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Report No.

Development of error reduction methods in aerosol measurement for pool scrubbing experiment

Sun, Haomin  ; Shibamoto, Yasuteru ; Okagaki, Yuria  ; Yonomoto, Taisuke 

Pool scrubbing is one of the effective mechanisms to filter out radioactive aerosols in a severe accident of a nuclear reactor. A lot of work has been done on the pool scrubbing models and experiments. However, large discrepancies still exist between the simulation and experimental results. To improve the pool scrubbing model, an accurate decontamination factor (DF) evaluation by an aerosol measurement is inevitable. A pool scrubbing experimental apparatus was constructed. The aerosol particle diameter distribution was measured by a light scattering aerosol spectrometer. We focused on investigating and reducing the error of DF experimentally. Several problems resulting in the error and their solutions for the error reduction were summarized in this paper. Based on the error reduction methods, the DFs of pool scrubbing were measured in two water submergences.



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