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首页> 外文期刊>Annals of nuclear energy >Decontamination of concrete waste from nuclear power plant decommissioning in South Korea
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Decontamination of concrete waste from nuclear power plant decommissioning in South Korea

机译：韩国核电厂退役混凝土废物的净化

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摘要

This study investigates for optimizing thermal treatment conditions for the effective decontamination of cobalt(Co)-contaminated concrete waste. About 21 g of ordinary Portland cement (OPC, Type I), 37 g of dry sand, 5 g of fly ash, and 24 g of aggregates were mixed, cured for 28 days, and used for characterization and thermal treatment. Thermal treatment was conducted at different temperatures between 105 degrees C and 600 degrees C. The samples were characterized using SEM, XRD, FTIR, XRF, and XAS. Up to 600 degrees C, mass loss only occurred for water molecules in the concrete with similar to 60% volume reduction, suggesting an optimum temperature between 500 degrees C and 550 degrees C. During thermal treatment, Co phase changed from Co3O4 to CoO, and among the various chemical solutions, chloric acid exhibits the highest Co decontamination efficiency. The results suggest that a combination of thermal and chemical treatments can enhance Co removal from concrete waste. (C) 2020 Elsevier Ltd. All rights reserved.
机译：本研究研究了优化钴（CO）混凝土垃圾的有效净化的热处理条件。混合了大约21克普通的普通波特兰水泥（OPC，I型），37克干粉，5g粉煤灰和24克骨料，固化28天，用于表征和热处理。热处理在105℃和600℃之间的不同温度下进行。使用SEM，XRD，FTIR，XRF和XA来表征样品。高达600℃，仅用于混凝土中的水分子的质量损失，其体积减少60％，表明在热处理期间，在热处理期间，在热处理期间，从CO3O4转变为COO和在各种化学溶液中，氯酸表现出最高的CO去污效率。结果表明，热和化学处理的组合可以增强混凝土废物中的CO去除。 （c）2020 elestvier有限公司保留所有权利。

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  • 来源
    《Annals of nuclear energy》 |2020年第12期|107795.1-107795.8|共8页
  • 作者

    Han Sangsoo; Hong Seokju; Nam Seongsik; Kim Won-Seok; Um Wooyong;

  • 作者单位

    Pohang Univ Sci & Technol POSTECH Div Adv Nucl Engn DANE 77 Chongam Ro Pohang 37673 South Korea;

    Pohang Univ Sci & Technol POSTECH Div Adv Nucl Engn DANE 77 Chongam Ro Pohang 37673 South Korea;

    Pohang Univ Sci & Technol POSTECH Div Adv Nucl Engn DANE 77 Chongam Ro Pohang 37673 South Korea;

    Pohang Univ Sci & Technol POSTECH Div Adv Nucl Engn DANE 77 Chongam Ro Pohang 37673 South Korea;

    Pohang Univ Sci & Technol POSTECH Div Adv Nucl Engn DANE 77 Chongam Ro Pohang 37673 South Korea|Pohang Univ Sci & Technol POSTECH Div Environm Sci & Engn DESE 77 Chongam Ro Pohang 37673 South Korea|Pohang Univ Sci & Technol POSTECH Nucl Environm Technol Inst NETI Pohang 37673 Gyeongbuk South Korea;

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  • 正文语种 eng
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  • 关键词

    Decommissioning; Radioactive concrete; Concrete decontamination; Thermal treatment;

    机译：退役;放射性混凝土;混凝土净化;热处理;

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