面向冷却剂温度控制的铅基冷却反应堆热工水力系统传递函数建模方法  

Coolant Temperature Control Oriented Transfer Function Modeling of Lead-based Cooled Fast Reactor Thermal-hydraulic System

作　　者：裴建华[1,2] 汪建业[1] 徐鹏[1] 杨明翰[1] 赵柱民[1] 

机构地区：[1]中国科学院核能安全技术研究所,中子输运理论与辐射安全重点实验室,安徽合肥230031 [2]中国科学技术大学,安徽合肥230027

出　　处：《原子能科学技术》2017年第7期1208-1213,共6页Atomic Energy Science and Technology

基　　金：中国科学院战略性先导科技专项资助项目(XDA03040000)

摘　　要：反应堆瞬态计算程序RELAP5-HD的仿真模型主要采用偏微分方程进行描述,可用于冷却剂温度系统的仿真验证。然而,利用控制理论无法直接对偏微分方程组建立的系统进行稳定性、稳态特性、动态特性分析,从而对冷却剂温度系统的控制器设计缺乏了一种有效的优化手段。为解决上述问题,采用热工水力学第一性原理与空间离散化方法,建立了一套用于分析冷却剂温度系统特性的铅基冷却反应堆热工水力传递函数模型。该模型与RELAP5-HD模型的对比计算结果表明,当控制变量发生阶跃时,传递函数模型与RELAP5-HD模型的输出特性能较好地吻合,准确反映了系统的动力学特性,能够利用控制理论对铅基冷却反应堆冷却剂温度系统的特性进行分析研究。The simulation model built by reactor transient calculation program RELAP5-HD is mainly expressed by partial different equation,which could be applied for the simulation and verification of coolant temperature system.However it is difficult to optimize the controller design of coolant temperature system because the developed control theory could not analyze the stability,steady-state characteristics and dynamic characteristics of the system directly based on partial different equation.In this paper,a transfer function model of lead-based cooled fast reactor thermal-hydraulic system severing for coolant system characteristics analysis was built based on the first principleof thermal-hydraulic and the method of spatial discretization.The contrastive simulation result of the model and RELAP5-HD model indicates that while the control variable step changing,the output characteristic of transfer function model is quite similar to the RELAP5-HD model,reflecting the system dynamic characteristics accurately,and the control theory could be applied in the characteristic analysis study of lead-based cooled fast reactor coolant temperature system.

关 键 词：铅基冷却反应堆 冷却剂温度系统 RELAP5-HD 空间离散化 传递函数模型 

分 类 号：TL365[核科学技术—核技术及应用]