JP2001242288A - Radiation shielding material, and radiation shielding suit, radiation shield and radiation shielding equipment using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation shielding material protective against external radiation by lowering the transmission quantity of radiation such as α-ray, β-ray and neutron ray, to provide a radiation shielding suit and a radiation shield of high practicability reducing the quantity of exposure in working in high radiation environment, and to provide radiation shielding equipment prevented from malfunctioning by reducing damage caused by radiation. SOLUTION: This radiation shielding material for lowering the transmission quantity of α-ray, β-ray, neutron ray, X-ray and γ-ray comprises at least one element out of gadolinium, boron, lithium and indium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation shielding material for radiation protection using a radiation shielding material, a radiation shielding suit, a radiation shielding shield and a radiation shielding device using the same.

[0002]

2. Description of the Related Art When handling radiation, it is desirable not to be irradiated with radiation so as not to cause an obstacle due to the radiation. However, even in daily life, they receive natural radiation and radiation derived from medical practices. In addition, it is impossible to eliminate radiation exposure due to artificial radiation when working in radiation work. Exposure levels at which radiation injury is a concern depend on the International Commission on Radiological Protection (The In
internationalCommission on
Radiologic Protection (abbreviated as ICRP).
m permissible dose). Based on this recommendation, it imposes a legal obligation on the management of worker exposure. The maximum permissible dose in the recommendation is the maximum value only and does not mean that this dose may be exposed, but also recommends that all doses be kept as low as possible and avoid any unnecessary exposure. . Therefore, when engaging in radiation work, it is necessary to work hard and work efficiently. It is important to take appropriate protective measures as well as work efficiency.

Under normal and complete radiation control, an accident generally called a radiation accident should not occur. However, in reality, fires in facilities that hold radioactive materials, theft or loss of radioactive materials, exposure to radiation equipment failures, contamination of human bodies and facilities by radioactive materials,
It has not been possible to eliminate the occurrence of inadvertent exposure. For this reason, stakeholders are constantly striving to review the management system, improve equipment, and devise safe handling so as to eliminate the likely cause of the accident. However, it is essential to take measures to minimize the damage, as well as to maintain the safety of the human body.

[0004] Therefore, for the purpose of maintaining the safety of the human body,
Radiation shielding clothes using radiation shielding materials have been developed. Conventionally, for the purpose of protecting radiation, Tyvek or the like, or an object made of paper or resin has been used. These are designed not to take in radioactivity into the body than to shield radiation, that is, to prevent radiation from adhering to clothing or skin for the purpose of protecting the body from irradiation.

[0005]

Therefore, radiation shielding materials used in radioactive shielding clothes and the like can protect radiation, but radiation shielding materials that have been put into practical use for the purpose of shielding radiation and protecting against extracorporeal radiation have been developed. Did not.

There is an apron made of lead or the like for shielding radiation, that is, protection of extracorporeal irradiation. However, a radiation shielding material to which lead is applied is particularly effective for shielding X-rays having low energy of several tens KeV or less. Although the effect can be expected, the effect of shielding cannot be expected much with high energy. In particular, this radiation shielding material did not have the ability to shield neutrons generated by a nuclear reaction.

On the other hand, it is possible to increase the thickness of lead so as to have a sufficient shielding ability. However, in this case, a considerable thickness of lead is required. The radiation shielding clothing to which the material is applied has a problem that the weight is heavy and the workability is poor. In addition, even when actually made with a shielding block or the like, the weight becomes considerable. Radiation protective clothing is based on the premise that it can be worn and moved by humans. In fact, heavy and bulky objects are not used, and it was not practical to apply radiation shielding materials such as lead.

[0008] Radiation not only affects the human body but also adversely affects robots, monitoring equipment, and machines.
In particular, the electronic components have a problem in that the device is activated by neutrons, electrons are emitted, and the device performs an erroneous operation or the device is damaged.

The present invention has been made to solve such a problem, and provides a radiation shielding material capable of shielding radiation such as α-rays, β-rays, and neutrons and protecting against extracorporeal radiation. The purpose is to:

It is another object of the present invention to provide a radiation shielding suit and a radiation shielding shield which are highly practical and can reduce the exposure dose when working in a high radiation environment.

