2023年5月21-26日

原子力国際専攻岡本研究室 姚 维一さん （D２） が、「第30回原子力工学国際会議（ICONE30）」においてBest Poster Awardを受賞されました。

＜受賞した賞の名称と簡単な説明＞

Best Poster Award

The 30th International Conference on Nuclear Engineering (ICONE30) held in Kyoto, Japan on May 21-26, 2023, presented the “Best Poster Award” to the researches for their outstanding and high-quality posters presented at the track of student paper competition in ICONE30.

〈About awarded research〉

During the decommissioning of the Fukushima Daiichi Nuclear Power Plant (NPP), the radioactive aerosols generated by the crushing works such as laser cutting and drilling fuel debris. Severe accidents in NPP also release the fission products (FP) in the form of aerosols into the containment. In boiling water reactor (BWR), the gas containing small aerosol particles is transported into the suppression chamber (S/C) and with the removal effect called pool scrubbing, the aerosols are trapped from the gas to the liquid. Due to the complex phenomena during the pool scrubbing, many assumptions and empirical formula of the thermal-hydraulics and aerosol physics are applied in the severe accident codes. The validation of prediction performance of these codes is crucial to the establishing the benchmark of the source term calculation. A number of experimental studies have been conducted before to evaluate the affecting factors such as the submergence, gas flow rate, particle diameter. In this paper, the code modelling of SPARC-90 in MECLOR is reviewed and a comparison on the decontamination factor between the calculation results of code and the experimental data without steam is discussed. The limitations of the MELCOR estimation are pointed out and the suggestions on modification and improvement of the pool scrubbing model in severe accident code are given.

〈Your impression & future plan〉

It is my pleasure and honor to win this award in strong competition with other outstanding students from all over the world. I would like to express my gratitude to my supervisors Prof. Pellegrini and Prof. Okamoto, who provides me with very important guidance, support, and encouragement during my research. Winning the “Best Poster Award” was an amazing and humbling experience. I felt so happy and accomplished for all the effort I put into my research poster. In the future, I will continue my research on improvement of evaluation of removal efficiency of aerosols in the process of pool scrubbing with great passion.