Methyl iodide gas generation method for iodine adsorber efficiency test and generator

Abstract

The invention provides a methyl iodide gas generation method for iodine adsorber efficiency test and a generator. The method comprises the following steps: A, enabling a generation cavity for storingliquid methyl iodide and a gasifying place to be in a negative pressure state; B, sucking the liquid methyl iodide into the generation cavity in the step A by virtue of negative pressure; C, injectingair flow into the generation cavity in the step B at the same time to enable the liquid methyl iodide in the generation cavity to form bubbles, and heating the injected methyl iodide to assist gasification when gasification is insufficient; and D, making the gasified methyl iodide and compressed air mixed and enter a test system, and testing the adsorption efficiency of an iodine adsorber. The generation method of the non-radioactive methyl iodide gas in the scheme can effectively meet the gas use requirements of iodine adsorber efficiency detection, has important guarantee for the personal safety of iodine adsorber efficiency test detection personnel, and is fast, stable and reliable in the whole generation process.

Description

technical field [0001] The invention relates to the technical field of detection equipment in the nuclear field, in particular to a method for generating methyl iodide gas and a generator for efficiency detection of an iodine adsorber. Background technique [0002] Nuclear reactors will produce radioactive iodine under operating or accident conditions, and these iodine will be released to other systems in the form of elemental iodine, inorganic iodide, organic iodide, etc. along with the movement of the reactor coolant. Nuclear facilities set up iodine adsorption in the gas treatment system The device is used to adsorb and purify the radioactive iodine in the exhaust gas. In order to ensure the safe and reliable operation of the nuclear air purification system, and make the exhaust air of the nuclear facility ventilation system meet the effluent discharge limit required by the relevant national standards, the iodine adsorber must be installed before the iodine adsorber leave...

AI Technical Summary

Problems solved by technology

The efficiency test of the traditional iodine adsorber is carried out by the radioactive methyl iodide method, but there are radioactive risks in the operation of the radioactive methyl iodide method. Therefore, using non-radioactive methyl iodide instead of radioactive methyl iodide for the efficiency test of the iodine adsorber can ensure The representativeness of the results can avoid the problems of high cost, high operation requirements and high risk of radioactive leakage caused by radioactive methyl iodide test

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