原子能科学技术 ›› 2016, Vol. 50 ›› Issue (7): 1200-1207.DOI: 10.7538/yzk.2016.50.07.1200

• 反应堆工程 • 上一篇    下一篇

TOPAZ-Ⅱ系统启动过程模拟

张文文1,2;陈荣华1,2;田文喜1,2;秋穗正1,2;苏光辉1,2   

  1. 1.西安交通大学 动力工程多相流国家重点实验室，陕西 西安710049;2.西安交通大学 核科学与技术学院，陕西 西安710049
  • 出版日期:2016-07-20 发布日期:2016-07-20

Start-up Simulation of TOPAZ-Ⅱ System

ZHANG Wen-wen1,2;CHEN Rong-hua1,2;TIAN Wen-xi1,2;QIU Sui-zheng1,2;SU Guang-hui1,2   

  1. 1.State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China;2.School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
  • Online:2016-07-20 Published:2016-07-20

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摘要：

对前苏联热离子反应堆电源系统TOPAZ-Ⅱ进行相应的简化，分别建立了堆芯热工水力模型、中子物理学模型以及热排放系统模型。冷却剂回路采用一维热工水力模型，堆芯导热及翅片辐射导热计算采用二维分析模型。选用6组缓发中子点堆模型，考虑了二氧化铀燃料、热离子发电电极、慢化剂与反射层的温度反馈以及控制转鼓对反应性的控制，计算得到TOPAZ-Ⅱ在正常启动工况下的各处温度、功率、反应性反馈等参数的变化。计算结果与TITAM程序的计算结果符合较好，同时本程序可对启动过程进行更为精细的分析，可为控制系统的设计提供参考。

关键词: TOPAZ-Ⅱ系统, 反应堆启动, 辐射器, 数值计算

Abstract:

The thermionic reactor power system TOPAZ-Ⅱ of former Soviet Union was simplified. The core thermal-hydraulic model, neutron physics model and heat rejection system model were established, respectively. One-dimensional thermal-hydraulic model was used to model the coolant circuit. Two-dimensional analysis models for the core heat transfer and the radiator fin heat conduction with radiation were established. The point reactor kinetics equation with six-group delayed neutrons, taking the temperature feedbacks of UO2 fuel, thermionic electrode, moderator and reflector and the control drum reactivity control into account, was applied. The changes of temperature, power and reactivity feedback of TOPAZ-Ⅱ under normal start-up procedure were obtained. The results are in good agreement with the corresponding results of TITAM code. Meanwhile, the developed code can be more precise in analyzing the start-up of TOPAZ-Ⅱ, and provide reference for the design of the control system.

Key words: TOPAZ-Ⅱ system, reactor start-up, radiator, numerical simulation