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首页> 外文会议>International topical meeting on nuclear thermal hydraulics, operations and safety;NUTHOS-5 >3D thermal-hydraulic analysis on core of pwr nuclear power station
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3D thermal-hydraulic analysis on core of pwr nuclear power station

机译：压水堆核电站堆芯的3D热工水力分析

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Thermal hydraulic analysis of core is of great importance in reactor safety analysis. A computer code, thermal hydraulci analysis porous medium analysis (THAPMA), has been developed to simulate the flow and heat transfer characteristics of reactor components. It has been proved reliable by several numerical tests. In the THAPMA code, a new difference scheme and solution method have been studied in developing the computer software. for the difference scheme, a second order accurate, high resolution scheme, called WSUC scheme, has been proposed. This scheme is total variation bounded and unconditionally stable in convective numeral stability. Numerical tests show that the WSUC is better in accuracy and resolution than the 1-st order upwind, 2-nd order upwind, SOUCUP by Zhu and rodi. In solution mehtod, a modified PISO algorithm is used, which is not only simpler but also more accurate and more rapid in convergence than the original PISO algorithm. Moreover, the modified PISO algorithm can effectively solve steady and transient state problem. Besides, with the THAPMA code, the flow and heat transfer phenomena in reactor core have been numerically simulated in the light of the design condition of Qinshan PWR nuclear pwoer station (the second-term project). The simulation results supply a theoretical basis for the core design.
机译：堆芯的热工水力分析在反应堆安全分析中非常重要。已经开发了计算机程序热水力分析多孔介质分析（THAPMA），以模拟反应堆组件的流动和传热特性。通过数个数值测试已证明它是可靠的。在THAPMA代码中，已经在开发计算机软件中研究了一种新的差异方案和解决方法。对于差分方案，已经提出了一种称为WSUC方案的二阶准确，高分辨率方案。该方案是总变化有界的，对流数值稳定性是无条件稳定的。数值试验表明，WSUC的精度和分辨率优于一阶逆风，二阶逆风，朱和罗迪的SOUCUP。在解决方案方法中，使用了改进的PISO算法，它比原始PISO算法不仅更简单，而且更准确，收敛速度更快。此外，改进的PISO算法可以有效地解决稳态和瞬态问题。此外，利用THAPMA程序，根据秦山压水堆核电站（二期工程）的设计条件，对反应堆堆芯内的流动和传热现象进行了数值模拟。仿真结果为核心设计提供了理论依据。

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