Online Detection System for Harsh Environment Aerosols

Abstract

An on-line detection system for aerosols in harsh environments, comprising: sequentially connected aerosol sampling mechanisms, at least one level of cooling and dilution devices, on-line measuring devices, post-installed flow measurement control devices, and exhaust gas collection devices, wherein: the aerosol sampling mechanism is set The gas to be tested is extracted from the pressure vessel of the gas to be tested and sent to the cooling and dilution device. The cooling and dilution device mixes the gas to be tested with the dilution gas with a lower temperature, lower pressure and no particles in the dilution chamber to lower the temperature and pressure. , the online measurement device extracts the gas to be tested through the sampling probe inside the dilution chamber and detects it online, and the post-installed flow measurement control device controls the extraction flow and the measured gas enters the exhaust gas collection device through the ventilation pipe to complete the measurement. The invention has low maintenance cost and can realize long-term on-line measurement.

Description

technical field [0001] The invention relates to a technology in the field of nuclear power production safety, specifically a harsh environment aerosol with a temperature between 100-200°C, a pressure between 1-10bar, and a steam concentration between 1%-95%. real-time online detection system. Background technique [0002] Aerosol measurement technology is commonly used in the field of nuclear energy to detect the solubility distribution and changes of aerosol in the reactor containment to determine whether there is leakage of radioactive fission products, so as to ensure the safety of the reactor. The environment in the reactor containment is different from the normal atmospheric environment. Especially under accident conditions, a large amount of aerosols are released into the containment along with high-temperature and high-pressure water vapor from the pipeline, resulting in high temperature, high pressure, and high humidity in the containment aerosols. . The existing a...

AI Technical Summary

Problems solved by technology

The existing technology involves many structures, has high requirements on the characteristics of the filter membrane, and the operation is complicated, so it is impossible to realize real-time online detection of aerosols in the containment under accident conditions

Due to the characteristics of high temperature, high pressure and high water vapor concentration of nuclear power plant aerosols, especially the existence of water vapor, the online measurement devices currently on the market directly measure the extracted aerosols with large errors

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