The development and verification of thermal-hydraulic code on passive residual heat removal system of Chinese advanced PWR

The technology of passive safety is the current trend among safety systems in nuclear power plant. Pas- sive residual heat removal system (PRHRS), a major part of passive safety systems of Chinese advanced PWR, is a novel design with three-fold natural circulation. On the basis of reasonable physics and mathematics models, MI- TAP-PRHRS code was developed to analyze steady and transient characteristics of the PRHRS. The calculation and analysis show that the code simulates steady characteristics of the PRHRS very well, and it is able to simulate tran- sient characteristics of all startup modes of the PRHRS. However, the quantitative description is poor during the ini- tial stages of the transition process when water hammer occurs.

先进堆非能动余热排出系统MISAP程序验证分析

本文介绍了先进堆非能动余热排出系统专用程序MISAP2.0的理论模型及验证分析结果。结果表明:目前MISAP2.0程序已具备了基本的系统、设备模型,也能基本正确了计算典型物理过程,建议在MISAP2.0程序现有的基础上,增加一回路系统模块,并在应急给水箱模型和空气冷却器模型中增加蒸汽与过冷水接触的界面冷凝模型。经过进一步的试验评估验证后,该程序可以用于先进堆非能动余热排出系统原型和试验装置的设计和分析。