Containment pressure relief and exhaust activity monitoring system

Abstract

The invention relates to the field of radiation measurement and nuclear electronics, and provides a containment pressure relief and exhaust activity monitoring system, which comprises a safety valve used for active pressure relief, a snakelike segmented cascade filter used for steam-water separation and aerosol filtration, a high-temperature flowmeter used for flow measurement and a detection device used for activity concentration measurement. The safety valve is communicated with a containment vessel, gas is subjected to pressure relief from the containment vessel through the safety valve and flows through the snakelike segmented cascade filter to realize gas-water separation and aerosol filtration, the filtered gas is measured by the flowmeter and then is measured by the detection device through the measuring pipe section, and the detection device gives radioactive activity concentration information. The monitoring system provided by the invention can effectively realize nuclear signal acquisition, processing, uploading and storage in a high-temperature, high-pressure and high-radiation environment, and solves the problems that a radiation monitoring system loses efficacy and radioactivity is difficult to measure in the high-temperature, high-pressure and high-radiation environment in the containment vessel.

Description

technical field [0001] The invention relates to the fields of radiation measurement and nuclear electronics, in particular to a containment pressure relief exhaust activity monitoring system, which is suitable for radiation measurement in nuclear power plants or nuclear logging wells, and is especially suitable for local high pressure and high radiation for a long time System online radioactivity concentration measurement. Background technique [0002] Nuclear power is considered to be a clean energy source and its superiority is increasingly evident. The biggest obstacle to the development of nuclear power is the safety issue of nuclear power. With the enhancement of human nuclear safety awareness, more and more attention is paid to the monitoring of radiation dose rate around nuclear power plants under accident conditions. The activity monitoring system of containment depressurization exhaust is responsible for evaluating the activity of radioactive gases emitted from con...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the existing conventional monitoring technology for serious accidents in nuclear power plants, and provide a containment pressure relief and exhaust activity monitoring system, which can effectively realize nuclear signal acquisition and processing in high temperature, high pressure and high radiation environments , uploading and storage, which solves the problem that the radiation monitoring system fails and the radioactivity is difficult to measure in the high temperature and high pressure environment in the containment

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