It is a further object of the present invention to provide a radiation shielding device in which damage due to radiation is reduced to prevent malfunction.

[0012]

Means for Solving the Problems The present inventors have conducted various studies in order to solve the above problems.

The damage to the human body due to radiation is evaluated based on the linear absorption coefficient Q based on the value of the biological effect ratio, and depends on how much energy the radiation has applied to a substance other than the human body and, conversely, is absorbed. Conceivable. The value of Q varies depending on the human body tissue or substance and the type of radiation. For X-rays, γ-rays and electrons for 1, neutrons, protons and particles with unknown energies of more than 1 atomic mass unit, 10 for particles of unknown energy, α-particles of unknown energy and multi-charged particles (and 2 for particles with unknown charge)
It is set to 0. More details are described in "Data for protection against extracorporeal radiation" published by Japan Isotope Association. Incidentally, the value of Q is set to 5 for thermal neutrons. That is, neutrons or alpha rays are
It is 5 to 20 times more susceptible to damage than X-rays or γ-rays.

Accordingly, the present inventors have conducted various studies on radiation shielding materials capable of shielding neutrons or α-rays that cause damage to the human body, and as a result, the present invention has been achieved.

That is, the radiation shielding material according to the first aspect is a radiation shielding material for reducing the transmission of α-rays, β-rays, neutron rays, X-rays and γ-rays, and comprises gadolinium, boron,
It is characterized by containing at least one element of lithium and indium.

In the present invention, gadolinium, boron and lithium in particular have a high absorption cross section for thermal neutrons. Also, indium has an absorption cross section up to medium-speed neutrons having higher energy than thermal neutrons. Gadolinium and indium are boron and (n, α) in the (n, γ) reaction.
Reacts and absorbs neutrons in the reaction. When these elements are applied, they can be almost absorbed if they have a thickness of about 100 microns. Cadmium as a neutron absorber also has a large absorption cross section for thermal neutrons, but is not specified in the present invention in consideration of the toxicity of elements and environmental aspects. In practice, these elements are used as compounds.
α-rays and β-rays can be sufficiently shielded by the thickness of these compounds. To shield X-rays and γ-rays, the higher the atomic number and the higher the density, the higher the shielding ability. Actually, if such a substance is made thicker, the shielding ability can be increased, but the weight is heavy, and when applied to a radiation shielding material, it becomes immobile. According to the present invention, it is possible to cope with large α-rays and neutron rays in which the value of the line absorption coefficient Q is 5 to 20 times higher than that of X-rays and γ-rays. It is a target.

According to a second aspect of the present invention, in the radiation shielding material according to the first aspect, at least one element of gadolinium, boron, lithium, and indium is:
It is characterized by being applied or impregnated on a resin sheet or cloth.

In the present invention, gadolinium, boron, lithium, and indium are formed on a resin or cloth serving as a base.
By applying or impregnating at least one or more elements, it is possible to affix it to a shielding cloth or shielding shield described later.

According to a third aspect of the present invention, in the radiation shielding material according to the second aspect, the resin sheet or cloth is made of polyester, nylon, cotton, polypropylene, acrylic fiber, vinyl, polyethylene, rubber, rayon, leather, Kevlar. , Aluminum carbon Kevlar, Gore-Tex, silicone, polyurethane or polyethylene terephthalate.

By using the material of the present invention for a resin sheet or cloth, clothes, sheets, and cloth can be prepared and can be stuck to a shield.

