Differential-pressure-adjustable emanation rock medium radon precipitation rate measuring device and using method thereof

Abstract

The invention discloses a differential-pressure-adjustable emanation rock medium radon precipitation rate measuring device and a using method thereof. The upper end of a sample box (2) is connected with a sealing top cap (3), and the lower end is connected with a cylinder base (5) and a porous permeable plate (4). The outlet of a top cap air charging module (15) and the inlet of a top cap vacuum pumping module (17) are connected with the sealing top cap (3), and are further connected with a first precision digital barometer (13). The outlet of a base nitrogen charging module (16) and the inlet of a base vacuum pumping module (18) are connected with the cylinder base (5), and are further connected with a second precision digital barometer (14). The outlet of the top cap vacuum pumping module (17) and the outlet of the base vacuum pumping module (18) are connected with a vacuum pump module (19). The invention relates to a differential-pressure-adjustable emanation rock medium radon precipitation rate measuring device which can effectively measure the medium radon precipitation rate of emanation rocks under different differential pressures.

Description

technical field [0001] The invention relates to a device for measuring radon exhalation rate of emanating rock medium, in particular to a measuring device for radon exhalation rate of emanating rock medium with adjustable pressure difference. The invention also relates to a method for using the measuring device for the radon exhalation rate of emanating rock medium with adjustable pressure difference. Background technique [0002] The emanating rock medium contains radium element ( 226 Ra) rock, which belongs to a kind of porous media. Common emanating rock media include natural building materials, natural stone, natural rock ore, uranium ore, etc., all of which can spontaneously or artificially release radioactive harmful gases—radon ( 222 Rn). At present, the migration mechanism of radon in porous media widely accepted by the world mainly includes the following two types: (1) radon diffusion driven by concentration gradient, which promotes the active migration of radon;...

AI Technical Summary

Problems solved by technology

Therefore, by studying the precipitation of radon in erupting rock medium under different pressure differences, it can theoretically provide useful enlightenment and guidance for the selection of ventilation methods. Device and calculation method for effective measurement of radon exhalation rate in rock medium

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