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Film stripping tooling and process for decontamination of peelable film in hot chamber

A film stripping and film stripping technology, applied in the fields of decommissioning and radioactive waste treatment, operation and maintenance of nuclear facilities, can solve the problems of poor film-forming integrity of water-based strippable coatings, difficult for personnel to enter the decontamination operation, and high dose level, and achieve decontamination. High utilization rate of agent, good market prospect, less scattering effect

Active Publication Date: 2022-02-11
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a film stripping tool and process for decontamination of the peelable film in the hot chamber, so as to solve the problem of high dosage level in the hot chamber, difficulty for personnel to enter the interior to perform decontamination operations, and poor film-forming integrity of the existing water-based peelable coatings. It can effectively remove the small waste in the hot chamber and the loose pollutants on the stainless steel surface of the hot chamber

Method used

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  • Film stripping tooling and process for decontamination of peelable film in hot chamber

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Such as figure 1 As shown, the stripping tooling used for the decontamination of the peelable film in the hot chamber includes 4 supporting components that cooperate with the corners of the hot chamber, and a film forming component is arranged between the 2 supporting components on the same wall;

[0057] The supporting assembly includes a first L-shaped fixing piece 1 and a second L-shaped fixing piece 2, and the first L-shaped fixing piece 1 and the second L-shaped fixing piece 2 respectively cooperate with the top surface and the bottom surface of the corner of the heat chamber, The two ends of the first L-shaped fixing part 1 and the second L-shaped fixing part 2 are connected by a rectangular frame 3;

[0058] The film-forming component includes a horizontal connecting rod 4, and the two ends of the horizontal connecting rod 4 are respectively connected to the tops of two rectangular frames 3 located on the same wall by buckling, specifically, on the tops of the re...

Embodiment 2

[0061] Such as figure 1 As shown, this embodiment is based on Embodiment 1; the lengths of the two sides of the first L-shaped fixing member 1 are equal, the lengths of the two sides of the second L-shaped fixing member 2 are equal, and the first The side length of the L-shaped fixture 1 is greater than the length of the two L-shaped fixtures 2; the rectangular frame 3 is inclined at an angle of 3-5° to the vertical; 2 rectangular frames 3 on the same support assembly A cross bar 6 is arranged between the inner side walls of the inner wall.

Embodiment 3

[0063] A kind of decontamination process based on the decontamination tooling of the decontamination of peelable film in hot chamber described in embodiment 1, comprises the following steps:

[0064] S1. Arranging the film stripping tooling: arrange the 4 supporting components correspondingly at the 4 corners of the hot chamber, then install the horizontal connecting rod 4 between the 2 rectangular frames 3, fill the film-forming adsorption net 5, and place the cotton fiber fabric (Film-forming adsorption net 5) is placed on the wall and bottom surface around the simulated hot chamber; the humidity of the simulated hot chamber is 40%, and the temperature is 10°C;

[0065] S2. Pretreatment of peelable detergent (complex type): heat treatment to control the viscosity of the peelable detergent at 1000mPa·s; the peelable detergent is a translucent, viscous liquid, and the film body is broken The elongation rate is 0.6N / m, the density is 1.1g / cm3, the pH value is 6.0, and the tensi...

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Abstract

The invention discloses a film stripping tool and a process for decontaminating a peelable film in a hot chamber. The decontamination process includes the following steps: S1, arranging the film stripping tool: 4 supporting components are arranged on the 4 corners of the hot room, and then A horizontal connecting rod is installed between the two rectangular frames, and the film-forming adsorption net is filled; S2, the spraying device is used to spray the peelable detergent on the wall of the hot chamber; S3, after the film is formed, the peelable film is peeled off by a manipulator. The tooling of the present invention can realize the close fit of the walls, corners, and bottom of the film-forming adsorption network heat chamber, and can realize complete decontamination without dead ends; after spraying the peelable detergent, the film-forming adsorption network and the heat chamber The film-forming adsorption net and the peelable detergent are integrated, and the film-forming adsorption net can be combined with the peelable detergent to bond the pollutants on the film-forming adsorption net and can be retrieved, that is, by setting it as The film adsorption net improves the integrity of the film, improves the decontamination effect, and facilitates the later peeling treatment.

Description

technical field [0001] The invention relates to the technical field of nuclear facility operation maintenance, decommissioning and radioactive waste treatment, in particular to a stripping tool and process for decontaminating a strippable film in a hot chamber. Background technique [0002] As a long-term radioactive material analysis test site, the hot cell directly cuts, packages and tests irradiated fuel elements, various irradiated targets, irradiated materials, etc. During the operation, radioactive particles are scattered and acid-base Corrosion caused serious contamination of the stainless steel shell of the wall, internal equipment, ventilation system, and wall-penetrating pipes. Surface contamination levels up to 10 5 Bq / cm 2 , the radiation level of cutting and disintegrating hot cells reaches hundreds of mSv / h, and the main radioactive nuclides are 60 Co. 63 Ni, 137 Cs, 55 Fe, 90 Sr, α radionuclides (such as U, Pu, Am, etc.) may also exist in the hot cell u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F9/00
CPCG21F9/001G21F9/008
Inventor 苏冬萍王孝强梁帮宏匙芳廷罗婷周道辉张劲松陈云明李顺涛王小兵税胡高远李兵
Owner NUCLEAR POWER INSTITUTE OF CHINA
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