Online detection system of aerosol under severe environment

Abstract

The invention discloses an online detection system of aerosol under a severe environment. The online detection system comprises an aerosol sampling mechanism, one or more stages of cooling dilution devices, an online measuring device, a rear flow measuring control device and an exhaust gas collecting device which are sequentially connected; the aerosol sampling mechanism is arranged in a pressurecontainer of to-be-measured gas to extract the to-be-measured gas and convey the to-be-measured gas to the cooling dilution devices; the cooling dilution devices mix the to-be-measured gas with particle-free dilution gas with the low temperature and low pressure in a dilution cavity for cooling and decompression; the online measuring device extracts the to-be-measured gas through a sampling probein the dilution cavity and detects the to-be-measured gas online; and the rear flow measuring control device controls the extraction flow and feeds the measured gas into the exhaust gas collecting device through a ventilation pipeline to complete measurement. The maintenance cost is low, and long-term online measurement can be achieved.

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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