According to a fourth aspect of the present invention, there is provided the first or second aspect
In the radiation shielding material described, gadolinium, boron,
Lithium containing at least one element
Is gadolinium oxide Gd₂O₃Gadolinium gully
Umm Garnet Gd₃Ga₅O₁₂,gadolinium·
Ferrite GdFeO₃, Gd₃Fe₅O₁₂, Hydroxylation
Gadolinium Gd (OH)₃, Activated with cerium
Gadolinium iodate Gd₂SiO₅: Ce, Europium
Activated gadolinium borate GdBO₃: Eu, you
Gadolinium oxide Gd activated with lopium₂O₃: E
u, gadolinium sulfate Gd activated with europium
₂O₂S: Eu, europium activated aluminate
Gadolinium Gd₃Al₅O₁₂: Eu, europium
Activated gadolinium gallate Gd₃Ga₅O
₁₂: Eu, europium activated gado vanadate
Linium GdVO₄: Eu and cerium or black
Activated gadolinium gallate Gd₃Ga₅O
₁₂: Oxidized gadolin activated with Ce, Cr, terbium
Nium Gd₂O₃: Sulfuric acid activated with Tb, terbium
Gadolinium fluoride Gd₂O₂S: Tb, active in Praseodymium
Gadolinium sulfate Gd₂O₂S: Pr, Ter
Gadolinium Gallate Gd Activated with Bi ₃Ga
₅O₁₂: Ga aluminate activated with Tb and terbium
Dolinium Gd₃Al₅O₁₂: Tb, boron carbide B
₄C, boron nitride BN, boron phosphide BP, boron sulfide B
₂S₃, Boron phosphate BPO₄, Boron oxide B₂O₃, Reoxidized
Lithium Li₂O, lithium peroxide Li₂O₂, Aluminum
Lithium LiAlO₂, Lithium metaborate LiB
O₂, Lithium tetraborate Li₂B₄O₇, Germanic acid
Lithium Li₂GeO₃, Lithium molybdate Li₂
MoO₄, Lithium niobate LiNbO₃, Metasilicate
Lithium Li₂SiO₃, Lithium tantalate LiTaO
₃, Lithium titanate Li₂TiO₃, Lithium vanadate
Um LiVO₃, Lithium tungstate LiWO₄,
Lithium zirconate Li₂ZrO₃, Lithium nitride Li
₃N, lithium hydroxide LiOH.H₂O, methoxylith
Um LiOCH₃It is characterized by being.

According to a fifth aspect of the present invention, there is provided a radiation shielding suit which is worn when working in a high radiation environment and shields radiation. A main component of the radiation shielding suit covers substantially the entire body of the wearer. The radiation shielding material according to any one of claims 1 to 4 is used for all or a part of the components.

In the present invention, a radioactive shielding material having a shielding ability for α-rays, β-rays, and neutrons is formed into a sheet or cloth so as to cover almost the entire body of the wearer, and the radioactive material leading to internal exposure is exposed. In addition to preventing capture, external exposure can be reduced.

According to a sixth aspect of the present invention, there is provided the radiation shielding suit according to the fifth aspect, wherein the radiation shielding material according to any one of the first to fourth aspects is characterized in that the radiation shielding material is heat resistant clothing, cold clothing, gas proof clothing,
It is characterized by being sewn together with either the core material of either chemical resistant clothing or space suit and inner cotton.

In the present invention, the following effects can be obtained by sewing the radiation shielding material together with the core material of any one of heat-resistant clothes, cold-proof clothes, gas-proof clothes, chemical-resistant clothes, and space suits and inner cotton.

In the case of a heat-resistant garment, it has both a radiation shielding ability and a heat-resistant ability, and can cope with a fire in a radiation handling facility. In the case of winter clothing, it has both radiation shielding ability and winterization ability, and can cope with an accident in a cold area or a winter in a radiation handling facility. In particular, it can be used effectively for security and evacuation guidance around the surrounding monitoring area.

In the case of the gas proof clothing, the radiation shielding ability and the gas proofing ability are combined to cope with a case where toxic substances are generated simultaneously in an accident at the radiation handling facility. It can also be used in the event of an accident at a radiation handling facility, when chemicals such as acids and alkalis are scattered, and when chemicals must be handled as an emergency measure.

Further, by sewn together with the core material and the inner cotton of the space suit, the radiation shielding ability including cosmic rays and the cold protection ability are provided, so that the exposure amount of the worker in the space can be reduced and the allowable working time can be increased. Can be made possible.

According to a seventh aspect of the present invention, in the radiation shielding clothing according to the fifth aspect, when the radiation shielding material according to the first aspect is applied or impregnated on a resin sheet or cloth, sewing is performed with a thread. It is characterized by being manufactured by bonding.

