基于声学方法的核电厂取水口冷源生物量监测

Monitoring of Cold Source Biomass at Water Intake of Hongyanhe Nuclear Power Plant by Using Acoustic Methods

近年来,黄、渤海域夏季均有水母爆发现象,对于核电厂冷源取水安全产生重要影响,威胁核电厂正常运行。本研究以常见入侵核电厂取水口的水母等海洋生物为监测目标,设计开发了基于科学探鱼仪水平探测方法的定点式核电冷源生物声学监测系统,并在红沿河核电厂取水口的左外侧沉箱进行设置,于2019年6月至9月期间对随海流进入取水口的水母等冷源生物进行了实时监测实验,获得水母的资源密度信息。声学数据使用Echoview软件处理分析,进行平均SV的计算、和单体目标强度检测,并计算监测点当日平均通量。

In recent years, there have been large-scale jellyfish outbreaks in the Bohai Sea in summer, which have greatly affected the water intake for cold source of nuclear power station and threatened the normal operation. In this study, a fixed-point acoustic monitoring system for nuclear power cold-source organisms based on the horizontal beam method by echosounder was designed and developed, and set up in caisson of the water intake of Hongyanhe Nuclear Power Plant. Real-time monitoring experiments were conducted from June to September 2019 on jellyfish and other cold-source organisms entering the intake with the current. The acoustic data were processed and analysed using Echoview for calculation of daily average SV and average TS to calculate daily average flux at the monitoring point.