Reduction of contaminated concrete waste by recycling aggregate with the aid of pulsed power discharge
Reduction of contaminated concrete waste by recycling aggregate with the aid of pulsed power discharge
复制标题
借助脉冲功率放电回收骨料，减少受污染的混凝土废物
DOI：
10.1016/j.conbuildmat.2014.06.001
复制
发表时间：
2014
影响因子：
7.4
通讯作者：
Mitsuhiro Shigeishi
中科院分区：
文献类型：
--
作者：
Eva Arifi;Koichi Ishimatsu;Shinya Iizasa;Takao Namihira;Hiroyuki Sakamoto;Yukio Tachi;Hiroyasu Kato;Mitsuhiro Shigeishi
福岛第一核电站事故导致大量混凝土受到放射性污染。本研究的目的是研究脉冲功率放电的可能应用，以减少作为放射性废物的受污染混凝土的数量。研究了脉冲功率放电作为一种净化方法的适用性，该方法可将受污染的基质与未受污染的粗骨料分离。在这项研究中，使用稳定的铯 (Cs) 同位素来模拟受放射性污染的混凝土。结果，虽然通过电脉冲放电再现的放射性污染混凝土的再生骨料体积可以达到60％，但在再生骨料中检测到的Cs仅占混凝土试件中所含数量的约3％。因此，在放电过程中，大部分Cs溶解在水中。预计脉冲功率去污方法可以通过骨料的再利用来减少受污染的混凝土废物。需要进一步研究以测试该方法在接近实际废物的现实条件下的适用性。
The Fukushima Dai-ichi Nuclear Power Plant accident has resulted in a large amount of radioactively contaminated concrete. The aim of this study is to investigate the possible application of the pulsed power discharge to reduce the amount of contaminated concrete as radioactive waste. 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 radioactive contaminated 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 are requested to test the applicability of this method under the realistic conditions close to the actual waste.