Host: The Japan Society of Mechanical Engineers
Name : The 30th International Conference on Nuclear Engineering (ICONE30)
Date : May 21, 2023 - May 26, 2023
In decommissioning a nuclear power plant, radioactively contaminated metal structures must be dismantled and cut to a disposable size. When cutting NPPs structures, functional methods for cutting objects need to determine. The thermal cutting method is mainly used because of its high cutting speed compared to other cutting methods. In previous research, the distribution of aerosols generated during thermal cutting shows a high concentration in the range of 1 ㎛ or less. The effect of fine particles(1 ㎛ or less) with high concentrations should be prevented for workers' safety. In this study, Aerosol distribution in real-time measures verified the characteristics of the aerosol generated during cutting. Metal cutting used plasma arc, and flame-cutting methods. The aerodynamic diameter distribution of generated aerosols during the cutting process was measured using high-resolution aerosol measuring equipment in real time. This study analyzed the changes in the generation of real-time aerosols by the cutting method. And It was confirmed that there was a difference in the distribution of aerosol diameters generated during cutting and post-cutting. The results show distribution characteristics through high-resolution aerosol measurements.
