用片型静电沉降器监测燃料元件的小面积破损

• 作 者: 黄逸达 罗才盛 周兆仙
• 机 构: 北京反应堆工程研究设计院,北京反应堆工程研究设计院,中国原子能科学研究院,
• 出 处: 核科学与工程
• 发表日期: 1987年01期
• 关键词: 燃料元件 静电沉降器 计数管 烧结不锈钢 裂变产物 步进电机驱动 测量特性 燃料芯块 压水堆 缓发中子

这是一种新型静电沉降器,用来监测破损燃料元件释放的气态裂变产物。沉降室的负极选用金属片,它由步进电机驱动,依次通过沉降和测量位置。试验的结果表明:这种沉降器的测量本底小;信号本底比高;测量特性优于沉降电极静止型(例如,烧结不锈钢多孔板或微型计数管型)沉降器。此外,它特别适用于监测压水堆燃料元件的小面积破损。

This is a new type of electrostatic precipitator that monitors gaseous fission products released from damaged fuel cells. The negative pole of the sedimentation chamber is made of metal sheet, which is driven by a stepper motor and passes through the settlement and measurement positions in turn. The results of the tests show that this type of settler has a low background of the measurement, a high signal floor ratio, and a superior measurement performance over settlers with stationary electrodes such as sintered stainless steel perforated plates or micro-count tubes. In addition, it is particularly suitable for monitoring small area breakdowns of PWR fuel elements.