In the present invention, when the radiation shielding material is applied or impregnated on a resin sheet or cloth, the radiation shielding material is produced by bonding without sewing with a thread. Accordingly, it is possible to prevent the penetration of radioactivity from the hole and the tearing from the hole without leaving a hole in the sewing machine with the needle.

The invention according to claim 8 is the radiation shielding suit according to claim 5, further comprising a face mask or eyeglasses for protecting the face or eyes of the wearer, and the face mask or eyeglasses is provided with transparent glass and crystal. Characterized in that the radiation shielding material is used.

In the present invention, the radiation-shielding clothing is provided with a face mask or eyeglasses for protecting the face or eyes, and the radiation-shielding material is used as the material, thereby alleviating the damage to the lens of the face and eyes due to radiation. Can be.

According to a ninth aspect of the present invention, there is provided the radiation shielding suit according to the eighth aspect, wherein borosilicate glass, gadolinium oxide, gadolinium gallium garnet, cadmium selenide, gadolinium silica osmium are used as transparent glass and crystal radiation shielding materials. And gadolinium molybdate, and a radiation shielding material obtained by coating the transparent resin according to claim 3 with a substance containing at least one or more elements of gadolinium, boron, and lithium according to claim 4. It is characterized by the following.

By using the radiation shielding material of the present invention,
Face masks or eyeglasses can be made that allow the wearer to see the outside from the inside.

According to a tenth aspect of the present invention, there is provided a radiation shielding shield for shielding radiation used when working in a high radiation environment, wherein a main component covers substantially the entire body of the worker, The radiation shielding material according to any one of claims 1 to 4 is entirely or partially used.

According to the present invention, since the body is shaped so as to cover the entire body of the worker, it can protect the body from irradiating and, at the same time, can protect the body from radiation with α-ray, β-ray and neutron radiation. By using it as a material, it is possible to protect extracorporeal radiation, particularly, since it is possible to shield α rays and neutrons with high values of the X-ray absorption coefficient Q and reduce the amount of transmission of X-rays and γ-rays, and External exposure can be reduced.

An eleventh aspect of the present invention is the radiation shielding shield according to the ninth aspect, wherein the shield is provided with a caster and a handle.

By providing the radiation shield with casters and handles, the shield can be easily moved even when the shield is heavy.

According to a twelfth aspect of the present invention, in the radiation shielding shield according to the tenth aspect, when the radiation shielding material according to the first aspect is applied or impregnated on a resin sheet or cloth, sewing is performed with a thread. It is characterized by being produced by bonding without any.

In the present invention, when the radiation shielding material is applied or impregnated on a resin sheet or cloth, the radiation shielding material is manufactured by bonding without sewing with a thread. This makes it possible to prevent the penetration of radioactivity through the hole and tearing from the hole without leaving a hole in the sewing machine with the needle.

According to a thirteenth aspect of the present invention, there is provided a radiation shielding device wherein the radiation shielding material according to any one of the first to fourth aspects is adapted to a robot, a monitoring device, or other devices.

In the present invention, the radiation shielding material is adapted to extreme robots and the like, and damage and malfunction of electronic devices and driving devices are caused by α rays and electrons generated by (n, α) reaction, (n, γ) reaction and the like. Can be prevented.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the radiation shielding material of the present invention,
A shield clothing and shield using the same material will be described with reference to FIGS.

FIGS. 1A and 1B are diagrams showing the structure of a radiation shielding suit, wherein FIG. 1A shows a type covering the whole body, FIG. 1B shows a type covering partly, and FIG. 1C shows a type sewn into general clothes. 1 shows a radiation shielding suit.

The radiation shielding suit 1 shown in FIG. 1A has a heat-resistant function, a cold-proof function, a gas-proof function, and a chemical-resistant function, and is combined with a space suit. As shown in FIG. 1 (a), the whole body of the worker is completely covered with a cloth 2 containing a radiation shielding material, and on the back of the worker, oxygen inhalation and temperature control for internal oxygen inhalation and temperature adjustment are performed. An adjusting mechanism 3 is provided. Further, a face mask 4 is provided on the head of the worker, and the face mask 4 has a peeping section 5 through which the worker can see the outside from the inside.

