JPS5839937A - Permeating flaw inspecting impregnant for atomic energy machinery parts - Google Patents

Abstract

PURPOSE:To discover defects of atomic energy machinery easily and also, to seal up defective parts, by using lead acrylate, iron acrylate etc. as main components of an impregnant and incorporating fluorescent material and hardening material etc. CONSTITUTION:A permeating flaw inspecting impregnant is composed of e.g. 45% lead acrylate, 25% boron acrylate, 5% lead oxide, 5% barium sulfate, 5% thallium oxalate, 0.01% oil color, 3% polyoxy propylene glycol, 2% tetraethylene glycol, 5% aluminum oxide and 5% diacrylate oligoethylene glycol phthalate. A large quantity of metallic compounds of iron, beryllium, lithium etc. is used other than said compounds of lead and boron in order to shelter from gamma-rays, hot neutron rays etc. The oil color is fluorescent material for deciding defective parts. This permeating flaw inspecting impregnant is hardened at a temperature higher than a certain temperature and the defective parts are sealed up by said impregnant.

Description

[Detailed Description of the Invention] Industrial technology is a technology that adds artificial elements to materials that exist in the natural world to produce new objects. Therefore, as a result of this development process, production technologies that meet human needs have naturally developed ahead of others. However, industrial products always have economic requirements, and are strongly required to have performance that satisfies certain requirements, and they are also required to reduce costs as much as possible.

For this reason, it is necessary to rationalize the production process, suppress waste materials, and utilize them in a sophisticated manner, while also ensuring the required performance. Demanding performance beyond what is required is a luxury for industrial products that are not artefacts, and that luxury should be used to reduce costs. Reliably implementing these 9' problems is the technological rationalization of industry and a contribution to the energy conservation that is currently being talked about.

This demand led to penetrant testing and impregnation. In other words, penetrant testing is a non-destructive testing method in academic terms.

Before it is used as an industrial product or material, it undergoes casting, forging, rolling, welding, cutting, etc., and each time it is processed into parts or other parts, its performance is inspected to see if it meets the requirements. We proceed with the process and create products in a rational manner without implementing unnecessary steps. In addition, even if the material is defective, it is now possible to use it without damaging the designed performance by injecting an impregnating agent into the material, taking into consideration the location where it will be used. To explain the significance of the present invention in more detail, there are three advantages.

One is that manufacturers of industrial products can use it for quality control, and can check for defective products at each step of the process. Second, when the orderer or user receives the finished product, they can inspect and process it to see if the product has the designed performance and can be used safely. Third, it is important for end users to check for defects (i.e., prevent dangers due to damage) during use of products, equipment, facilities, etc., and to eliminate accidents. As described above, the three methods are used to inspect nuclear equipment parts and their facilities, find defects, and seal them by impregnating them.

In the present invention, in order to enable sufficient visual inspection when inspecting defective parts, a fluorescent chemical substance or dye is mixed in to enable the defective parts to be clearly inspected and judged. The fluorescent substances used in the present invention include rhodashin red, oil color, thallium acrylate, quinoline derivatives, lutigenin, 4-dimethylaminoazobenzene, hydrazine 3-aminophthalate, luciferin, riboflavin, etc. Black Lie) (U'V) by mixing fluorescent substances
The defective part can be determined by using a lamp) or by visually observing the red or yellow color.

In addition, the purpose is to prevent disasters by detecting defects in nuclear equipment and their parts and sealing them to withstand the intended use and sealing out pollution rays (RM), thermal neutron beams, etc. from the defective parts. is. The special penetrating impregnation agent used in the present invention is intended for shielding against γ rays and neutrons, and generally speaking, elements with large atomic numbers are γ rays and neutrons.
Acrylic lead, to be effective in attenuating the line.
We use iron acrylate, etc. For neutrons,
Elements with large inelastic scattering cross sections attenuate neutrons into slow neutrons, and are said to be effective against pollution. Elements with small atomic numbers and large elastic scattering cross sections are also said to be effective in slowing down neutrons. It is theorized that when continuous neutrons become thermal neutrons and slow neutrons due to scattering, they are more easily absorbed by atomic nuclei. Applying this theory, the present invention can be applied to beryllium/umbrella, iron, lead, lithium, siliconium, bismuth, and boron. ,carbon,
A large amount of compounds such as hydrogen and fluoride are used. These elements are used singly or in the form of compounds.

