Nuclear power hydrogen concentration detecting device

Abstract

The invention discloses a nuclear power hydrogen concentration detecting device. The device can perform real-time online monitoring on hydrogen concentration at a plurality of points in a confined space of a nuclear power station. The device consists of an optical fiber-based hydrogen concentration sensor array, a standard air chamber, an optical coupler, a light source, a photoelectric converter, a signal processing unit and a computer output unit. The hydrogen concentration sensor array is arranged in a containment, and other equipment is positioned on an instrument operating platform outside the containment. The optical fiber sensing technology-based nuclear power hydrogen concentration detecting device can simultaneously meet the requirements on safety, real-time online detection and noninterference to the detected environment, has the characteristics of small volume, light weight and high flexibility, and is particularly suitable for the nuclear power station containment environment requiring light load and small installation space. The nuclear power hydrogen concentration detecting device has the advantages of chemical corrosion resistance, suitability for severe environment temperature and no electromagnetic interference, and is suitable for remote large-scale multipoint multiplexing detection.

Description

technical field [0001] The invention relates to the technical field of hydrogen concentration detection in nuclear power containment, in particular to a large-scale multi-point distributed hydrogen concentration online detection device. Background technique [0002] According to the long-term plan of the National Development and Reform Commission, it is planned that by the end of 2020, China will build several million-kilowatt nuclear power units, and the total nuclear power capacity will reach 36 million kilowatts. The localization of nuclear power will drive the rapid development of related supporting industries, and various monitoring systems as part of supporting facilities of nuclear power plants will undoubtedly have a broader space for development and use. [0003] The safety of nuclear power is the focus of the industry's development. Although the frequency of accidents in nuclear power plants is extremely low, the risks cannot be ignored due to the serious conseque...

AI Technical Summary

Problems solved by technology

Gas chromatography requires sampling and analysis, which cannot be detected in real time; the density measurement method has long pipelines, difficult calibration, low precision, and slow speed; in the accident state of the containment of a nuclear power plant, the heat transfer instrument will be affected by the rapid changes in environmental conditions such as gas temperature and pressure. and lose its function; chemical catalytic instruments in a radioactive environment, the catalyst will be poisoned and lose its measurement function

Based on the electrochemical hydrogen sensor, the connection with the system is done through metal copper wires, which increases the weight of the load and power consumption. More importantly, for multi-point detection, the potential electromagnetic interference and electric sparks of the metal copper wires may would have catastrophic consequences

Images