习蒙蒙　初晓　蔡容

【摘 要】针对一体化压水堆的具体结构，建立合理的系统模型，利用FORTRAN90语言开发了系统稳态计算程序。利用本程序对满功率强迫循环和30%功率自然循环稳态运行工况下的热工水力特性进行了分析，得到了蒸汽发生器套管段一二次侧冷却剂和换热管内温度沿轴向高度的分布，冷却剂及燃料元件温度沿堆芯轴向的分布等结果，并利用RELAP5程序进行验证，证明了本程序的可靠性。本程序可以作为一体化压水堆系统的热工水力方案设计，也可用于系统的运行和安全管理。

【关键字】一体化压水堆;稳态计算;热工水力

中图分类号： TL421.1 文献标识码： A文章编号： 2095-2457（2019）30-0004-004

DOI：10.19694/j.cnki.issn2095-2457.2019.30.002

Development of Steady System Program for Pressurized Water Reactor

XI Meng-meng CHU Xiao CAI Rong

（Science and Technology on Reactor System Design Technology Laboratory， Nuclear Power Institute of China， Chengdu Sichuan 610213， China）

【Abstract】A reasonable system model was established in the paper to develop the steady thermal-hydraulic analysis code for the integral pressurized water reactor， by FORTRAN90 language. Using the steady analysis code， the steady-state thermal-hydraulic characteristics of both forced circulation and natural circulation are presented in this dissertation. The temperature distribution along the axial height of the coolant， steam generator tubes and fuel elements were obtained. At the same time， the simulated results of the steady analysis code were compared with those of RELAP5 and a good agreement was obtained. The steady analysis code provides important theoretical base for the design， operation and security management of integral pressurized water reactor.

【Key words】Integral Pressurized Water Reactor; Steady-state analysis; Thermal-hydraulic

0 前言

一體化压水堆是一座轻水慢化和冷却的具有非能动安全技术的新型压水反应堆。其一回路系统设备，包括堆芯、蒸汽发生器、主泵等，一体化布置于压力容器内，如图1所示。堆芯由下底板支撑，燃料组件由上部组件压紧，堆芯吊篮和上部压紧部件由上部环形弹簧经反应堆压力容器顶盖压紧。一回路流体由主泵驱动自上而下流经蒸汽发生器，然后经下腔室自下而上流经堆芯、上腔室，再进入主泵，由此构成一个循环回路。蒸汽发生器是具有环形间隙的套管型换热器（见图2）。过冷的二回路流体经给水阀进入给水室，流经给水管水平段、下降段后到达蒸汽发生器底部，再转而向上依次流经蒸汽发生器二次侧传热区域、蒸汽管、蒸汽腔室，最后进入汽轮机做功。

本文针对一体化压水堆布置的结构特点，建立合理的系统模型，开发了稳态热工水力计算程序，并计算分析了强迫循环和自然循环下的稳态热工水力特性。……