-Soon Lee Jin-Mok Hur |
| author_sort | Young-Hwan Kim |
| collection | DOAJ |
| description | A practical scale mechanical decladder that can slit spent nuclear fuel rod-cuts (hulls + pellets) of several tens of kg HM/batch is being developed to supply UO2 pellets to a voloxidation process. The mechanical decladder is an apparatus for separating and recovering fuel material and cladding tubes by horizontally slitting the cladding tube of a fuel rod and a defective irradiated fuel rod. In this study, we address the engineering design of the mechanical decladder for the pretesting of rod-cut slitting. To obtain the requirements of the mechanical decladder, we first manufactured a slitter for testing based on the decladding and shearing conditions of hulls and pellets. The performance test of the testing device for decladding was carried out using a 2-CUT blade module and a 3-CUT blade module. We evaluated the decladding methods for the mechanical decladder and selected the 3-CUT blade module based on the results. A buckling measurement instrument was used to perform a buckling verification test according to the length of a rod-cut and to determine decladder dimensions. The optimum decladding rod-cut length for buckling prevention was calculated. Furthermore, we analyzed the decladding mechanism for various slitting methods. Design/fabrication and preliminary tests of the practical scale mechanical decladder were also performed. For this purpose, we constructed the main mechanism by utilizing the SolidWorks modeling and analysis program and fabricated a new mechanical decladder. Based on the derived requirements, a mechanical decladder with three main modules was designed and fabricated for testing. Simulated rod-cuts of zircaloy were also manufactured to test the basic performance of the decladder, and a data acquisition system was constructed using RSC 232 to measure decladding force and velocity. In the basic test, the rod-cut was completely sectioned into three evenly spaced locations by the new mechanical decladder. |
| format | Article |
| id | doaj-art-eb72c2cd0b8c4e528db12b4b6932cbf3 |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-eb72c2cd0b8c4e528db12b4b6932cbf32025-02-03T06:48:37ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832019-01-01201910.1155/2019/92735039273503Engineering Design of a Mechanical Decladder for Spent Nuclear Rod-CutsYoung-Hwan Kim0Yung-Zun Cho1Young-Soon Lee2Jin-Mok Hur3Korea Atomic Energy Research Institute, Daedeok-daero 989-111, Yuseong-gu, Daejeon 305-353, Republic of KoreaKorea Atomic Energy Research Institute, Daedeok-daero 989-111, Yuseong-gu, Daejeon 305-353, Republic of KoreaKorea Atomic Energy Research Institute, Daedeok-daero 989-111, Yuseong-gu, Daejeon 305-353, Republic of KoreaKorea Atomic Energy Research Institute, Daedeok-daero 989-111, Yuseong-gu, Daejeon 305-353, Republic of KoreaA practical scale mechanical decladder that can slit spent nuclear fuel rod-cuts (hulls + pellets) of several tens of kg HM/batch is being developed to supply UO2 pellets to a voloxidation process. The mechanical decladder is an apparatus for separating and recovering fuel material and cladding tubes by horizontally slitting the cladding tube of a fuel rod and a defective irradiated fuel rod. In this study, we address the engineering design of the mechanical decladder for the pretesting of rod-cut slitting. To obtain the requirements of the mechanical decladder, we first manufactured a slitter for testing based on the decladding and shearing conditions of hulls and pellets. The performance test of the testing device for decladding was carried out using a 2-CUT blade module and a 3-CUT blade module. We evaluated the decladding methods for the mechanical decladder and selected the 3-CUT blade module based on the results. A buckling measurement instrument was used to perform a buckling verification test according to the length of a rod-cut and to determine decladder dimensions. The optimum decladding rod-cut length for buckling prevention was calculated. Furthermore, we analyzed the decladding mechanism for various slitting methods. Design/fabrication and preliminary tests of the practical scale mechanical decladder were also performed. For this purpose, we constructed the main mechanism by utilizing the SolidWorks modeling and analysis program and fabricated a new mechanical decladder. Based on the derived requirements, a mechanical decladder with three main modules was designed and fabricated for testing. Simulated rod-cuts of zircaloy were also manufactured to test the basic performance of the decladder, and a data acquisition system was constructed using RSC 232 to measure decladding force and velocity. In the basic test, the rod-cut was completely sectioned into three evenly spaced locations by the new mechanical decladder.http://dx.doi.org/10.1155/2019/9273503 |
| spellingShingle | Young-Hwan Kim Yung-Zun Cho Young-Soon Lee Jin-Mok Hur Engineering Design of a Mechanical Decladder for Spent Nuclear Rod-Cuts Science and Technology of Nuclear Installations |
| title | Engineering Design of a Mechanical Decladder for Spent Nuclear Rod-Cuts |
| title_full | Engineering Design of a Mechanical Decladder for Spent Nuclear Rod-Cuts |
| title_fullStr | Engineering Design of a Mechanical Decladder for Spent Nuclear Rod-Cuts |
| title_full_unstemmed | Engineering Design of a Mechanical Decladder for Spent Nuclear Rod-Cuts |
| title_short | Engineering Design of a Mechanical Decladder for Spent Nuclear Rod-Cuts |
| title_sort | engineering design of a mechanical decladder for spent nuclear rod cuts |
| url | http://dx.doi.org/10.1155/2019/9273503 |
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