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A subcritical system for lead-based fast reactors or ads to remove 210 Method and apparatus for po

A 210po, subcritical system technology, applied in the field of nuclear energy, to achieve the effect of reducing difficulty, high melting point, and stable properties

Active Publication Date: 2018-02-23
CHINA NUCLEAR POWER TECH RES INST CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] due to radioactivity 210 Po is highly toxic and highly volatile, and the problem of radioactive polonium protection in lead-based fast reactors and ADS subcritical devices is the most difficult problem. At present, some mechanism studies have been carried out internationally. 210 No one has published patents and papers on Po concentration treatment and removal. At present, there is no method that can ideally solve the problem of polonium purification.

Method used

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  • A subcritical system for lead-based fast reactors or ads to remove <sup>210</sup> Method and apparatus for po
  • A subcritical system for lead-based fast reactors or ads to remove <sup>210</sup> Method and apparatus for po
  • A subcritical system for lead-based fast reactors or ads to remove <sup>210</sup> Method and apparatus for po

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] see in conjunction Figure 1-Figure 2 , for the present invention is used in lead-based fast reactor or ADS subcritical system to remove 210 Embodiment 1 of the Po device.

[0032] In this embodiment, it is used in lead-based fast reactor or ADS subcritical system to remove 210 Po device that enables 210 After Po and other radioactive substances pass through the rare earth filter membrane 21 and the physical filter membrane 22, their radioactive substance...

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Abstract

The invention provides a method for removing <210>Po from a lead-based fast reactor or ADS subcritical system. The method comprises the steps of filtering <210>Po aerosol in gas or <210>Po in a cooling agent by using rare earth filter devices each of which is mainly formed by combining a rare earth filter film and a physical filter film, wherein the rare earth filter film and the physical filter film are combined by using at least one of the combination modes of spraying, implanting, crystal growth, electro-deposition, filling and dispersions. The invention also provides a device for removing <210>Po from a lead-based fast reactor or ADS subcritical system. The method and the device for removing <210>Po from a lead-based fast reactor or ADS subcritical system enable the concentration of <210>Po in a cooling agent to be blow an NRC standard limit, solve the key technical problem in a lead-based fast reactor or ADS subcritical system and can protect people against the radioactive damage of <210>Po.

Description

technical field [0001] The invention relates to the field of nuclear energy, in particular to a method for removing 210 Po method and apparatus. Background technique [0002] Polonium is a new chemical element discovered in 1898 by Marie Curie and her husband Pierre Curie while processing uranium ore. Its English name is Polonium (symbol Po), its atomic number is 84, it has 25 isotopes, its mass number ranges from 192 to 218, and all of them are radioactive. 210 Po is one of the nuclides. Polonium is a silver-white metal that glows in the dark with a density of 9.4g / cm 3 , Melting and boiling points are 254°C and 962°C respectively. Polonium can be dissolved in concentrated sulfuric acid, nitric acid, dilute hydrochloric acid, aqua regia and dilute potassium hydroxide solution. [0003] 210 Po is a highly toxic radionuclide with a physical half-life of 138.4 days. It decays by releasing an alpha particle with an energy as high as 5.3 MeV and a decay heat of 140W / g. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F9/02
CPCG21F9/02
Inventor 曾献陈钊孙树斌张勇吕阳石秀安林继铭
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
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