A detailed simulation study on radionuclide dispersion under spent fuel road transportation conditions: Effects of vessel type and coniferous vegetation growth
文献类型：期刊论文
| 作者 | Chen, Liwei5; Zong, Yiran1; Lu, Tingting2; Zhang, Lu2 ; Cai, Zhikai3; Chen, Chunhua4
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| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
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| 出版日期 | 2024-12-05 |
| 卷号 | 480 |
| 关键词 | Nuclear accident Radionuclide dispersion Computational fluid dynamics Coniferous vegetation barriers |
| ISSN号 | 0304-3894 |
| DOI | 10.1016/j.jhazmat.2024.135397 |
| 通讯作者 | Chen, Chunhua(chunhua.chen@inest.cas.cn) |
| 英文摘要 | Vegetation barriers are an important environmental characteristic of spent fuel road transportation accidents. Spent fuel vessels may be affected by force majeure factors during transportation, which leads to damage to spent fuel assemblies and containers and can cause radionuclides to gradually release from assemblies to vessels to the external environment. In this work, considering the growth periods of coniferous vegetation barriers and vessel type, a radionuclide dispersion model based on computational fluid dynamics (CFD) was established by adding a decay term and a pressure loss term. The simulations showed that, first, compared to the small (Type-II) vessel, the effects of fluid flow around the large vessel (Type-I) have a more significant impact on radionuclide dispersion. The backflow around the Type-I vessel causes leaked radionuclides to disperse towards the vessel, and the larger the vessel is, the more significant the rise of the leaked radionuclide plume tail will be due to the increased negative pressure gradient area. Moreover, the area contaminated exceeding the maximum allowable concentration by radioactivity for the Type-I vessel is reduced gradually with the growth of coniferous vegetation barriers due to the weakening of the backflow effect by growing vegetation. Second, compared to vegetation barriers of 15 years and 23 years, the horizontal distance exceeding the maximum allowable concentration of the leaked I-131 dispersion from Type II vessels near vegetation barriers for 12 years is the longest. The older the vegetation barrier is, the shorter the horizontal dispersion range, and the shape of radionuclide dispersion gradually transforms from flat to semicircular with vegetation barrier growth, but this could cause a greater radioactive accumulation effect near the leakage point, and the maximum concentration of leaked I-131 reached 0.54 kBq center dot m(-3) for leaked radionuclides from the Type II vessel under vegetation barriers of 23 years. In addition, improvement suggestions based on the proposed method are presented, which will enable the Standards Institutes to apply the research methodologies described herein across various scenarios. Environmental Implication: Compared to nonradioative pollutants, radioactive pollutants are intercepted by vegetation barriers and then migrate to the soil through leaves, stems, and roots, which can contaminate the surrounding environment. Considering the effects of vessel type and coniferous vegetation growth, a radionuclide dispersion model based on CFD was established. Suggestions for decontaminating radioactive pollution areas have been proposed based on the simulation results of hypothetical scenarios. The scenario applicability improvements based on the proposed model could assist relevant Standards Institutes to making improving measures. |
| WOS关键词 | ATMOSPHERIC DISPERSION ; AIR-POLLUTION ; DIFFUSION ; ACCIDENT ; TREES |
| 资助项目 | National Natural Science Foundation of China[82104454] ; Outstanding Talent Support Program at the University of Anhui Province[gxyq2022060] ; Open Project of Anhui Intelligent Security Technology Engineering Research Center[2023ZNAJKF06] ; Anhui University of Chinese Medicine 2021 First Batch of High-level Talents Support Program[2021rcyb009] |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001318969700001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; Outstanding Talent Support Program at the University of Anhui Province ; Open Project of Anhui Intelligent Security Technology Engineering Research Center ; Anhui University of Chinese Medicine 2021 First Batch of High-level Talents Support Program |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/135428]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Chen, Chunhua |
| 作者单位 | 1.Hong Kong Baptist Univ, Dept Comp Sci, Hong Kong 999077, Peoples R China 2.Anhui Univ Chinese Med, Key Lab Applicat & Transformat Tradit Chinese Med, Hefei 230012, Anhui, Peoples R China 3.Wuhu Tianjiabing Expt Middle Sch, Wuhu 241006, Peoples R China 4.Chinese Acad Sci, Inst Nucl Energy Safety Technol, Hefei Inst Phys Sci, Hefei 230031, Anhui, Peoples R China 5.Hefei Normal Univ, Sch Comp & Artificial Intelligence, Hefei 230601, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Liwei,Zong, Yiran,Lu, Tingting,et al. A detailed simulation study on radionuclide dispersion under spent fuel road transportation conditions: Effects of vessel type and coniferous vegetation growth[J]. JOURNAL OF HAZARDOUS MATERIALS,2024,480. |
| APA | Chen, Liwei,Zong, Yiran,Lu, Tingting,Zhang, Lu,Cai, Zhikai,&Chen, Chunhua.(2024).A detailed simulation study on radionuclide dispersion under spent fuel road transportation conditions: Effects of vessel type and coniferous vegetation growth.JOURNAL OF HAZARDOUS MATERIALS,480. |
| MLA | Chen, Liwei,et al."A detailed simulation study on radionuclide dispersion under spent fuel road transportation conditions: Effects of vessel type and coniferous vegetation growth".JOURNAL OF HAZARDOUS MATERIALS 480(2024). |
入库方式： OAI收割
来源：合肥物质科学研究院
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