Preparation method of preparation for radioactive gas purifying capability test in nuclear power plant

A technology of radioactive gas and purification ability, applied in chemical instruments and methods, halogenated hydrocarbon preparation, organic chemistry, etc., can solve problems such as management risks

Inactive Publication Date: 2010-11-03
CHINA GENERAL NUCLEAR POWER CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nuclear power plants have spent a lot of manpower and financial resourc...

Method used

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  • Preparation method of preparation for radioactive gas purifying capability test in nuclear power plant
  • Preparation method of preparation for radioactive gas purifying capability test in nuclear power plant
  • Preparation method of preparation for radioactive gas purifying capability test in nuclear power plant

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1, put into 8ml acetonitrile, 5g non-radioactive potassium iodide successively in 50ml round bottom reaction flask, wherein non-radioactive potassium iodide is used for simulating radioactive iodine source (the same below, the following examples will not repeat them), then put 2.5ml acetonitrile Dimethylphosphorylacetate and 3.8ml trimethylchlorosilane were mixed evenly, and reacted under magnetic stirring. The reaction temperature was 30°C, and the reaction time was 15min. The yield of non-radioactive methyl iodide in the liquid is about 46% through density analysis.

Embodiment 2

[0035] Example 2, in a 50ml round bottom reaction flask, put 10ml of acetonitrile, 5g of non-radioactive potassium iodide in sequence, then put in 2.75ml of dimethyl o-chlorophenyl phosphate, 3.8ml of trimethylchlorosilane and mix evenly, under magnetic stirring The reaction was carried out at a reaction temperature of 25 °C and a reaction time of 10 min. The non-radioactive methyl iodide was collected by reflux condensation at 70 °C for 1.5 h, and the yield of non-radioactive methyl iodide was about 55% by gas chromatography analysis.

Embodiment 3

[0036] Embodiment 3, put 10ml acetonitrile, 5g non-radioactive sodium iodide successively in 50ml round bottom reaction flask, then put into about 3ml CCl 3 PO(OCH 3 ) 2 , mix about 4ml trimethylchlorosilane, react under magnetic stirring, the reaction temperature is 25°C, the reaction time is 15min, reflux and condense at 70°C to collect non-radioactive methyl iodide for 1.5h, and analyze the non-radioactive methyl iodide by gas chromatography The yield of iodine is about 51%.

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Abstract

The invention discloses a preparation method of a preparation for a radioactive gas purifying capability test in a nuclear power plant, which comprises the following steps of: mixing by using a methyl phosphate compound or a dimethylacetal compound, acetonitrile, trimethylchlorosilane and a radioactive iodine source as raw materials, and then reacting for 10-40 minutes at the temperature of 20-50DEG C to obtain the preparation for the radioactive gas purifying capability test in the nuclear power plant. The invention provides the preparation method of the preparation for the radioactive gas purifying capability test in the nuclear power plant, wherein reactants are not virulent, the reaction can be carried out at high speed and high efficiency without high temperature, and other productsexcept methyl iodide have no harm or small toxicity to nuclear-grade impregnated active carbon in an iodine filter.

Description

technical field [0001] The invention belongs to the technical field of million-kilowatt-level advanced pressurized water reactor nuclear power, and relates to a preparation method of nuclear power safety testing supplies. Background technique [0002] In the reactor radioactive fission products of mega-kilowatt advanced pressurized water reactor nuclear power plants, gaseous radioactive iodine is mainly present as molecular iodine ( 129 I 2 , 131 I 2 ) and organic iodine (CH 3 131 I). Among them, elemental molecular iodine accounts for 90-95% of gaseous radioactive iodine, and organic iodine only accounts for 5-10% of gaseous radioactive iodine. The concentration does not exceed 1Ci / m 3 or 8μg / m 3 , but because the human thyroid gland has a high absorption capacity for radioactive iodine, it is very harmful to human health after release. Therefore, it is necessary to use an iodine filter (or iodine adsorber) in the exhaust system for iodine filtration. Treatment, us...

Claims

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Application Information

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IPC IPC(8): C07C19/07C07C17/093
Inventor 孔海霞杜建兴丘丹圭张大勇史英霞边守利郭亮天吴宇坤吴振龙李现峰韩丽红杨列堂
Owner CHINA GENERAL NUCLEAR POWER CORP
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