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Devices for reducing radionuclide emissions during extreme accidents in nuclear power plants

A technology for radionuclides and nuclear power plants, applied in the field of nuclear power, can solve problems such as non-precipitation, and achieve the effect of reducing concentration, solution toxicity and corrosiveness

Active Publication Date: 2017-09-29
HENGYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The method and device can only be used for high-concentration radioactive water 131 I. 137 Cs and 90 Sr is adsorbed and precipitated, and it cannot be used for high-concentration radioactive water. 132 Te for precipitation

Method used

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  • Devices for reducing radionuclide emissions during extreme accidents in nuclear power plants
  • Devices for reducing radionuclide emissions during extreme accidents in nuclear power plants
  • Devices for reducing radionuclide emissions during extreme accidents in nuclear power plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1. The device for reducing the emission of radionuclides during extreme accidents in nuclear power plants includes an adsorption box 7 that is preset in the pit 19 of the containment 15 and is equipped with high-temperature-resistant inorganic adsorption materials, and is preset in the containment 15 and is equipped with different formulas. The first water tank 13 of the solution, the second water tank 2, the first solenoid valve 8, the second solenoid valve 6, the first float valve 10, the second float valve 5 and the remote controller 1 installed outside the containment 15 of the nuclear power plant.

[0042] The adsorption box 7 is composed of a box body 7-1 and a high-temperature resistant inorganic adsorption material contained in the box body 7-1. The box body 7-1 is a square container, and plural walls are arranged on the four walls of the box body 7-1. A through hole 7-2.

[0043] The high temperature resistant inorganic adsorption material is zeolite...

Embodiment 2

[0064] Embodiment 2. The device for reducing radionuclide discharge during extreme accidents in nuclear power plants, referring to Embodiment 1, differs from Embodiment 1 in that:

[0065] The components of the solution in the first water tank 13 are strontium ions, iodide ions, tellurite and boric acid. %-2%, boric acid 1%-4%, and the rest is water.

[0066] When the solution components in the first water tank 13 are strontium ions, iodide ions, tellurite and boric acid, add alkaline solution sodium hydroxide or lithium hydroxide in the first water tank 13 to adjust the pH value of the solution to neutral .

[0067] The solution components in the second water tank 2 are silver ions and boric acid, and the components are expressed in mass %, specifically: 0.1%-4% of silver ions, 1%-4% of boric acid, and the rest is water.

[0068] When the solution components in the second water tank 2 are silver ions and boric acid, an alkaline solution sodium hydroxide or lithium hydroxide...

Embodiment 3

[0072] Embodiment 3: The device for reducing the discharge of radionuclides during extreme accidents in nuclear power plants, including the adsorption box 7 preset in the pit 19 of the containment vessel 15 and equipped with high-temperature-resistant inorganic adsorption materials, and the first float valve preset in the containment vessel 15 10. The second float valve 5 and the first water tank 13, the second water tank 2, the remote controller 1, the first solenoid valve 8, and the second solenoid valve 6 that are preset outside the containment vessel 15 and contain solutions of different formulas.

[0073] The adsorption box 7 is composed of a box body 7-1 and a high-temperature resistant inorganic adsorption material contained in the box body 7-1. The box body 7-1 is a square container, and plural walls are arranged on the four walls of the box body 7-1. A through hole 7-2.

[0074] The high temperature resistant inorganic adsorption material is zeolite, or sodium titanos...

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Abstract

A device for reducing radionuclide emission in extreme accidents of nuclear power plants comprises an adsorption tank, three water tanks, three electromagnetic valves, three float valves and a remote controller. The adsorption tank is filled with a high-temperature-resistant inorganic adsorption material is preset in a containment sump, the three water tanks filled with different solutions are preset in a containment, and the remote controller is mounted outside the containment of the nuclear power plant. The solution in the first water tank comprises, by weight, 0.5%-5% of strontium ions, 0.1%-2% of iodide ions, 0.1%-2% of tellurous acid radicals and the balance water or comprises, by weight, 0.5%-5% of strontium ions, 0.1%-2% of iodide ions, 0.1%-2% of tellurous acid radicals, 1%-4% of boric acid and the balance water. The solution in the second water tank comprises, by weight, 0.1%-4% of silver ions and the balance water or comprises, by weight, 0.1%-4% of silver ions, 1%-4% of boric acid and the balance water. The solution in the third water tank comprises, by weight, 0.5%-5% of sulfate radicals and the balance water or comprises, by weight, 0.5%-5% of sulfate radicals, 1%-4% of boric acid and the balance water.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a device for reducing the discharge of radioactive nuclides in extreme accidents of the nuclear power plant after the primary circuit in the containment of the nuclear power plant is broken. Background technique [0002] Under the extreme accident conditions of nuclear power plants, after the primary circuit in the containment of nuclear power plants ruptures, a large amount of high-temperature, high-pressure and high-concentration radioactive water will be released into the containment. yes 131 I, while those with larger emissions and longer half-lives are 137 Cs and 90 Sr. For high concentrations of radioactive water 131 I. 137 Cs and 90 Adsorption and precipitation of Sr can reduce the concentration of radioactive substances in the containment water. When the containment is decompressed and vented or ruptured, it can reduce the discharge of radionuclides to the atm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F9/12
CPCG21F9/12
Inventor 谭延亮蒋伍玖袁红志
Owner HENGYANG NORMAL UNIV
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