Investigation of the Outflow and Spreading-Solidification Behaviour of Stratified Molten Metal
| العنوان: | Investigation of the Outflow and Spreading-Solidification Behaviour of Stratified Molten Metal |
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| المؤلفون: | Koji Okamoto, Masaru Harada, Shunichi Suzuki, Ryo Yokoyama, Masahiro Kondo |
| المصدر: | Journal of Nuclear Engineering Volume 2 Issue 2 Pages 17-189 Journal of Nuclear Engineering, Vol 2, Iss 17, Pp 168-189 (2021) |
| بيانات النشر: | Multidisciplinary Digital Publishing Institute, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Materials science, 020209 energy, Molten metal, TK9001-9401, Stratification (water), Particle method, 02 engineering and technology, Mechanics, 01 natural sciences, Debris, 010305 fluids & plasmas, severe accident, Fukushima daiichi, fuel debris, stratification, decommissioning, particle method, Fukushima Daiichi nuclear power plants, molten metal spreading, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Nuclear engineering. Atomic power, Outflow, Material distribution, Density ratio |
| الوصف: | The spreading-solidification behaviour of the stratified molten metals was investigated. This is important in understanding the practical fuel debris distribution spread and solidified in the primary containment vessel (PCV) of Fukushima Daiichi Nuclear Power Plants (1F NPPs). In this study, the effect of outflow diameter on the material distribution before discharging was studied both experimentally and numerically. The two simulant metals were chosen so that the density ratio could be similar to the practical fuel and structure elements of the plant. They were arranged in a vessel and discharged on a receiving plate. The spreading experiments were performed using various outlet diameters with a density and reverse density stratification arrangement. After the experiment, X-ray analysis was performed to evaluate the material distribution in the solidified material. Moreover, a numerical analysis was performed to reveal the mechanisms that affect the material distribution after solidification. As a result, the low-density metal accumulated at the centre region regardless of the outlet diameters in the density stratification. In contrast, the outlet diameters affected the material distribution in the reverse density stratification because they affected the material outflow order. These findings may help increase our understanding of the fuel debris distribution in 1F NPPs. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2673-4362 |
| DOI: | 10.3390/jne2020017 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbfde690704dc8d7fdaed5ed3a54027fTest |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....bbfde690704dc8d7fdaed5ed3a54027f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 26734362 |
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| DOI: | 10.3390/jne2020017 |