核电厂内部水淹分析中门缝流量建模的修正

Model Modification of Flow Through the Gap Under Door in Internal Flooding Analysis of NPP

IFA程序是用于核电厂内部水淹分析的主要计算程序。本文介绍了修正后IFA程序中门缝流量的物理和数学模型，并着重对数学模型中两个关键变量的取值和其中两个物理模型进行了详细论证，证明了修正后的IFA程序对门缝流量的计算是合理的，能够应用于工程实践。

IFA code is a useful calculation code in the internal flooding analysis of NPP. This paper introduced the modified physical and math models of flow through the gap under door, described two important parameters in the models in detail and verified two types of physical models. It is demonstrated that the calculated results of the modified IFA code are reasonable and the code can be used in engineering practice.