FIG. 1 (b) shows a type in which a part is covered, and a hat 6, a mask 7, a link (or white coat) 8, and a glove 9 each include a radiation shielding material. Although not shown in FIG. 1 (b), the face mask 4 including the radiation shielding material shown in FIG. 1 (a) is also a radiation shielding suit that covers every part, and also includes eyeglasses, pants or socks. It is mentioned as a radiation shielding suit to cover every time.

FIG. 1 (c) shows a type of sewing on ordinary clothes, for example, clothes such as police officers and guards. As shown in FIG. 1C, a radiation shielding material is sewn into each of the helmet 10, the winter clothing (or jumper, coat, etc.) 11, and the winter pants 12.

Each of the types (a), (b) and (c) shown in FIG. 1 can be used properly depending on the place of use, radiation dose, danger other than radiation, and the like. Note that (b) is more heavy than (c) and (a) is more heavy than (b), which corresponds to a situation where the use is more dangerous.

FIG. 2 shows details of a radiation shielding material applied to the radiation shielding clothing 1 shown in FIG.

As shown in FIG. 2A, the material 13 is composed of a radiation shielding material 14 and a resin or cloth 15 of a protective film formed on a base coated on the radiation shielding material 14.

Polyester was used as the resin sheet or cloth 15 and gadolinium oxide Gd ₂ O ₃ was used as the radiation shielding material 14. Note that, other than polyester, nylon, cotton, polypropylene, acrylic fiber, vinyl, polyethylene, rubber, rayon, leather, Kevlar, aluminum carbon Kevlar, Gore-Tex, silicone, polyurethane, polyethylene terephthalate, and the like can be used.

The shielding ability when gadolinium oxide Gd ₂ O ₃ is used as the radiation shielding material 14 shown in FIG. Here, a brief explanation will be given of the degree of shielding ability particularly for thermal neutrons.

It is assumed that the thickness of the radiation shielding material 14 shown in the cross section of FIG. Assuming that the linear absorption coefficient of Gd ₂ O ₃ is μ, the linear absorption coefficient can be obtained from the following equation from the density ρ of the substance, the Avogadro number N, the total sectional area σ, and the number of atoms A.

[0054]

Μ = ρ · N · σ / A As a result, μ = 1243.8 cm ⁻¹ . Considering the particle density and the density when attaching or coating,
When calculated as an average 70% density, the transmission amount is e (−μt)
Is required. Assuming that the thickness t of the radiation shielding material 14 is 100 microns, the transmission amount e (−1243.8 * 0.7 *)
0.01) = 0.000165, which is about 1.7 / 10,000. The range showing the transmission ratio of α-rays and β-rays in 100 microns is smaller than that of thermal neutrons, and can be sufficiently shielded.

If an appropriate shielding thickness is selected by the radiation shielding material 14 in consideration of the absorption coefficient, other materials can be used on the same principle using a substance containing an element such as gadolinium, boron or lithium. .

As another material, for example, gadolinium
Gadolinium oxide Gd₂O₃, Mo
Dolinium gallium garnet Gd₃Ga
₅O₁₂, Gadolinium ferrite GdFeO₃, G
d₃Fe₅O₁₂, Gadolinium hydroxide Gd (O
H)₃Gadolinium silicate activated with cerium
₂SiO₅: Ce, gallium borate activated by europium
Linium GdBO₃: Eu activated with europium
Gadolinium oxide Gd₂O₃: Eu, active in europium
Gadolinium sulfate Gd₂O₂S: Eu, you
Gadolinium aluminate Gd activated with lopium₃A
l₅O₁₂: Eu, gallium activated with europium
Gadolinium acid Gd₃Ga₅O₁₂: Eu, Europiu
Activated gadolinium vanadate GdVO₄: E
u, and gallium activated with cerium or chromium
Gadolinium acid Gd₃Ga₅O₁₂: Ce, Cr, tell
Gadolinium oxide Gd activated with Bi₂O₃: T
b, gadolinium sulfate Gd activated with terbium₂
O₂S: sulfated gadolin activated with Tb, praseodymium
Nium Gd₂O₂S: Gas activated with Pr, terbium
Gadolinium lithate Gd₃Ga₅O ₁₂: Tb, Ter
Gadolinium aluminate Gd activated with Bi₃Al
₅O_{1 2}: Tb or the like can be applied.

