AP1000硼酸配比子系统运行优化研究

Research on Operation Optimization of AP1000 Boric Acid Makeup Subsystem

相较于传统二代核电机组,AP1000机组硼酸配比子系统设计理念先进、系统结构简单,但在实际机组运行过程中,硼偏差报警频繁出现,影响机组安全运行,有必要进一步优化系统运行性能。本研究通过搭建机组运行数据库,挖掘影响回路性能的关键因素。随后,采用Flowmaster软件和RinSim仿真平台建立仿真模型,并通过仿真试验分析各因素的影响机制。结果表明,三通调节阀入口处的除盐水和硼酸压力的相对大小是决定硼酸配比效果的关键因素。此外,减压阀的性能、硼酸箱液位和测量仪表偏差也是重要的影响因素,调节阀和补水泵的影响相对较小。基于分析结果,本研究进一步探讨了系统的运行优化策略,并从短期和长期2个角度提供了优化方案。本研究分析结果和优化方案可为优化机组运行规程或技改提供参考。

Compared with the traditional second-generation unit,the boric acid makeup subsystem of AP1000 unit has advanced design concept and simple system structure.However,in the actual operation and maintenance process of the unit,boron deviation alarms frequently occur,which affects the safe operation of the unit.It is necessary to further optimize the system's operational performance.This study aims to identify the key factors that influence the performance of the subsystem by constructing a comprehensive database of unit operations.Subsequently,simulation models are established using Flowmaster and RinSim software,and the impact mechanisms of various factors are analyzed through simulation experiments.The results show that the relative pressure of demineralized water and boric acid at the inlet of the three-way valve is the key factor to determine the effectiveness of the boron concentration control.Additionally,the performance of pressure relief valve,boron tank liquid level,and measurement instrument deviation are also important influencing factors,while the effects of regulating valve and makeup water pump are relatively small.Based on the analysis results,this study further explores operational optimization strategies for the system and provides optimization schemes from both short-term and long-term perspectives.The analysis results and optimization schemes of this study can provide reference for optimizing unit operation regulations or technical transformation.