KR100733791B1 - radiation shielding wall - Google Patents

Abstract

According to the present invention, the thickness of the concrete wall can be reduced while maintaining the shielding force of the radiation by filling a light or easy-to-carry iron hole or soft hole in the inside of the concrete wall when manufacturing the radiation shielding wall. Iron shield plate and soft block which are bent and aligned at an angle, and iron block and soft block which form a bend on the laminated surface alone or a combination thereof to form a shielding layer to improve the shielding power and to store the radiation waste treatment and The present invention relates to a radiation shielding wall capable of preventing external leakage of radiation and facilitating the installation of a radiation disposal tank by filling iron holes or soft holes in concrete walls or steel barrels constructed for storing radioactive materials.

Radiation, metalworking, ironworking, softening, steel structure

Description

Radiation shielding wall

Figure 1a is a structural diagram of a conventional radiation shielding wall.

Figure 1b is an exploded perspective view of a conventional radiation shielding wall.

2-11 are views of a radiation shielding wall in accordance with embodiments of the present invention.

Explanation of the main symbols in the drawings

100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 100i, 100j: radiation shielding wall

111: concrete wall 113: door

120: metal ball 130: neutron blocker

140: steel structure 150: engraving

160: block 170: polyester film

The present invention relates to a radiation shielding wall, and more particularly, to manufacture a radiation shielding wall, a shielding force of radiation is filled by filling a steel ball or lead ball that is relatively light and easy to transport inside the concrete wall. It is possible to reduce the thickness of the concrete wall, while maintaining the iron or plate and the iron block and the soft block and the iron block and the soft block forming the bend on the lamination plane and the lamination plane and the slant cut and aligned in the longitudinal direction alone or their Combination forms a shielding layer, and fills iron or soft air inside the concrete walls or steel barrels that are constructed for the storage of exposed radioactive waste or storage of radioactive material, thereby preventing external leakage of radiation and facilitating the installation of a radiation disposal tank. It relates to a radiation shielding wall that can be made.

Radioactive ray refers to particle rays and radiations emitted when a radioactive element decays. More specifically, it refers to alpha rays, beta rays, and gamma rays emitted as a radionuclide decays. It includes particle beams and electromagnetic waves generated by various reactions.

Such radiation has been used for the diagnosis and treatment of diseases, especially in the case of gamma rays has shown a significant effect in the treatment of cancer.

It is also used to effectively sterilize various medical products (syringes, surgical sutures, compression bandages, etc.).

However, when radiation is irradiated above a certain amount, acute or chronic radiation disorders may occur, and genetic mutations may occur.

Therefore, in buildings where radiation leakage is concerned, such as nuclear power plants and hospitals, the corresponding walls should be constructed as radiation shielding walls to prevent radiation leakage.

Conventional technology for solving this problem is known from the Utility Model No. 199121. Looking at the conventional radiation shielding wall structure with reference to the drawings as follows.

Figure 1a shows a radiation shielding wall structure according to the prior art, Figure 1b is an exploded perspective view of the shielding wall structure according to the prior art.

The conventional radiation shielding wall 10 is constructed using concrete having a high radiation shielding rate. In order to further increase the radiation shielding rate, the shield 12 is embedded in the concrete pouring portion 11 as shown in the drawing. Will be installed.

The shield 12 is made of steel and includes a plurality of vertical frames 13, a horizontal frame 14, and a shield plate 15.

The vertical frame 13 is composed of two channel-type steels, and the grooves are positioned to face each other in parallel while being spaced apart from each other by a predetermined distance.

In addition, a plurality of welding holes 13a are drilled in the groove bottom surface of the channel-type steel to have a predetermined distance in the longitudinal direction.

The horizontal frame 14 is a flat iron having a predetermined width and a thickness thinner than the width, and is positioned between the two channel steels, and both ends thereof are respectively coupled to the protrusion of the channel steel, and a plurality of the horizontal frames 14 are predetermined in the longitudinal direction of the channel steel. Combined to have a separation distance of.

The shielding plate 15 is formed to be inserted into a plurality of spaces formed by the vertical frame 13 and the horizontal frame 14, the fastening piece 15a through which a fastening hole 15b having a predetermined diameter passes. It is formed to protrude from both ends of the upper.

The shield plate 15 is accommodated to overlap each other in the space, and welded through the welder so that no flow is generated in the accommodated state.

The radiation shielding wall structure having the above-described structure is provided with the shielding plate 15 after fixing and installing the frames formed by the vertical and horizontal frames 13 and 14 before concrete pouring. When storing, the wire is passed through the fastening hole 15b and then the plurality of shielding plates 15 are accommodated so as to overlap each other using a crane or the like.

