JPS58208699A - Frp and high polymer laminate molding structure for shielding and controlling radiation - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 1. Overview Kobisho-mei consists in forming a structure by mixing and molding the raw materials (1) to (8) above with a thermosetting resin or a polymer resin, and particularly It uses boron, boric acid, and boric acid compounds.

The purpose is to effectively utilize the control and shielding of radiation sources and other items mentioned above.

Radiation and neutron beam leakage accidents have already occurred on the nuclear-powered ship Mutsu 1, and radiation exposure during maintenance and repair work due to the structure of nuclear power generation equipment allows radiation to be emitted into the building's proboscis, which has affected work efficiency. This not only hinders the use of radiation, but also causes costs to skyrocket, and the radiation exposure poses serious health management problems for these workers.

Radiation emitted into the atmosphere is also an issue that must be given serious attention. Radiation, which should be used for peaceful purposes, has negative effects on humans, animals and plants, and the public's trust has been lost. 4+ Being raped has become a social problem. In order to prevent these accidents, we would like to see a material that satisfies the following requirements: long-term contact resistance, complete shielding, and the ability to be easily formed into a structure!
, f'.

The material of this invention can be easily made into any structure, and its shielding/absorbing effect and control rate are extremely high, and unlike conventional thermoplastic resin materials, which cannot withstand radiation, deteriorate in quality, and gradually collapse after hardening. This phenomenon fully meets the expectations of the nuclear power industry. In addition, polymer resins would be very useful as protective equipment. 2. Basic matters regarding the material of this invention (1) The resin used for this material has a cross-linked polymeric molecular structure and also has a network structure. It has excellent resistance to radiation and is highly resistant to touch.

(2) The glass fiber used for laminating this material exhibits high strength and has the property of not becoming radioactive.

(3) In the melt resistance safety test of FRP, the acid and alkali resistance has a strength retention rate of 15 years. The record is currently being extended further.

(4) Semi-water or light water inside the reactor is completely H
It is 2O. When water protons and nee-trons are exposed to radiation, strong ionization occurs and penetrates the metals (currently used are stainless steel and others) that form nuclear reactors. As a result, the wall may become thin or pinholes may occur, leading to a radiation@leakage accident. Therefore, the penetration of radiation from nuclear power plant pipes and the like increases.

This material also has excellent corrosion resistance, so by using it, the incidence of accidents such as radiation leakage can be minimized.

(5) By mixing absorbing and shielding material into the resin, shielding and
It can be fully utilized for a wide range of purposes including absorption and control.

(6) Partly flexible polymer resins are important as radiation protection equipment and are fully useful.

3. Detailed explanation (1) A laminated and cured resin containing boron, boric acid, and a boric acid compound has the important effect of absorbing and enclosing neutrons, making the penetrating power disappear, and erasing the writing of neutrons. However, it exhibits extremely excellent properties as a neutron control material and a shielding material, contributing to the homogeneous digestion and reduction of fuels such as uranium hexafluoride and plutonium.

(2) Resin mixed with graphite, carbon powder, etc. and laminated and cured, and special metal fibers (poron, cadmium, magnox alloys, etc.), carbon powder, asbestos fiber, etc. are used as reinforcing materials to be laminated. Things are controlled by radiation.
Or it acts as an effective moderator.

(3) Products that mix lead (in the form of solid bodies, plates, scales, particles, powder) into resin and are laminated and cured in one piece work effectively in blocking radiation other than neutrons. , shielding
This material is suitable as an absorption control material.

(4) Various types of laminated materials such as those listed above may be molded singly and used according to their respective purposes, or they may be partially or completely laminated, bonded, coated, or lined to form an integrated material. None, each can be used for excursions to make effective use of it for multiple purposes.

(5) Those combined with glass fiber-reinforced plastics can also be used for liquids ionized by radiation, and can be used in areas that were previously considered extremely difficult.

The above-mentioned materials can be molded very freely, can be expanded to areas that cannot be processed with metal materials, and are flexible in terms of format selection. Furthermore, the effect of chlorinated paraffin and paraffin on polymer resin as fibers cannot be ignored.

To explain this with reference to Fig. 2, for example, glass fiber reinforced plastic (and polymer resin) 11 made by laminating resin mixed with graphite and carbon powder, and glass fiber reinforced plastic laminated by mixing resin with an acid compound. (Polymer resin) 12 and glass fiber reinforced plastic (and polymer resin) in which lead (in this example, plate-shaped pieces arranged alternately to form a labyrinth) are inserted and stacked in the resin.
18 are joined to form a single material, and melt-resistant galanu fiber □ reinforced plastic (and polymer resin) 10. '14
- The inner surface (right side of the figure) of the reinforced plastic (polymer resin) that is integrated as a whole is irradiated with α rays 8, β rays 4, riw 5,
This figure shows a state in which the neutron beam 6 is absorbed or blocked along the way and does not pass through to the outside.

In order to make it easier to understand, reinforced plastic plates (polymer resins) with various performance effects are bonded and integrated into one piece in the military zone. (-molecular resin) ↓
If you build it, it will be enough.

(7) Protons, (8) neutrons, and (9) electrons are easy-to-understand expressions of the atomic composition for each radiation.

Figure 3C shows an example in which when the material of the present invention is used as an absorbing/shielding material, the transmission distance (depth) of radiation can be changed by appropriately combining boron, chloride, graphite, etc. 16, 17, 18, 19 and 2, which are uncharged particles, are placed on the left side of the laminated molded plate 15, which is made by appropriately combining boron, lead, graphite, etc.
21.22.28
．． When 24 and 25 are irradiated, the former reaches the deep layer of the laminated molded plate and is absorbed and does not pass through, whereas the latter is absorbed immediately after entering the molded plate and does not pass through.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a pipe-shaped molded structure manufactured using the material of the present invention, FIG. 2 is an enlarged view of part a in FIG. 1,
FIG. 8 is a diagram showing that even if the same radiation is used, the depth of its penetration varies depending on the inappropriate allocation of raw materials. % Permit Yoshio Asanuma

Claims (1)

[Claims] The following raw materials (1) for glass fiber reinforced plastic FRP or polymer resin material: boron, boric acid, boric acid compound, and boron carbide (2)
) Graphite (3) Carbon and carbon fiber (4) Lead (plate, solid, scale, particulate, powder) and lead compounds (5) Silcaloid (same as above) (6) Magnox joints (Same as above) (7) Boron (
(8) Cadmium (4 F) mixed with 1. cow body, laminated and molded, combined with a combination of touch-resistant FRP or polymer resin with a reinforcing layer on the large surface, and a transverse rib as one piece. . 2. A combination of two or more types of laminated molded materials, each with a reinforcing layer on the surface.
It is a combination of LP or polymer resin that is laminated as a single unit (including cases in which two or more of the raw materials from (1) to (8) above are mixed and laminated), and is free from radiation (α, β, r/X).
laminated molded structural materials characterized by being used for the purpose of shielding, controlling, covering, moderating, absorbing, and melting-resistant neutrons (i and neutrons, etc.), and structural materials using materials listed in items 1 to 8 for lining or coating. .