摘要
为解决压水堆核电厂离线式硼表(OFBM)测量的核岛一回路冷却剂总硼浓度相对化学滴定硼浓度的偏差超标问题,对OFBM的硼浓度算法进行了分析,并对硼浓度偏差的影响因素和产生的原因进行了分析。分析结果表明:硼浓度偏差的主要影响因素是核岛一回路冷却剂中的10B浓度和10B丰度;OFBM硼浓度算法忽略了核岛一回路冷却剂的10B丰度变化是造成硼浓度偏差的主要原因。同时设计了一种能够跟踪核岛一回路冷却剂10B丰度的新硼浓度算法,新算法实现了10B浓度计算功能。最后建立了新硼浓度算法的仿真模型,并基于2台M310核电机组OFBM的标定数据对新硼浓度算法的计算准确度进行了验证,仿真结果表明,新硼浓度算法的计算准确度满足OFBM设计规格要求。
In order to solve the problem of the deviation of the total boron concentration of the coolant of nuclear island primary circuit measured by the off-line boron meter(OFBM) from the chemical titration boron concentration in the primary coolant in pressurized water reactor nuclear power plant exceeds the standard, the boron concentration algorithm of the OFBM was analyzed, and the impact factors and causes of the boron concentration deviation were analyzed. The analysis results show that the main impact factors of the boron concentration deviation were the 10 B concentration and the 10 B abundance of the nuclear island primary circuit coolant;the main reason of the boron concentration deviation generated was the OFBM boron concentration algorithm ignoring the 10 B abundance change in the primary circuit coolant of the nuclear island. A new boron concentration algorithm capable of tracking the 10 B abundance of the coolant of the nuclear island primary circuit was designed at the same time, and the 10 B concentration calculation function was implemented in this new algorithm. The simulation model of the new boron concentration algorithm was built finally, and the calculation accuracy of the new boron concentration algorithm was verified based on the calibration data of OFBM of two M310 units. The simulation results show that the calculation accuracy of the new boron concentration algorithm meets the OFBM design specifications.
作者
郑军伟
Zheng Junwei(State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment,China Nuclear Power Engineering Co.,Ltd.,Shenzhen,Guangdong,518172,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2021年第2期137-143,共7页
Nuclear Power Engineering
关键词
核电厂
硼表
硼浓度
偏差
算法
仿真
Nuclear power plant
Boron meter
Boron concentration
Deviation
Algorithm
Simulation
