2014 Fiscal Year Final Research Report
Reduction of radioactive contaminated concrete waste by recycling aggregate with the aid of pulsed power discharge
| Project/Area Number |
24310058
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | Kumamoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NAMIHIRA Takao 熊本大学, パルスパワー科学研究所, 准教授 (40315289)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | パルスパワー / 高度骨材再生処理 / 再生骨材 / 除染処理 / 減容処理 / 汚染コンクリート / 放射性廃棄物 / バックエンド |
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| Outline of Final Research Achievements |
An applicability of pulsed power discharge as a decontamination method by separating contaminated matrix from uncontaminated coarse aggregate was examined. In this study, a stable cesium (Cs) isotope was used to simulate radioactively contaminated concrete. As a result, while the volume of reclaimed aggregate from concrete reproduced by the electric pulsed discharge could reach 60%, nevertheless Cs detected in the reclaimed aggregate was only approximately 3% of quantity included in the concrete specimen. Thus most of the Cs was dissolved in water during the discharge process. It is expected that the decontamination method by the pulsed power could reduce the contaminated concrete waste by reusing aggregate. Further, investigations were conducted to test the applicability under the realistic conditions by using the actual radioactive concrete. As a result, no Cs was detected in the reclaimed aggregate from radioactive contaminated concrete. Also no Cs was dissolved in processing water.
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| Free Research Field |
環境建設材料学
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