核电厂严重事故工况下氢气浓度监测装置研制

Development of Hydrogen Concentration On-line Monitoring Devices under Severe Accidents in NPPs

研究解决了电化学测氢气浓度传感器中电极涂覆、结构设计等关键技术问题,设计制造了严重事故工况下氢气浓度在线监测装置样机,开展了不同压力、温度、氢气浓度条件下测试试验,正常工况下的性能测试试验和环境适应性试验。结果表明研制的氢气浓度监测装置具有选择性强、能实现在线监测、响应时间快、测量范围宽、测量精度高等特点,可用于我国的"华龙一号"(HPR1000)和大型先进压水堆(CAP1400)核电厂严重事故工况下氢气浓度在线监测。

The key technology problems such as the electrode coating and the structure design of the hydrogen concentration monitor are sovled in this paper. The on-line hydrogen concentration monitoring prototype was designed and manufactured successfully, and the measuring tests under different pressure, temperature and hydrogen concentration conditions, and the performance tests under normal conditions are conducted. The test results indicated that the above monitoring prototype could on-line monitor the hydrogen concentration with good selectivity, short response time, wide measuring range and high monitoring accuracy. The on-line hydrogen concentration monitoring devices can be applied to the HPR1000 and CAP1400 nuclear power plants.