When the housing of the shielding plate 15 is completed, the both sides of the shielding plate 15 are welded through the welding hole 13a to complete the shielding body 12, and then cast concrete outside the shielding body 12 to shield the radiation. Complete the construction of the wall (10).

However, the conventional radiation shielding wall structure requires the use of a separate crane or the like to lift a heavy shielding plate in order to insert a shielded plate having a predetermined thickness and inserting a lead shielding plate into the concrete wall. There was a problem that the time delay and the installation of the shield plate is difficult.

In the manufacturing of a conventional radiation shielding wall, a method of pouring molten lead into a hexahedral structure inside a concrete wall and cooling is used, but air bubbles are generated as the molten lead is hardened, causing radiation penetration and penetration. There was a problem.

In addition, when the lead plate (lead plate) is used as a conventional radiation shielding wall, the construction is difficult because the soft plate is formed relatively thick, there is a problem that the manufacturing cost and construction cost increases because the number of the soft block must be prepared .

The present invention has been made to solve the above problems, in order to have a shielding power to the radiation irradiated to the concrete wall, such as a metal ball (lead ball) or steel ball (steel ball) having a predetermined diameter inside the concrete wall By filling the ball, it is relatively lighter than the conventional plate-shaped shielding wall, so it is easy to transport and fill between the concrete walls, and inside the concrete wall filled with soft or iron holes to increase the shielding force and reduce the concrete wall thickness for the same shielding force. It is possible to arrange the iron engraving plate and the soft engraving plate and the iron block and the lead block alone or in combination thereof, and to sculpt them so that the contact surface is inclined at the time of alignment so that the transmittance of radiation is extremely reduced, and steel or stainless steel Liquid paraffin or poly filling the metal hole inside the shielding door Curing the styrene after filling and at the same time blocking of the neutron radiation to provide a radiation shield to a wall the thickness of the door it is an object.

In order to achieve the above object, the present invention constructs a floor, a wall, and a ceiling with a concrete wall to seal an internal space, and in a concrete structure having a door made of steel or stainless steel to open and close one side of the concrete wall, the concrete The purpose of the present invention is to provide a radiation shielding wall that is easy to transport and handle when the metal and spherical metal holes are filled in the walls and doors to block the transmission of radiation.

In addition, the concrete wall filled with the metal ball according to the present invention, the iron block and the soft block formed to be bent to the iron piece plate and the soft piece plate and the stacked parts are cut diagonally in the longitudinal direction staggered with the irradiation direction of the radiation therein It is an object to increase the shielding power of the radiation by individually or in combination with a metal ball, respectively.

In addition, the metal ball according to the present invention is characterized in that the inside of the shielding door made of steel or stainless material is mixed with a neutron blocker, which is cured in a liquid state, so as to thin the thickness of the door while blocking the transmission of neutrons.

In addition, the metal ball according to the present invention is characterized by increasing the reinforcement by being filled with the reinforcement is placed inside for the reinforcement of the concrete wall, it is characterized in that it blocks the radiation.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 to 11 are diagrams of a radiation shielding wall according to embodiments of the present invention.

As shown in FIG. 2, the radiation shielding wall 100a according to the first embodiment of the present invention includes a concrete wall 111 constituting a floor, a circumference, and a ceiling of a building, and an interior of the concrete wall 111. It is made of a metal hole 120 is filled with a spherical metal material to block the transmission of radiation.

Here, the radiation refers to X-rays, gamma rays, beta rays, neutrons and alpha rays.

The metal ball 120 is made of steel or lead material.

At this time, since the metal ball 120 is formed in a spherical shape and the concrete wall 111 is piled up and simply poured between them, the shielding wall is completed, and thus the weight is less than that of the shielding plate having a relatively large surface area for easy handling. It takes up less space for storage than the shield.

Hereinafter, as shown in Table 1, the experimental data showing the degree of shielding of the metal hole 120 according to the present invention will be described.

In other words, the experimental data are made of lead and steel, which are generally used as shielding materials, and formed in the shape of balls and plates in each case. In each case, the half-layer (Half-) was irradiated with X-rays of 4MV, 6MV, and 10MV. Value Layer).

At this time, the half-layer (HVL, χ _1/2 ) refers to the shielding thickness required to reduce the intensity of the radiation by half.

의 계산식에 의해 도출된다.In particular, the half-layer is

It is derived by the formula of.

Where μ represents the linear attenuation coefficient (cm ⁻¹ ) in the shielding material.

Test Methods

In order to proceed the present invention, the diameters of the lead and iron balls, which are metal balls 120, were produced in sizes of 2.0 to 2.5 mm and 1.5 to 2.0 mm, respectively. Made with.

Moreover, the rectangular parallelepiped cylinder was produced with the acryl plate of thickness 4.5mm for the purpose of filling the said lead hole and the iron hole.