Since the present invention is a penetrant impregnation agent, dyeing or fluorescent dye is included for the purpose of improving penetrating performance and inspection. A washing process is inevitably included as a process before inspection, but in the present invention, activators such as surfactants, nonyphenol, sonida alkyl sulfonate, and sodium laurate are mixed in so that washing is performed with water. doing. After washing, it is impregnated and sealed by hardening, but this has a structure that hardens due to the coexistence of acrylic acid, acrylic acid, etc.

In other words, it cures by radically integrating the esterification reaction of polybasic acid and polyhydric alcohol. When the humidity is above a certain level (80°O), the reaction starts within a few minutes, making polymerization possible.

We believe that if the method of the present invention is used in industry, it will have a lot of rationality and make a large contribution to energy conservation.6 In Japan, it has been used as a non-destructive testing method for about 25 years. Penetrant testing has been used. This method has many advantages and has been used to test metals, ceramics, wood, and all other materials and equipment. Assuming the composition of the penetrating liquid, the composition of the penetrating liquid is as follows: pheasant, alcohol, petroleum solvent, vegetable oil (soybean oil, rapeseed oil, sesame oil), surfactant, dye, etc. It was a penetrating liquid made by adding a dye) to make it red, or by adding Drycol Green (a fluorescent dye) instead of this oil color. These products have good permeability, but because they are solvent-based, they are very polluting and require a large amount of money to dispose of after washing. In addition, an oil color or dry coal green is added to a water-soluble penetrant solution (i.e., a penetrant solution made by adding a surfactant to polyethylene glycol or butanol so that it dissolves in water), and the color is checked visually or by irradiating it with a black light. It was possible to detect defective parts by emitting light color. Such penetrant testing fluids are expensive and require post-processing costs. The present invention greatly simplifies these drawbacks and also performs impregnation processing at the same time, so I think it is satisfactory in terms of labor costs, reduction in the number of steps, and safety. Moreover, the present invention aims to be applied to nuclear equipment parts and their equipment, and by preventing radiation leakage, it can be used more safely and at a lower cost.

By the method of the present invention, powder sintered metal products, ceramic products, cast products, and various other products can be impregnated with non-destructive testing, and radiation leakage can now be completely prevented.

Next, examples of the present invention will be described: Example 1 Lead acrylate (polymer) 45% boron acrylate (polymer) 25% lead oxide
5% Barium sulfate 5% Thallium formate 5% Oil color 0.01% Polyoxypropylene glycol 3% Tetraethylene glycol 2% Alumina oxide 5% Diacrylate oligoethylene glycol phthalate 5% Example 2 Iron acrylate (polymer) 35'% boron acrylate (polymer) 35% lead acrylate (polymer)
10% 0% thallium formate 10% triethylene glycol 5% azobisin butyronitrile 2% trimethylolpropane trimethacrylate 3% Example 3 Titanium acrylate-A (polymer) 35% lead acrylate (polymer) 35% boron acrylate (polymer) 10% thallium acrylate (polymer) 10% ethyl acrylate
2% Methyl acrylate 2% Ethylene glycol 2% Azobisisobutyronitrile 2% Diacrylate Oligoethylene Glyfur 7 Tallate 2% Example 4 Silinium acrylate (polymer) 10% Lead acrylate (polymer) 40% Acrylic Thallium acid (polymer) 20% glyoxal 5% sodium acrylate 5% propylene oxide 3% polypropylene glycol 7% polyoxyethylene-polyoxypropylene polyol 10% The polymerization initiators etc. described in the examples of the present invention are It has the purpose of increasing the effects of penetrant testing and impregnation processing, and has great advantages in processing the cleaning solution after use. The reason for this is that it hardens due to polymerization due to temperature or special light, so once it hardens, defective areas are marked and sealed. Also, by washing unnecessary parts with water, this liquid will harden in water or hot water. In cold water, it hardens in a few minutes by passing steam through it, so it is an epoch-making product that makes it possible to prevent pollution by filtering it.

Claims (1)

[Claims] A penetrant impregnation agent for nuclear equipment parts made by reacting lead acrylate, boron acrylate, thallium acrylate, and iron acrylate as main components with an oligoester acrylate system, that is, an oligomer system obtained by esterification of polyhydric alcohol. .