基于中子噪声分析技术的核电站振动监测系统研制

Development of Internal Vibration Monitoring System for NPP Based on Neutron Noise Technique

以秦山核电二期扩建工程松脱部件与振动监测系统(KIR)供货项目为背景,研制出了VMS C1201堆内构件振动监测系统。该系统由4个加速度通道和8个中子噪声通道组成,采用PXI总线技术以及虚拟仪器、数据库管理和监测报告自动生成技术,信号调理采用现场可编程门阵列(FPGA)程控技术,各通道信号采用同步处理技术;监测软件采用原始数据存储,并提供开放式接口。该系统具有时程分析、自谱与互谱分析以及压力容器、吊篮和燃料组件振动监测功能。

The vibration monitoring system for internal structures developed for Qinshan Nuclear Power Phase Ⅱ Extension Project is able to monitor the vibration of reactor pressure vessel and internal structures, which comprises four acceleration and eight neutron noise channels. Several modern techniques are applied in the system, for instance, FPGA are adopted in signal preprocessing; PXI bus technology are applied for the synchronization processing between channels and modules; Original data is stored in a standard form and an open entry is supplied; The signal analysis tools include time field, auto-power spectrum density, cross-power spectrum, coherence and phase are provided for the vibration analysis. The system can monitor the vibration of pressure vessel, core barrel and fuel assemblies, and etc.