Non-radioactive method and device for measuring purification efficiency of iodine adsorber

Abstract

The invention provides a non-radioactive method and device for measuring the purification efficiency of an iodine adsorber, and the method comprises the steps: S1, a sucking pump is started to exhaust air, so that the air volume, temperature and humidity meet the detection requirements; S2, a tracer injection unit injects a non-radioactive isotope mixture gas of methyl iodide and air as a tracer; S3, a measuring probe emits laser with specific energy to break molecular bonds of corresponding energy of the non-radioactive methyl iodide gas molecules, positive and negative ions are separated out, and the concentration value of methyl iodide ions in the tracer agent is obtained by measuring current generated by ions in a potential field; and S4, the purification efficiency of the iodine adsorber is judged according to the concentration accumulated value of the methyl iodide ions in the upstream and downstream tracers. The radioactive risk in the process of non-radioactive measurement of the purification efficiency of the iodine adsorber is eliminated, and the engineering application requirement of efficiency measurement of the iodine adsorber is met.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a method and device for non-radioactive measurement of the purification efficiency of an iodine adsorber, and can also be extended to large public places with air purification and public protection requirements. Background technique [0002] Under normal or accidental conditions, nuclear power plants will produce a large amount of fission products, some of which will be transferred out in the form of airborne radioactive pollutants. In order to prevent environmental pollution and endanger human health, these airborne substances in the air must be treated purify. At present, the test methods for the efficiency test of iodine adsorbers at home and abroad cannot avoid the use of radioactive tracers. Domestic nuclear power plants have three types of test programs to regularly test the purification capacity of the iodine adsorber installed in the system: 1. Inject radioactive m...

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Problems solved by technology

To sum up, the risk of using radioactive reagents is reduced or transferred by changing the process flow; however, from the perspective of the whole process of the industry, the radioactive risk has always existed, either in the field test of the nuclear power plant, or transferred to the background laboratory or In the plant test, the influence of fission product radioactivity in the measurement process of reducing the purification efficiency of the entire iodine adsorber is the main problem at present

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