As a substance containing boron, boron carbide B
₄ C, boron nitride BN, boron phosphide BP, boron sulfide B
₂ S ₃ , boron phosphate BPO ₄ or boron oxide B ₂ O ₃ can be applied.

Further, substances containing lithium include lithium oxide Li ₂ O, lithium peroxide Li ₂ O ₂ , lithium aluminate LiAlO ₂ , lithium metaborate LiB
O ₂ , lithium tetraborate Li ₂ B ₄ O ₇ , lithium germanate Li ₂ GeO ₃ , lithium molybdate Li ₂
MoO ₄ , lithium niobate LiNbO ₃ , lithium metasilicate Li ₂ SiO ₃ , lithium tantalate LiTaO
₃ , lithium titanate Li ₂ TiO ₃ , lithium vanadate LiVO ₃ , lithium tungstate LiWO ₄ ,
Lithium zirconate Li ₂ ZrO ₃ , lithium nitride Li
₃ N, lithium hydroxide LiOH.H ₂ O, and methoxylithium LiOCH ₃ can be used.

Although X-rays and γ-rays are so thin that they can hardly be shielded, but if the thickness is further increased, a certain shielding effect can be expected especially in the X-ray region with low energy.

FIG. 2 (b) is a diagram showing details of the fabric of the radiation shielding suit shown in FIG. 1 (a).

As shown in FIG. 2B, a special cloth 16 such as a heat-resistant function, a cold-proof function, a gas-proof function, a chemical-resistant function or a space suit and a lining or a core 17 are provided outside the material 13 shown in FIG. The material 13 is sewn together with the core 17 and the inner cotton. The material 13 shown in FIG. 2A may be bonded to the radiation shielding material 14.

Next, a radiation shielding shield using the radiation shielding material 14 is shown in FIG. FIG. 3A shows a perspective view of the shield,
FIG. 3 (b) shows a cross-sectional view of the shield.

As shown in FIGS. 3A and 3B,
A caster 19 for facilitating movement is provided at a lower position of the shield 18, and a handle 20 is provided at the rear center of the shield 18 as shown in FIG. The provision of the casters 19 and the handle 20 makes it easier to carry a heavy material as a shielding material. In particular, as a shielding material of the radiation shielding shield 18, a material containing a neutron moderator may be used as described later.

FIG. 4 shows the details of the radiation shield 18 of FIG. 3 and shows the detailed configuration of the radiation shield including a neutron moderator.

As shown in FIG. 4, a radiation shielding material 22 is provided outside a neutron moderator 21 containing a large amount of hydrogen, and a resin 23 is formed outside the radiation shielding material 22.

The radiation shielding shield 18 made of such a material
In the neutron moderator 21 containing much hydrogen, fast neutrons having higher energy than thermal neutrons are decelerated to thermal neutrons,
Neutrons can be shielded by absorbing thermal neutrons with the radiation shielding material 22 like the radiation shielding material 22 described with reference to FIG. It has been calculated that when water is used as a moderator containing hydrogen, approximately 3 cm will become almost thermal neutrons. When the radiation shielding shield 18 is large enough to cover a person, the weight becomes considerable. For this reason, FIG.
As shown in (b), a caster 19 is provided to facilitate carrying. Although the weight is heavy, the radiation shielding material 22 of the shielding shield 18 may be made of lead or tungsten having a high atomic number and a high X-ray or γ-ray shielding ability.

The radiation protective clothing conventionally used has been functioning for the purpose of protecting radioactive incorporation as an internal exposure, but has little ability to shield radiation as an external exposure, thus reducing the time required for safe operation. However, according to the present embodiment, the radiation shielding clothing 1 and the radiation shielding shield 18 are used as protective clothing, particularly, neutrons and radiation that has a large line absorption coefficient such as α-ray and is easily damaged. It is possible to reduce the exposure of workers and to secure working hours in an emergency. In particular, in the event of an accident in a facility that handles radiation, not only radioactivity and radiation leakage but also fire, explosion, and scattering of chemicals may be involved, so use in combination with these protective clothing This increases safety. In addition, when considered as work clothes, the radiation shielding material is not practical if it is heavy and cannot move. However, the radiation shielding material of the present embodiment has a shielding ability against radiation that particularly damages humans. And reduce the overall weight. In particular, by using a heavy shield having a higher shielding capability in combination with a shielding shield, it is possible to ensure both workability and reduced exposure.

