最佳估算系统代码和安全壳分析代码的耦合及其在 TMLB 事故中的应用

IF 2.6 4区 工程技术 Q3 ENERGY & FUELS Frontiers in Energy Research Pub Date : 2024-07-30 DOI:10.3389/fenrg.2024.1436245
Xiaoli Wu, Zhifeng Zheng, Jian Deng, Yu Liu, Qi Lu, Qingan Xiang, Chong Chen, Hongping Sun, Yazhe Lu, Danhong Shen, Wei Li
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引用次数: 0

摘要

随着先进压水堆技术的发展,安全壳与一次系统之间的热液耦合效应越来越紧密。为了满足安全壳与一次系统之间综合安全分析的需求,本文研究了最佳估计系统代码先进反应堆安全分析代码与安全壳分析程序 ATHROC(安全壳热液压响应分析)之间的直接耦合方法。通过马维肯两相流释放实验,证明了这种直接耦合方法的可行性以及耦合程序在整体安全分析中的适用性。ATHROC/ARSAC 耦合程序用于分析 CPR1000 核电站增压器的泄压功能对 TMLB 事故期间主系统和安全壳行为的影响。计算结果表明,这些措施可以将主系统的压力降至低压注入系统可接受的水平,但同时会导致安全壳内的压力上升至近 0.4 兆帕。因此,为确保安全壳的结构完整性,非被动氢气重组器必须有效降低氢气浓度,从而避免因氢气爆燃导致安全壳内压力进一步升高,从而导致超压失效。该研究结果对于提高运行中的第二代和先进的第三代压水堆核电站热液压系统的安全性能具有重要的参考价值。
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Coupling of the best-estimate system code and containment analysis code and its application to TMLB’ accident
With the development of advanced pressurized water reactor technology, the thermal-hydraulic coupling effect between the containment and the primary system becomes increasingly tight. In order to meet the demand for integrated safety analysis between the containment and the primary system, this paper investigates a direct coupling method between the best-estimate system code Advanced Reactor Safety Analysis Code and the containment analysis program ATHROC (Analysis of Thermal Hydraulic Response Of Containment). The feasibility of this direct coupling method and the applicability of the coupled program for overall safety analysis are demonstrated using Marviken two-phase flow release experiments. The ATHROC/ARSAC coupled program is employed to analyze the impact of the pressure relief function of the CPR1000 nuclear power plant pressurizer on the behavior of the primary system and containment during the TMLB’ accident. The calculation results indicate that these measures can reduce the pressure of the primary system to the level acceptable by the low-pressure injection system, but at the same time, they cause the pressure in the containment to rise to nearly 0.4 MPa. Therefore, to ensure the structural integrity of the containment, it is necessary for the non-passive hydrogen recombiner to effectively reduce the hydrogen concentration, thereby avoiding additional pressure increase in the containment due to hydrogen deflagration, which could lead to overpressure failure. The findings of this study are of significant reference value for improving the safety performance of thermal-hydraulic systems in operational Gen-II and advanced Gen-III pressurized water reactor nuclear power plants.
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来源期刊
Frontiers in Energy Research
Frontiers in Energy Research Economics, Econometrics and Finance-Economics and Econometrics
CiteScore
3.90
自引率
11.80%
发文量
1727
审稿时长
12 weeks
期刊介绍: Frontiers in Energy Research makes use of the unique Frontiers platform for open-access publishing and research networking for scientists, which provides an equal opportunity to seek, share and create knowledge. The mission of Frontiers is to place publishing back in the hands of working scientists and to promote an interactive, fair, and efficient review process. Articles are peer-reviewed according to the Frontiers review guidelines, which evaluate manuscripts on objective editorial criteria
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