Experimental study on polydisperse aerosol removal under multi-parameter spray conditions in containment

IF 3.2 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY Progress in Nuclear Energy Pub Date : 2025-02-09 DOI:10.1016/j.pnucene.2025.105660

Jiaxuan Tang , Zhuo Liu , Luteng Zhang , Jialong Li , Yang Yang , Liangming Pan , Li Gao , Yidan Yuan

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Abstract

After LOCA and SGTR accidents in pressurized water reactors, the containment spray system plays a crucial role in mitigating the release of radioactive aerosols suspended in the containment atmosphere. However, for submicron particles with diameters in the range of 0.1–1 μm, the spray removal mechanism exhibits significantly lower collection efficiencies. Investigating the effects of spray characteristics on the minimum attenuation particle size of various submicron aerosol species under severe accident conditions is crucial for effective severe accident management. Based on the Facility for Aerosol Behavior and Containment Spray (FABCS), an experimental study was conducted on polydisperse, multi-species submicron aerosol particles. The results showed that the minimum attenuation particle size for submicron aerosols ranged from 0.2 to 0.5 μm and decreased with higher spray flow rates. For multi-component aerosols, this size varied with the count median diameter. Increased spray droplet velocity and smaller droplet size raised Stokes numbers, enhancing inertial impaction. Higher gas-phase temperatures increased the aerosol removal rate due to thermophoresis. This study offers crucial data for predicting the minimum attenuation particle size of multicomponent submicron aerosols, aiding severe accident management.

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容器内多参数喷雾条件下多分散气溶胶去除实验研究

在压水堆发生LOCA和SGTR事故后，安全壳喷雾系统在减缓悬浮在安全壳大气中的放射性气溶胶的释放方面起着至关重要的作用。然而，对于直径为0.1-1 μm的亚微米颗粒，喷雾去除机制的收集效率显著降低。研究严重事故条件下不同亚微米气溶胶的雾化特性对其最小衰减粒径的影响，对于有效管理严重事故至关重要。基于气溶胶行为与密闭喷雾装置（FABCS），对多分散、多组分的亚微米气溶胶粒子进行了实验研究。结果表明：亚微米气溶胶的最小衰减粒径在0.2 ~ 0.5 μm之间，随着喷雾流量的增大而减小；对于多组分气溶胶，其大小随计数中值直径的变化而变化。增加喷雾液滴速度和减小液滴尺寸提高了斯托克斯数，增强了惯性冲击。由于热泳术，气相温度的升高提高了气溶胶的去除率。该研究为预测多组分亚微米气溶胶的最小衰减粒径提供了重要数据，有助于重大事故的管理。

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来源期刊

Progress in Nuclear Energy 工程技术-核科学技术

CiteScore

5.30

自引率

14.80%

发文量

331

审稿时长

3.5 months

期刊介绍： Progress in Nuclear Energy is an international review journal covering all aspects of nuclear science and engineering. In keeping with the maturity of nuclear power, articles on safety, siting and environmental problems are encouraged, as are those associated with economics and fuel management. However, basic physics and engineering will remain an important aspect of the editorial policy. Articles published are either of a review nature or present new material in more depth. They are aimed at researchers and technically-oriented managers working in the nuclear energy field. Please note the following: 1) PNE seeks high quality research papers which are medium to long in length. Short research papers should be submitted to the journal Annals in Nuclear Energy. 2) PNE reserves the right to reject papers which are based solely on routine application of computer codes used to produce reactor designs or explain existing reactor phenomena. Such papers, although worthy, are best left as laboratory reports whereas Progress in Nuclear Energy seeks papers of originality, which are archival in nature, in the fields of mathematical and experimental nuclear technology, including fission, fusion (blanket physics, radiation damage), safety, materials aspects, economics, etc. 3) Review papers, which may occasionally be invited, are particularly sought by the journal in these fields.