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Heavy water reactor fuel canning graphite emulsion paint and preparation method thereof

A fuel cladding and graphite emulsion technology, applied in epoxy resin coatings, coatings, etc., can solve problems such as pores in end plug materials and excessive hydrogen content in components, and achieve good construction performance, satisfactory volatilization speed, and reasonable particle size distribution. Effect

Active Publication Date: 2012-07-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main manufacturing defects include fuel element end plug welding defects, end plug material pores, excessive hydrogen content in the element, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Raw materials (mass percentage): graphite powder 25%, thermoplastic acrylic resin 20%, epoxy resin 1.5%, fumed silica 1.5%, mixed solvent 52%. In the solvent, isopropanol 90%, terpineol 5%, n-butanol 5%.

[0024] The preparation method is as follows:

[0025] (1) Preparation of mixed solvent: Weigh 46.8 g of isopropanol, 2.6 g of terpineol, and 2.6 g of n-butanol, place them in a stirring tank and stir, dissolve and mix uniformly;

[0026] (2) Add 20g of thermoplastic acrylic resin and 1.5g of epoxy resin, stir, and fully dissolve;

[0027] (3) add fumed silica 1.5g, stir and mix uniformly;

[0028] (4) put 25g of graphite powder into the stirring tank, and stir until uniformly mixed;

[0029] (5) Transfer the uniform slurry in the stirring tank to the rolling mill, and roll the ball for 1 to 4 hours, and then pass through a 100-mesh sieve in a uniform graphite milky state, and package it.

Embodiment 2

[0031] Raw materials (mass percentage): graphite powder 20%, styrene-acrylic resin 14%, dibutyl phthalate 0.5%, polyamide wax 6900-20X 0.5%, mixed solvent 65%. In the solvent, isopropanol 85%, n-butanol 5%, hexylene glycol 5%, propylene glycol methyl ether 5%.

[0032] The preparation method is as follows:

[0033] (1) Preparation of mixed solvent: Weigh isopropanol 55.25g, n-butanol 3.25g, hexanediol 3.25g, place in a stirring tank and stir, dissolve and mix well;

[0034] (2) add styrene acrylic resin 14g, dibutyl phthalate 0.5g, stir, fully dissolve;

[0035] (3) add polyamide wax 6900-20X 0.5g, stir and mix well;

[0036] (4) put 20g of graphite powder into the stirring tank, and stir to evenly mix;

[0037] (5) Transfer the uniform slurry in the stirring tank to the rolling mill, and roll the ball for 1 to 4 hours, and then pass through a 100-mesh sieve in a uniform graphite milky state, and package it.

Embodiment 3

[0039] Raw materials (mass percentage): graphite powder 16%, ethyl cellulose 4%, dibutyl phthalate 0.25%, hydroxy acrylate 0.25%, fumed SiO 2 0.5%, mixed solvent 79%. In the solvent, isopropanol 95%, hexanediol 1.25%, n-butanol 1.25%, propylene glycol methyl ether 1.25%, ethylene glycol 1.25%.

[0040] The preparation method is as follows:

[0041] (1) Preparation of mixed solvent: weigh 75.05g of isopropanol, 0.9875g of hexanediol, 0.9875g of n-butanol, 0.9875g of propylene glycol methyl ether, and 0.9875g of ethylene glycol, place in a stirring tank and stir, dissolve, well mixed;

[0042] (2) Add 4g of ethyl cellulose, 0.25g of dibutyl phthalate, 0.25g of hydroxyacrylate, stir, and fully dissolve;

[0043] (3) Add gas phase SiO 2 0.5g, stir and mix well;

[0044] (4) put 16g of graphite powder into the stirring tank, and stir until uniformly mixed;

[0045] (5) Transfer the uniform slurry in the stirring tank to the rolling mill, and roll the ball for 1 to 4 hours, a...

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PUM

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Abstract

The invention discloses a heavy water reactor fuel canning graphite emulsion paint and a preparation method thereof, and belongs to the technical field of preparation of paints. The paint consists of the following components in percentage by weight: 10-25 percent of graphite powder, 3-20 percent of low-temperature film former, 0.1-3 percent of dispersant, 0.1-2 percent of film forming auxiliary agent and 50-80 percent of mixed solvent. The graphite emulsion paint has the advantages of stable chemical property, uniform dispersion, no bubbling in coating, smooth coating and superior operability; and the coating calcined according to the construction requirements is compact and has high adhesion, superior wear-resistant performance and good lubrication.

Description

technical field [0001] The invention belongs to the technical field of coating preparation, and in particular relates to a heavy water reactor fuel cladding graphite emulsion coating and a preparation method thereof. Background technique [0002] CANDU type heavy water reactor adopts non-stop refueling and flexible refueling strategy, which can unload spent fuel or damaged fuel from the core without shutting down the reactor, which reduces the operating cost and avoids the long-term high radioactivity level of the main circuit. The unit operates safely and stably. [0003] During the operation of the reactor, the breakage of the fuel is an important factor affecting the safety of the reactor. A large number of operating data show that the causes of fuel damage mainly include two aspects, manufacturing damage and operating damage. The main manufacturing defects include fuel element end plug welding defects, end plug material pores, and excessive hydrogen content in the elem...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D125/14C09D101/26C09D129/04C09D163/00C09D7/12
Inventor 郭文利梁彤祥张勇
Owner TSINGHUA UNIV
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