It is to be noted that such a radiation shielding material is applied not only to the shielding clothes 1 and the shielding shield 18 prepared for the purpose of protecting a person, but also to the robot, a monitoring device, and a machine. It is effective even if it is applied to such as. In particular, in the case of electronic components, it is possible to prevent neutrons from radiating equipment and causing electrons to behave incorrectly or break in some cases, and to prevent radiation from hitting the image sensor, such as cameras, etc. Can be prevented. By adding a radiation shielding material to these devices, it is possible to operate the devices safely and extend the life. In addition, these protective equipment can be used not only when responding to an accident, but also beforehand to help reduce radiation exposure in the event of an accident.
Damage can be reduced.

[0069]

As described above, according to the radiation shielding material of the present invention, radiation can be shielded and the weight can be reduced. can get. In particular, by using an object that is heavy due to its increased shielding ability, it can be used in combination as a shielding shield to enhance the shielding effect and reduce the exposure and secure a long working time. Furthermore, by applying radiation shielding clothing and shielding shields not only to humans but also to robots, monitoring equipment, and machines, it is possible to prevent electronic components from radiating and causing erroneous operation or breakage, and to be used in imaging devices such as cameras. The radiation can be prevented from hitting and damaging.

[Brief description of the drawings]

FIGS. 1A and 1B are diagrams showing a radiation shielding suit according to an embodiment of the present invention, wherein FIG. 1A shows a type that covers the whole body of the shielding clothing containing a radiation shielding material, and FIG. (C) shows a type of sewn into general clothing of shielding clothing including a radiation shielding material.

2A is a diagram illustrating a basic configuration of a radiation shielding material, and FIG. 2B is a diagram illustrating a configuration of a material obtained by combining a radiation shielding material with a special material in the embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a radiation shielding shield using a radiation shielding material including a neutron moderator according to the embodiment of the present invention.

FIG. 4 is a diagram showing a detailed configuration of the radiation shielding shield shown in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Radiation shielding clothing 2 Fabric containing radiation shielding material 3 Oxygen inhalation / temperature adjustment mechanism 4 Face mask 5 Peeping part 6 Prevention 7 Mask 8 Tie (or white coat) 9 Gloves 10 Helmet 11 Winter clothing (or jumper, coat) 12 Winter pants Reference Signs List 13 material 14 radiation shielding material 15 resin or cloth 16 special cloth 17 lining or core 18 shielding shield 19 caster 20 handle 21 neutron moderator 22 radiation shielding material 23 resin

Claims (13)

