Activated carbon bag radon gas adsorption measurement method
A measurement method and activated carbon technology, which are applied in the field of uranium mine exploration, can solve the problems of different depths of pits, cumbersome shielding device of lead canisters of activated carbon measuring instruments, and small amount of carbon loaded, so as to simplify cumbersome operations, reduce the economic cost of radon measurement, The effect of improving reliability
Pending Publication Date: 2021-02-19
BEIJING RES INST OF URANIUM GEOLOGY
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Problems solved by technology
The traditional method of measuring radon with activated carbon has the following disadvantages: 1. The lead tank shielding device of the activated carbon measuring instrument is heavy and inconvenient to carry; Increased statistical fluctuation error; three, the amount of carbon contained in the activated carbon plastic bottle is small, and the thickness of the activated carbon in the plastic bottle after the activated carbon is installed reaches 3.5cm. The amount of radon gas, while the activated carbon itself absorbs gamma rays, the actual measurement is to measure the bottom of the bottle close to the probe, which causes a large error; 4. It is time-consuming and laborious to dig pits manually, and the depth of the pits is often different; 5. Activated carbon traps The collection device is too cumbersome and requires desiccant, silk floss, plastic bottles, cups, etc., which is inconvenient to carry and assemble
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[0034] The present invention is further described below in conjunction with embodiment:
[0035] A kind of activated carbon bag adsorption radon gas measuring method of the present invention comprises the following steps:
[0036] Step (1) preparing an activated carbon bag adsorption device;
[0037] Step (1.1) Choose a cloth with good air permeability and not easy to clay to make an activated carbon bag. The volume specification of the activated carbon bag requires a cylinder with a bottom diameter of 9cm and a height of 1cm, and mark the center position of the upper and lower end surfaces of the activated carbon bag;
[0038] Step (1.2) Put the activated carbon in the oven and bake it at 200°C for 8 hours. After baking and cooling, put 100g of activated carbon per pack into the activated carbon bag formulated in step (1.1) and seal it, and The activated carbon is packaged in a self-sealing plastic bag and sealed.
[0039] Step (2) Select the gamma spectrometer and measure ...
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The invention belongs to the technical field of uranium ore exploration, and particularly relates to an activated carbon bag radon gas adsorption measurement method. The method comprises the followingsteps: (1), preparing an activated carbon bag adsorption device; (2), selecting a gamma spectrometer and measuring a background value of an activated carbon bag workshop and a net counting rate of a214Bi region of interest in a field site; and (3), calculating and correctingthe radon concentration. The measurement device composed of the activated carbon bag and the portable gamma spectrometer can effectively capture gaseous, liquid or particulate radon, the radon decay daughter 214Bi characteristic energy peak net counting rate is measured and converted into the radon concentration after correction processing, tedious operation of a conventional activated carbon radon measurement method is remarkably simplified, and the radon measurement economic cost is greatly reduced. And the reliability of radon measurement data is effectively improved.
Description
technical field [0001] The invention belongs to the technical field of uranium ore prospecting, and in particular relates to a method for measuring radon gas absorbed by activated carbon packages. Background technique [0002] Activated carbon radon measurement method is a prospecting method in the field of uranium ore exploration. It is a cumulative adsorption radon measurement method. Better indication of deep uranium mineralization information. [0003] The activated carbon radon measurement method is to embed an activated carbon device in the soil, use the strong adsorption of activated carbon to capture radon in the ground gas, and measure the radon concentration in the soil through a gamma measuring device. The traditional method of measuring radon with activated carbon has the following disadvantages: 1. The lead tank shielding device of the activated carbon measuring instrument is heavy and inconvenient to carry; Increased statistical fluctuation error; three, the ...
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IPC IPC(8): G01V5/00
CPCG01V5/00
Inventor 李必红杨龙泉赵丹
Owner BEIJING RES INST OF URANIUM GEOLOGY