| Popis: |
The key technologies such as accident monitoring, installation and positioning, and signal abnormality of Nuclear Instrumentation System (hereinafter referred to as RPN) is studied in this paper. Through analyzing the requirements of post-accident monitoring laws and regulations, the compensation ionization chamber monitoring technology and fission chamber monitoring technology are deeply studied. The positioning mechanism of detector components is analyzed, and the positioning technical characteristics of “push-pull trolley type” and “bucket type” are systematically studied. The signal abnormality phenomenon is analyzed, and the equivalent circuit diagram and fault tree are established to analyze the technical causes of signal abnormality. Through the research on the key technologies, an advanced system scheme is independently realized. The independent scheme adopts fission chamber accident monitoring technology, realizes “bucket type” installation of detector components, and adopts measures such as improving gateway redundancy to ensure reliable and safe operation of the unit. The autonomous scheme has been applied to an advanced third-generation pressurized water reactor in China, and the research results have certain reference value for the research and design improvement of other reactors. |
