Online measurement device and method for inert gas in gaseous effluent of nuclear facility

Abstract

The invention discloses an online measurement device and method for inert gas in gaseous effluent of a nuclear facility. The device comprises a shielding device, a sampling system, a sampling container and an in-situ gamma spectrometer system, wherein the sampling container comprises a sample gas inlet and a sampling port; the in-situ gamma spectrometer system comprises a detector and a digital spectrometer; the shielding device covers the outer side of the sampling container; the sampling system communicates with the sample gas inlet so as to convey a gaseous effluent to be detected to the sampling container; and the detector is arranged at a position close to the sampling port so as to detect the gaseous effluent in the sampling container and send a detection signal obtained by detectionto the digital spectrometer. According to the invention, the type and the activity concentration of radionuclide in a gaseous effluent sample can be directly measured, so the activity concentration of the radioactive inert gas in the effluent can be calculated; and thus, the related requirements of gaseous radioactive effluent monitoring are met.

Description

technical field [0001] The invention relates to the field of nuclear power, in particular to an on-line measurement device and method for inert gas in the gaseous effluent of a nuclear facility. Background technique [0002] As a safe, reliable and clean energy, nuclear power has become an important part of the power industry. At present, the domestic nuclear energy industry is developing rapidly, and the number of nuclear power units under construction in China ranks first in the world. According to the current trend, the number of new nuclear power units put into operation in China will continue to rise in the future. [0003] With the vigorous development of domestic nuclear power and the wake-up call of the Fukushima nuclear accident in Japan in 2011, the dose impact of gaseous radioactive effluents on the environment and the public has attracted more and more attention from the state and the concern of residents near the power plant. [0004] At present, the monitoring...

AI Technical Summary

Problems solved by technology

The lower detection limit of the noble gas in some nuclear power plants is much larger than the actual radioactive noble gas activity (especially for 85 Kr measurement), if the requirements of the above national standards are followed, the difference in the emission of units of the same reactor type will be very large, resulting in a large difference in the assessment of environmental and residential doses, and it does not meet the monitoring standards recommended by the international

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