Challenges in spent nuclear fuel final disposal: conceptual design models |
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作者单位: | Mukhtar Ahmed RANA(Physics Division, Directorate of Science, PINSTECH, P.O. Nilore, lslamabad, Pakistan) ; |
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摘 要: |
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关 键 词: | 核燃料 概念设计模型 自我辐射分解 热反应 |
收稿时间: | 29 December 2007 |
Challenges in spent nuclear fuel final disposal: conceptual design models |
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Authors: | Mukhtar Ahmed RANA |
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Affiliation: | Physics Division, Directorate of Science, PINSTECH, P.O. Nilore, lslamabad, Pakistan |
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Abstract: | The disposal of spent nuclear fuel is a long-standing issue in nuclear technology. Mainly, UO2 and metallic U are used as a fuel in nuclear reactors. Spent nuclear fuel contains fission products and transuranium elements, which would remain radioactive for 104 to 108 years. In this brief communication, essential concepts and engineering elements related to high-level nuclear waste disposal are described. Conceptual design models are described and discussed considering the long-time scale activity of spent nuclear fuel or high level waste. Notions of physical and chemical barriers to contain nuclear waste are highlightened. Concerns regarding integrity, self-irradiation induced decomposition and thermal effects of decay heat on the spent nuclear fuel are also discussed. The question of retrievability of spent nuclear fuel after disposal is considered. |
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Keywords: | Spent nuclear fuel disposal Conceptual design models Self-irradiation induced decomposition Thermal effects |
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