1 GWt PB-FHR负荷跟踪运行特性分析

为研究熔盐堆系统在商业应用中的价值，分析其是否满足电网负荷的变化需求和安全运行的能力，本文以1 GWt球床式氟盐冷却高温堆（PB-FHR）为研究对象，仿真计算其在负荷跟踪模式下的瞬态行为和运行特性。以RELAP5/MOD4.0程序为研究工具，并植入相关的熔盐物性与计算关系式，建立氟盐冷却高温堆的热工水力系统与功率控制系统的仿真模型，对典型负荷工况参数变化情况下控制系统的响应特性进行仿真分析。结果表明：该氟盐冷却高温堆系统在设计的控制逻辑的调控下，展示出良好的负荷跟踪运行能力，堆芯功率能迅速响应负荷变化，功率超调和温度超调小，反应堆的运行参数始终处于合理的运行范围内。

Characteristic Analysis of 1 GWt PB-FHR in Load Following Operation

In order to study the value of molten salt reactor system in commercial application and analyze whether it can meet the changing demand of power grid load and the ability of safe operation, the 1 GWt pebble-bed fluoride salt-cooled high temperature reactor (PB-FHR) was taken as the research object. The performance of the control system under the condition of changing the parameters of typical load following conditions was simulated and analyzed. The simulation model of thermal hydraulic system and power control system of FHR was established with RELAP5/MOD4.0 program, implanted with the properties of molten salt and calculation formulas. The performance of the control system under the condition of changing parameters of typical load following conditions was simulated and analyzed. Results from simulations show that the FHR has a good load following ability. Under the designed control logic, the reactor power can respond to the load change rapidly with low power overshoot and temperature overshoot, and the operation parameters of the reactor are always within a reasonable operating range.