Water solution for absorbing nuclear accident release matter

A technology for releasing substances and aqueous solutions, applied in nuclear engineering, radioactive purification, etc., can solve problems such as difficult removal of fission product decay heat, ineffective removal of organic iodine, inability to filter aerosols, etc.

Inactive Publication Date: 2017-03-22
CHINA NUCLEAR POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot filter aerosols with a particle size of less than 1 μm, and it can only delay the removal of inorganic i

Method used

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  • Water solution for absorbing nuclear accident release matter
  • Water solution for absorbing nuclear accident release matter
  • Water solution for absorbing nuclear accident release matter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: the preparation of aqueous solution

[0015] Prepare an aqueous solution for absorbing substances released by a nuclear accident according to the formula in Table 1 below.

[0016] Table 1 is used to absorb the formulation of the aqueous solution released by the nuclear accident

[0017]

[0018]

Embodiment 2

[0019] Embodiment 2: the investigation of aqueous solution stability

[0020] The aqueous solution prepared according to the formula in Table 1 above was subjected to stability investigation, and the inspection items and results are shown in Table 2 to Table 4 below.

[0021] Table 2 The stability investigation of the aqueous solution at room temperature and airtight for 5 months

[0022] recipe number Exterior Na 2 S 2 o 3 content

pH 1 transparent, no precipitation no change 12.3 2 transparent, no precipitation no change 13.0 3 transparent, no precipitation no change 12.9 4 transparent, no precipitation no change 13.0 5 transparent, no precipitation no change 13.2 6 transparent, no precipitation no change 13.0 7 transparent, no precipitation no change 13.4

[0023] Table 3 Stability investigation of aqueous solution at room temperature exposed to the open for 3 months

[0024] ...

Embodiment 3

[0028] Example 3: Simulation experiments of the aqueous solutions of various formulations absorbing substances released in nuclear accidents

[0029] As follows, use the figure 1 The device was used to carry out the simulation experiment of absorbing the substances released by the nuclear accident with the aqueous solutions of various formulations prepared in Example 1 above.

[0030] Establish figure 1 Experiments are carried out on the simulated experimental device for the absorption of substances released by nuclear accidents in the aqueous solution shown.

[0031] The simulated experimental device consists of an electric boiler 1, a pressure reducing valve 2, a steam superheater 3 and corresponding pipelines and valves connected in sequence to form an air supply system, which is used to heat air under high-temperature experimental conditions to meet the air temperature requirements of the experiment; The steam supply system is composed of air compressor 11, air storage t...

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PUM

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Abstract

The invention belongs to the field of nuclear safety protection, and relates to a water solution for absorbing nuclear accident release matter. The water solution contains Na2S2O3 with the mass percent concentration of 0.1%-0.5% and NaOH with the mass percent concentration of 0.2%-1.0%. The water solution has good stability, and a simulation experiment shows that when serious accidents happen to a nuclear power plant and melted cores melt through a pressure container and are in contact with a concrete bottom plate, the water solution can be used for effectively filtering out and absorbing aerosol, inorganic iodine and organic iodine released thereout.

Description

technical field [0001] The invention belongs to the field of nuclear safety protection and relates to an aqueous solution for absorbing substances released by nuclear accidents. Background technique [0002] When a serious accident occurs in a nuclear power plant, when the molten core melts through the pressure vessel and contacts the concrete floor, a large amount of radioactive substances, inert gases, inorganic iodine, organic iodine and aerosols will be released into the containment vessel. The continuous accumulation of non-condensable gas in the containment vessel may lead to overpressure failure of the containment vessel. In order to ensure the integrity of the containment, the nuclear power plant adopts a containment filtration and discharge system to filter and release the gas accumulated in the containment through active pressure relief. Only a containment filtration discharge system with reliable operation and high filtration efficiency can ensure the effective r...

Claims

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Application Information

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IPC IPC(8): G21F9/02
CPCG21F9/02
Inventor 杨理烽朱京梅李嫦月王晓江李军吴明刘长亮丁亮闫昌琪孙中宁谷海峰
Owner CHINA NUCLEAR POWER ENG CO LTD
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