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Research and application of an in-service chemical decontamination process for high temperature and high pressure circuit

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Abstract

Here we present a newly developed two-step oxidative-reductive in-service chemical decontamination process suitable for high temperature and high pressure circuit (HTHPC) decontamination in a pressurized water reactor (PWR). Various process parameters on the corrosion depth and decontamination factor were investigated by employing different kinds of detergents. Under optimal conditions, the average decontamination factor is about 60.0 and the maximum corrosion depth is 0.20 um. Actual decontamination by applying this process to HTHPC, the dose field in most locations decreased by more than 89% and it’s proved that the decontamination process is completely suitable for the decontamination of PWRs in service.

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Acknowledgements

The authors gratefully acknowledge the support of the radiochemistry laboratory who funded this work, and also acknowledge the helpful comments of other colleagues in the laboratory. The radiochemistry laboratory affiliated to Nuclear Power Institute of China carried out frontier basic and applied research on the key radiochemical problems of radionuclide separation, decommissioning and treatment of three wastes.

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Authors and Affiliations

  1. Nuclear Power Institute of China, Chengdu, 610065, Sichuan, People’s Republic of China

    Shuang Dai, Siyan Wang, Xinzhen Li, Yong Liu, Changqing Teng, Yunming Chen & Qi Cao

  2. Sichuan Engineering Laboratory for Nuclear Facilities Decommissioning and Radwaste Management, Chengdu, 610041, Sichuan, People’s Republic of China

    Shuang Dai, Siyan Wang, Xinzhen Li, Yong Liu, Yunming Chen & Qi Cao

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  1. Shuang Dai
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Dai, S., Wang, S., Li, X. et al. Research and application of an in-service chemical decontamination process for high temperature and high pressure circuit. J Radioanal Nucl Chem 330, 253–266 (2021). https://doi.org/10.1007/s10967-021-07946-y

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