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A one-dimensional code of double-coupled passive residual heat removal system for the swimming pool-type low-temperature heating reactor
Nuclear Engineering and Design ( IF 1.9 ) Pub Date : 2021-01-27 , DOI: 10.1016/j.nucengdes.2021.111070
Junxiu Xu , Xibin Xie , Ming Ding , Changqi Yan , Guangming Fan

In Swimming Pool-type Low-Temperature Heating Reactor (SPLTHR), the Passive Residual Heat Removal System (PRHRS) is an indispensable part of the reactor safety system. In the heat transfer process of the PRHRS system, the natural convection heat transfer outside the Passive Residual Heat Removal Heat Exchanger (PRHR HX) in the reactor pool has a great influence on the flow and heat transfer characteristics of the system. In this study, an experimental facility was built to study the natural convection heat transfer outside the tube bundle under low temperature difference. According to the experimental results, a PRHRS for SPLTHR was designed. And a double-coupled natural circulation system analysis code was developed to investigate the start-up characteristics of the system under different initial conditions. The research results showed that the correlation of Yang predicts the experimental heat transfer results well. The calculation results indicated that the designed system met the heat removal requirements after reactor shutdown. If the temperature in the pipeline between the Passive Residual Heat Removal Heat Exchanger (PRHR HX) and the air-cooler was linearly distributed, the system would quickly establish a natural circulation and reduced the number of oscillations before the system reached stability. At the air-cooler, when the temperature of the heat transfer fluid in the water side changed, the temperature and mass flow rate of the air loop would quickly follow the change. The designed system and calculation results can provide a design basis for engineering applications.



中文翻译:

游泳池式低温加热反应堆双耦合被动余热去除系统的一维规范

在游泳池型低温加热反应堆(SPLTHR)中,被动余热排除系统(PRHRS)是反应堆安全系统必不可少的部分。在PRHRS系统的传热过程中,反应堆池中被动余热排出热交换器(PRHR HX)外部的自然对流传热对系统的流量和传热特性有很大影响。在这项研究中,建立了一个实验设施来研究在低温差下管束外部的自然对流传热。根据实验结果,设计了用于SPLTHR的PRHRS。并开发了双耦合自然循环系统分析代码,以研究该系统在不同初始条件下的启动特性。研究结果表明,杨的相关性很好地预测了实验的传热结果。计算结果表明,所设计的系统满足反应堆停机后的排热要求。如果被动余热排出热交换器(PRHR HX)和空气冷却器之间的管道温度呈线性分布,则系统将迅速建立自然循环并减少振荡次数,直到系统达到稳定状态。在空气冷却器中,当水侧传热流体的温度发生变化时,空气回路的温度和质量流率将迅速跟随变化。设计的系统和计算结果可为工程应用提供设计依据。计算结果表明,所设计的系统满足反应堆停机后的排热要求。如果被动余热排出热交换器(PRHR HX)和空气冷却器之间的管道温度呈线性分布,则系统将迅速建立自然循环并减少振荡次数,直到系统达到稳定状态。在空气冷却器中,当水侧传热流体的温度发生变化时,空气回路的温度和质量流率将迅速跟随变化。设计的系统和计算结果可为工程应用提供设计依据。计算结果表明,所设计的系统满足反应堆停机后的排热要求。如果被动余热排出热交换器(PRHR HX)和空气冷却器之间的管道温度呈线性分布,则系统将迅速建立自然循环并减少振荡次数,直到系统达到稳定状态。在空气冷却器中,当水侧传热流体的温度发生变化时,空气回路的温度和质量流率将迅速跟随变化。设计的系统和计算结果可为工程应用提供设计依据。如果被动余热排出热交换器(PRHR HX)和空气冷却器之间的管道温度呈线性分布,则系统将迅速建立自然循环并减少振荡次数,直到系统达到稳定状态。在空气冷却器中,当水侧传热流体的温度发生变化时,空气回路的温度和质量流率将迅速跟随变化。设计的系统和计算结果可为工程应用提供设计依据。如果被动余热排出热交换器(PRHR HX)和空气冷却器之间的管道温度呈线性分布,则系统将迅速建立自然循环并减少振荡次数,直到系统达到稳定状态。在空气冷却器中,当水侧传热流体的温度发生变化时,空气回路的温度和质量流率将迅速跟随变化。设计的系统和计算结果可为工程应用提供设计依据。当水侧传热流体的温度发生变化时,空气回路的温度和质量流率将迅速跟随变化。设计的系统和计算结果可为工程应用提供设计依据。当水侧传热流体的温度发生变化时,空气回路的温度和质量流率将迅速跟随变化。设计的系统和计算结果可为工程应用提供设计依据。

更新日期:2021-01-28
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