CFD analysis of iodine mass transfer coupled with a chemical reaction in a filtered containment venting system

IF 3.2 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Progress in Nuclear Energy Pub Date : 2023-12-21 DOI:10.1016/j.pnucene.2023.105012

Muhammad Shummas Humayun , Majid Ali , Muhammad Uzair Qureshi , Muhammad Bilal Khan Niazi , Yan Changqi , Sun Zongning , Gu Hai Feng , Yanmin Zhou

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Abstract

The removal of iodine from flue gases through FCVS during a core meltdown in nuclear reactors is important for environmental safety. In this study, CFD analysis for iodine removal in a venturi scrubber was done on Ansys Fluent using a mathematical model that coupled the mass transfer of iodine with the reaction between iodine and thiosulfate. A user defined function (UDF) was written to couple the mass transfer with the reaction. The UDF was hooked into Ansys Fluent, and the simulation was run for three different gas flow rates. Contours for the mass fraction of iodine, tetrathionate, and iodide, along with the hydrodynamics of the venturi scrubber, were analyzed at different gas flow rates. The mass transfer rate of iodine and its overall removal efficiency were observed to increase at higher gas velocities. The results satisfied the experimental data at a high gas flow rate of 340 m³/h but overpredicted the efficiency at lower flow rates of 240 m³/h and 290 m³/h.

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对过滤安全壳通风系统中与化学反应耦合的碘传质进行 CFD 分析

在核反应堆堆芯熔毁期间，通过 FCVS 去除烟气中的碘对环境安全非常重要。在本研究中，利用将碘的质量传递与碘和硫代硫酸盐之间的反应耦合的数学模型，在 Ansys Fluent 上对文丘里洗涤器中的碘去除进行了 CFD 分析。编写了一个用户自定义函数 (UDF)，将传质与反应结合起来。将 UDF 连接到 Ansys Fluent 中，并对三种不同的气体流速进行模拟。分析了不同气体流速下碘、四硫酸盐和碘化物的质量分数曲线，以及文丘里洗涤器的流体力学。据观察，气体流速越高，碘的质量转移率及其总体去除效率就越高。在 340 立方米/小时的高气体流速下，结果符合实验数据，但在 240 立方米/小时和 290 立方米/小时的较低气体流速下，对效率的预测过高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.