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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: 2013-10-16
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): 25% of graphite powder, 20% of thermoplastic acrylic resin, 1.5% of epoxy resin, 1.5% of fumed silica, and 52% of mixed solvent. In the solvent, isopropanol 90%, terpineol 5%, n-butanol 5%.

[0024] The preparation method is as follows:

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

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

[0027] (3) Add 1.5 g of fumed silica, stir and mix evenly;

[0028] (4) 25g of graphite powder is dropped into the stirring tank, stirred until uniformly mixed;

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

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%, hexanediol 5%, propylene glycol methyl ether 5%.

[0032] The preparation method is as follows:

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

[0034] (2) Add 14g of styrene-acrylic resin and 0.5g of dibutyl phthalate, stir and fully dissolve;

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

[0036] (4) 20g of graphite powder is dropped into the stirring tank, stirred until evenly mixed;

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

Embodiment 3

[0039] Raw materials (mass percentage): graphite powder 16%, ethyl cellulose 4%, dibutyl phthalate 0.25%, hydroxy acrylate 0.25%, gas phase 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, and place them in a stirring tank to stir, dissolve, well mixed;

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

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

[0044] (4) Graphite powder 16g is dropped in the mixing tank, stirs to mix evenly;

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

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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 paint preparation, and in particular relates to a heavy water reactor fuel cladding graphite emulsion paint and a preparation method thereof. Background technique [0002] CANDU-type heavy water reactor adopts non-stop refueling and flexible refueling strategies, which can discharge spent fuel or damaged fuel out of the core without shutting down the reactor, reducing operating costs and avoiding long-term high radioactive levels in the main circuit, ensuring The unit operates safely and stably. [0003] During the operation of the reactor, the damage 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 operation damage. The main manufacturing defects include welding defects of fuel element end plugs, pores in end plug materials, excessive hydrogen content in eleme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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