Method and device for carrying out adsorption quantity improvement and dehydrogenation on radioactive gases

Abstract

The invention discloses a method for improving the adsorption quantity of radioactive gases such as radon gas and the like, and is characterized in that adsorption devices (two or more classes) constitute a series circuit, when the radioactive gas adsorbed by the adsorption device (at the previous class) in the circuit is transferred to the adsorption device (at the next class), under the action of a pump and a throttling valve, the pressure of the adsorption device (at the previous class) is lower than an atmospheric pressure, the pressure of the adsorption device (at the next class) is higher than the atmospheric pressure, the pressure ratio of the adsorption device (at the next class) to the adsorption device (at the previous class) is n, and the adsorption coefficient thereof is proportional to the pressure ratio, so that the radioactive gas adsorption quantity of the adsorption device (at the next class) is n times larger than that of the adsorption device (at the next class). Therefore, the aerosols in the air can be filtered, and the radioactive gas in the air can be adsorbed. Because the hydrogen gas is difficult to be adsorbed by adsorbing materials at normal temperature, the high-concentration hydrogen gas from nuclear power plants can be quickly discharged with the qualified air.

Description

technical field [0001] The invention relates to the technical field of radioactive gas treatment, in particular to a method and a device for absorbing radon in underground space and relatively high-concentration radioactive gas in nuclear power plants and then decaying to reduce the radioactivity to a safe level for discharge and nuclear power plant dehydrogenation. Background technique [0002] Radon in the air environment (with a half-life of 3.8 days) mainly comes from the precipitation on the surface of soil and building materials. It is difficult to remove radon in the underground space, so the concentration of radon is high, and it is easy to cause lung cancer after being inhaled. The higher concentration of radon in the underground space can be absorbed by activated carbon to reduce the radon concentration. Radioactive gases released from the core during reactor operation (some with long half-lives 85 Kr half-life is 10.77 years, 133 The half-life of Xe is 5.2 days,...

AI Technical Summary

Problems solved by technology

At present, hydrogen mitigation devices are generally installed in nuclear power plants to suppress the accumulation of hydrogen in nuclear power plants. In the event of a nuclear accident, nuclear power plants may produce a large amount of hydrogen, radioactive gases and radioactive aerosols. When produced, the effect is limited, so nuclear power plants may produce hydrogen explosions, leading to serious consequences

In addition, a large amount of radioactive gas and radioactive aerosols make it difficult for rescuers and equipment to enter the nuclear power plant for accident handling and rescue

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