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

The technology of a gas generator and an iodine adsorber is applied in the field of detection equipment in the nuclear field, and can solve the problems of high use cost, high operation requirements and high risk of radioactive leakage, and achieve the effect of fast, stable and reliable production process.

Pending Publication Date: 2020-04-14
CHINA INST FOR RADIATION PROTECTION
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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

Method used

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

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Present embodiment at first provides a kind of methyl iodide gas generation method that is used for iodine adsorber efficiency detection, and it comprises the following steps:

[0023] S1. Vacuumize the generating chamber

[0024] Reduce the vacuum degree of the generating chamber used for storing liquid methyl iodide and gasification place to below -0.2 bar;

[0025] S2, add liquid methyl iodide

[0026] Adding a quantitative amount of liquid methyl iodide to the above-mentioned generating chamber in a vacuum state;

[0027] S3, gasification

[0028] Simultaneously, air flow is injected into the generation cavity in the above step B, so that the liquid methyl iodide in the generation cavity forms bubbling, and when the gasification is not enough, the injected methyl iodide is heated to assist gasification;

[0029] S4. Inj...

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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...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N1/34G01N30/00
CPCG01N1/28G01N1/34G01N30/00
Inventor 俞杰于伟跃李永国任宏正王稹杜建兴杨彪吴波梁飞丘丹圭刘群陈建利韩丽红郭哲斌
Owner CHINA INST FOR RADIATION PROTECTION
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