[Claims] 1. A radiation shielding material for reducing the transmission of α-rays, β-rays, neutron rays, X-rays and γ-rays, wherein at least one of gadolinium, boron, lithium and indium is used.
A radiation shielding material comprising at least one element. 2. The radiation shielding material according to claim 1, wherein at least one or more of gadolinium, boron, lithium and indium are applied or impregnated on a resin sheet or cloth. Radiation shielding material. 3. The radiation shielding material according to claim 2, wherein the resin sheet or cloth is made of polyester, nylon, cotton, polypropylene, acrylic fiber, vinyl, polyethylene, rubber, rayon, leather, Kevlar, aluminum carbon Kevlar, GORE-TECH. Radiation shielding material, characterized in that the radiation shielding material is made of water, silicone, polyurethane or polyethylene terephthalate. 4. The radiation shielding material according to claim 1 or 2.
Of gadolinium, boron and lithium
The substance containing at least one element is gadolinium oxide G
d₂O₃, Gadolinium, Gallium, Garnet Gd₃
Ga₅O₁₂, Gadolinium ferrite GdFe
O₃, Gd₃Fe₅O₁₂, Gadolinium hydroxide Gd
(OH)₃Gadolinium silicate activated with cerium
Gd₂SiO ₅: Ce, europium activated boric acid
Gadolinium GdBO₃: Eu activated by europium
Gadolinium oxide Gd₂O₃: Eu, europium
Activated gadolinium sulfate Gd₂O₂S: Eu,
Gadolinium aluminate Gd activated with europium
₃Al₅O₁₂: Eu, gallium activated with europium
Gadolinium oxalate Gd₃Ga₅O₁₂: Eu, Euro
Pd activated gadolinium vanadate GdV
O₄: Activated with Eu and cerium or chromium
Gadolinium gallate Gd₃Ga₅O₁₂: Ce, C
r, gadolinium oxide Gd activated with terbium₂O
₃: Tb, gadolinium sulfate activated with terbium
Gd₂O₂S: Sulfation activated by Tb, praseodymium
Gadolinium Gd₂O₂S: Pr, activated by terbium
Gadolinium gallate Gd₃Ga ₅O₁₂: T
b, gadolinium aluminate G activated with terbium
d₃Al₅O₁₂: Tb, boron carbide B₄C, boron nitride B
N, boron phosphide BP, boron sulfide B₂S ₃, Boron phosphate BPO
₄, Boron oxide B₂O₃, Lithium oxide Li₂O, peroxide
Lithium Li₂O₂, Lithium aluminate LiAl
O₂, Lithium metaborate LiBO ₂, Lithium tetraborate
Li₂B₄O₇, Lithium germanate Li₂Ge
O₃, Lithium molybdate Li₂MoO₄, Niobate
Lithium LiNbO₃, Lithium metasilicate Li₂SiO
₃, Lithium tantalate LiTaO₃, Lithium titanate
Li₂TiO₃, Lithium vanadate LiVO₃, Ta
Lithium ungstenate LiWO₄, Lithium zirconate
Li₂ZrO₃, Lithium nitride Li₃N, Lithium hydroxide
LiOH ・ H₂O, methoxylithium LiOCH₃so
A radiation shielding material, characterized in that there is. 5. A radiation shielding suit worn when working in a high radiation environment to shield radiation, wherein a main component of the radiation shielding suit covers almost the entire body of the wearer, and all of the components are provided. A radiation shielding suit, wherein the radiation shielding material according to any one of claims 1 to 4 is partially used. 6. The radiation shielding suit according to claim 5,
A radiation shielding material according to any one of claims 1 to 4, which is sewn together with a core material of any of heat-resistant clothes, cold-proof clothes, gas-proof clothes, chemical-resistant clothes or space suits, and cotton. Radiation shielding suit. 7. The radiation shielding suit according to claim 5,
A radiation-shielding garment, characterized in that when the radiation-shielding material according to claim 1 is applied or impregnated on a resin sheet or cloth, the radiation-shielding clothing is produced by bonding without sewing with a thread. 8. The radiation shielding suit according to claim 5,
A radiation shielding suit having a face mask or eyeglasses for protecting a wearer's face or eyes, and using a transparent glass and crystal radiation shielding material for the face mask or eyeglasses. 9. The radiation shielding suit according to claim 8,
As a radiation shielding material of transparent glass and crystals, borosilicate glass, gadolinium oxide, gadolinium gallium garnet, cadmium selenide, gadolinium silica osmium, gadolinium molybdate are used, and the transparent resin according to claim 3, Item 6. A radiation shielding suit, wherein a radiation shielding material coated with a substance containing at least one of gadolinium, boron and lithium is used. 10. A radiation shielding shield for shielding radiation used when working in a high radiation environment, wherein a main component covers substantially the entire body of the worker, and all or a part of the component is charged. Item 5. A radiation shielding shield using the radiation shielding material according to any one of Items 1 to 4. 11. The radiation shielding shield according to claim 9, wherein the shield is provided with a caster and a handle. 12. The radiation shielding shield according to claim 10, wherein when the radiation shielding material according to claim 1 is applied or impregnated on a resin sheet or cloth, the radiation shielding material is produced by bonding without sewing with a thread. A radiation shielding shield characterized in that: 13. A radiation shielding apparatus characterized in that the radiation shielding material according to any one of claims 1 to 4 is applied to a robot, a monitoring device, or another device.