核电站松脱部件监测系统研制

以秦山核电二期扩建工程松脱部件与震动系统(KIR)供货项目为背景,研制出了松脱部件监测系统(LPMS)C1201。该系统由10个监测通道组成,对压力容器和蒸汽发生器内产生的松脱部件进行实时监测。信号调理和报警处理采用现场可编程门阵列(FPGA)程控技术;松脱部件甄别采用了DSP数字化、松脱部件信号长短有效值浮动甄别、时间延迟和通道复核联合甄别等技术,使系统具有强抗误报警能力;系统自检采用I2C控制与多路分配程控技术;系统采用PXI总线技术,使通道间和模块间同步,满足定位分析需要;采用虚拟仪器和数据库管理技术,界面可视化强,接口开放式;系统还具有软硬件故障自检与故障通道切除、磁盘空间检测、软件停电保护等功能。

Development of Loose Parts Monitoring System for Nuclear Power Plants

The loose part monitoring system developed for Qinshan Nuclear Power Phase II Extension Project is able to monitor three regions, which comprises ten monitoring channels and monitors the loose parts in RPV and SG. Several modern techniques are applied in the system, for instance, FPGA are adopted in sig-nal preprocessing and alarm processing, the DSP is applied in loose parts event discriminating, which includ-ing the real-time short RMS compared with floating long RMS, time delay, alarm channels check, and etc. These virtues make the system a powerful capacity of anti-misinformation. DAQ instead of tape recorder en-sures the integrality of data log. The synchronization of PXI bus meets the need of the locality analysis. The techniques of virtual instrument and database management provide an open entry for the diagnose of loose part events, and the display turns to more visual. In addition, the system had other useful functions, such as fault channels self-testing and shutting, disk space checking and software protecting as soon as power-off.