Development of stabilization treatment technology for radioactive aluminum waste
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- SEKI Misaki
- Japan Atomic Energy Agency
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- FUJITA Yoshitaka
- Japan Atomic Energy Agency
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- FUJIHARA Yasuyuki
- Institute for Integrated Radiation and Nuclear Science, Kyoto University
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- J. Zhang,
- Institute for Integrated Radiation and Nuclear Science, Kyoto University
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- YOSHINAGA Hisao
- Institute for Integrated Radiation and Nuclear Science, Kyoto University
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- SANO Tadafumi
- Kindai University Atomic Energy Research Institute
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- HORI Junichi
- Institute for Integrated Radiation and Nuclear Science, Kyoto University
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- NAGATA Hiroshi
- Japan Atomic Energy Agency
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- OTSUKA Kaoru
- Japan Atomic Energy Agency
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- OMORI Takazumi
- Japan Atomic Energy Agency
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- TAKEUCHI Tomoaki
- Japan Atomic Energy Agency
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- IDE Hiroshi
- Japan Atomic Energy Agency
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- TSUCHIYA Kunihiko
- Japan Atomic Energy Agency
Bibliographic Information
- Other Title
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- 放射性アルミニウム廃棄物の安定化処理技術の開発
- ホウシャセイ アルミニウム ハイキブツ ノ アンテイカ ショリ ギジュツ ノ カイハツ
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Abstract
<p> The core structural materials of the Japan Materials Testing Reactor (JMTR) are mostly stainless steel, aluminum (Al) and beryllium (Be). In the decommissioning of JMTR, radioactive miscellaneous solid wastes (waste packages) are produced. The burial criteria require that the drums do not contain any materials that would impair the integrity of the drums, and that the radioactivity of the waste packages does not exceed the amount specified in the criteria. In particular, Al generates hydrogen gas when it reacts with alkaline substances. This can cause voids to form inside the waste package, reducing its strength and increasing the internal pressure, causing the solidifier to overflow. Such a waste package will affect the safe management of the facility. The purpose of this paper was to establish a stabilization treatment technology for Al by applying the Beyer process, and the basic treatment process was established through cold tests. The Al samples were irradiated with neutrons at the Kyoto University Research Reactor (KUR) to investigate the removal characteristics of radionuclides produced by additive and impurity elements in Al by this process. As a result, it was found that Al can be converted to alumina (Al2O3) by this process, and there is a prospect that it can be solidified by cement-based filler as in the usual treatment method for radioactive waste.</p>
Journal
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- Journal of Nuclear Fuel Cycle and Environment
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Journal of Nuclear Fuel Cycle and Environment 29 (1), 2-9, 2022-06-15
Division of Nuclear Fuel Cycle and Environment, Atomic Energy Society of Japan