基于无量纲准则数的整体效应试验数据适用性验证方法探究  

Research on Verification Methodology of Applicability of Integral Effect Test Data Based on Dimensionless Criterion Numbers

作　　者：张雪艳 邓程程 朱东来 陈伟[2] 丁书华[2] 杨军 Zhang Xueyan;Deng Chengcheng;Zhu Donglai;Chen Wei;Ding Shuhua;Yang Jun(Department of Nuclear Engeneering and Technology,Science and Technology of Huazhong University,Wuhan,430074,China;Nuclear Power Institute of China,Chengdu,610213,China;Research Institute of Nuclear Power Operation,Wuhan,430073,China)

机构地区：[1]华中科技大学能源与动力工程学院核工程与核技术系,武汉430074 [2]中国核动力研究设计院,成都610213 [3]核动力运行研究所,武汉430073

出　　处：《核动力工程》2022年第1期64-71,共8页Nuclear Power Engineering

基　　金：国家自然科学基金(0214120048);华中科技大学自主创新研究基金(5003120076)。

摘　　要：在进行核反应堆与核动力装置安全性评估的过程中,一般需要基于相似比例法则建立整体效应试验(IET)或分离效应实验(SET)台架,为安全性能验证与评估提供数据支撑。作为衡量比例相似程度的重要参数,无量纲准则数可以对特定物理现象做出独立于台架特性、装置尺寸等的表征,因此可以用于比例设计的合理性验证以及实验数据的适用性评估。对无量纲数的跨台架应用可以避免过量重复性实验,也可辅助评估单一台架未能准确复现的某个物理现象。为了探索无量纲数在比例分析和实验数据适用性评估中的应用方法和原则,本文针对传统压水堆的小破口失水事故(SBLOCA),基于RELAP5数值模拟结果,使用自上而下的比例分析方法对整体效应试验台架LOFT和LOBI进行无量纲参数计算和数据对比。分析结果表明,与破口质量流出、堆芯衰变热、一回路压力等重要现象和参数相关的无量纲数跨台架吻合较好;而与回路摩擦阻力、回路浮升力等相关的无量纲数比率有较大失真。本文采用的无量纲分析方法预期可用于同类型试验台架的实验数据互验,并为新堆型的开发和验证提供参考。In the process of evaluating the safety of nuclear reactors and nuclear power plants,it is generally necessary to establish integral effect test or separate effect test bench based on the similar scaling laws to provide data support for safety performance verification and evaluation. As important parameters to measure the degree of similarity of scaling, dimensionless criterion numbers can characterize specific physical phenomena independent of the bench characteristics and the device size. Therefore, they can be used to verify the rationality of scaling design and evaluate the applicability of experimental data. The cross-bench application of dimensionless numbers can not only avoid excessive repetitive experiments, but also assist in the evaluation of a physical phenomenon that can not be accurately reproduced by a single bench. In order to explore the application methods and principles of dimensionless numbers in scaling analysis and applicability evaluation of experimental data, in this paper, aiming at SBLOCA of the traditional PWR, based on the numerical simulation results of RELAP5, the top-down scaling analysis method is used to calculate the dimensionless parameters and compare the data of the integral effect test bench LOFT and LOBI. The analysis results show that the dimensionless numbers related to important phenomena and parameters such as break mass outflow, core decay heat and primary circuit pressure are in good agreement with the bench;the dimensionless number ratios related to loop friction resistance and loop buoyancy have great distortion. The dimensionless analysis method used in this paper is expected to be used for mutual verification of experimental data on the same type of test bench, and to provide a reference for the development and verification of new reactor types.

关 键 词：无量纲分析 压水堆(PWR) LOFT LOBI 小破口失水事故(SBLOCA) RELAP5 

分 类 号：TL334[核科学技术—核技术及应用]