At this time, the inner cross-sectional area of the tube is 10.0 cm * 10.0 cm, the interval between each of the lead and iron holes filled in the acrylic plate is 0.5 ~ 5 cm.

Lead or iron holes were chopped into the barrel, and a dose-determination film was placed at a position 70 cm away from the barrel, and 6 MV X-rays were radiated.

The distance is set at a distance of 70cm to prevent the contrast of the radiograph deteriorated by the electrons and scattering lines generated in the metal hole 120.

Half-layers of the metal holes 120 filled with air in the voids between the metal holes 120 in the cylinder were measured for 4MV, 6MV and 10MV X-rays.

In this case, Clinac-4 / 100 (Varian, USA) was used as a generator of 4MV X-ray, and Clinac-2100C (Varian, USA) was used as a generator of 6MV and 10MV X-ray.

The radiation detector used a Farmer Ion box.

The distance from the metal ball 120 to the source and the distance to the ion chamber were all 70 cm, and the size of the irradiation surface was 5.5 cm * 5.5 cm at the position of the radiation detector.

On the other hand, the density of the metal ball 120 mixed with air by measuring the weight of the lead (M _{mtl + acr} ) and the empty cylinder (M _acr ) filled with lead or iron ball in the cylinder, and calculate the volume (V) of the cylinder (Density, ρ) is shown numerically in Table 1.

That is, ρ = (M _{mtl + acr} -M _acr ) / V.

And, the half-layer (HVL _ρ ) of the material for radiation was calculated as the product of the density and half-layer (ρ * HVL) of the material.

At this time, Table 1 compares with the half price shown in the 49th NCRP report.

As can be seen in Table 1, the density of lead and iron holes mixed with air is 6.93 g / cm 3 and 4.75 g / cm 3, and the density of lead and iron having a density of 11.34 g / cm 3 and 7.86 g / cm 3, respectively, is 0.611, 0.604 times.

The half-layers of lead holes for 4MV, 6MV, and 10MV X-rays were 1.89 cm, 2.07 cm, and 2.16 cm, respectively, and the half-layers of iron holes were 3.24 cm, 3.70 cm, and 4.15 cm, respectively.

In addition, the ratio of the half-layer of the lead hole to the lead plate is 1.64 irrespective of the energy, and the ratio of the half-layer of the iron hole to the iron plate is 1.65, which is the same as that of the lead.

For each of the 4,6,10 MV X-rays, the product of the density of lead and the half layer is found to be nearly identical to the half layer (HVL _ρ ) of the material against radiation for lead holes and lead plates mixed with air. The HVL _ρ for the iron and steel plates mixed with air is almost identical for

As a result, the metal ball 120 is relatively lighter than the conventional iron plate or lead plate can be easily filled with a simple tool without limiting the interior space of the concrete wall 111, for the metal ball 120 according to the present invention It can be seen that the transmittance of the radiation is similar to the transmittance of the radiation to the conventional lead plate or iron plate.

In addition, as shown in Figure 3, the radiation shielding wall (100b) according to the second embodiment of the present invention is molded in a spherical shape of the metal ball 120 in the concrete wall 111 in the dry state It is characterized in that it is filled in the steel structure 140 to maintain a certain shape or to be filled in a certain range or filled state.

The iron structure 140 has an arbitrary shape and is inserted into the concrete wall 111.

In addition, the iron structure 140 is made of a steel plate to block some of the penetration of radiation.

In addition, since the radiation blocking force is increased by the iron structure 140 and the metal hole 120, even if the thickness of the concrete wall 111 is relatively reduced, the same radiation blocking rate as in the related art can be achieved.

At this time, if the width of the concrete wall 111 is long, because the weight of the steel structure 140 is manufactured according to this is heavy, so you need to use equipment such as a crane during installation, in this case directly inside the concrete wall 111 It is preferable to fill the metal hole 120.

On the other hand, as shown in Figure 4, the radiation shielding wall (100c) according to the third embodiment of the present invention is to install a steel structure 140 of any shape inside the concrete wall 111 to block the radiation, Filling the metal ball 120, which is a steel ball (lead ball) or the inside (steel ball) and the inside of the metal plate (150) while aligning in the width direction at least one layer is installed to improve the breaking force It is done.

The engraving plate 150 is made of steel or lead material, it is formed by cutting a predetermined interval in the width direction of the metal plate of steel or lead material in order to reduce the weight when installed in the concrete wall 111 lift.

At this time, the engraving plate 150 forms an inclined surface 152 on the surface in contact with each other so as to be cut obliquely to cross the irradiation direction of the radiation when aligned in the width direction.

Thus, the inclined surface 152, which is a connecting portion of the engraving plate 150, increases the bonding surface of each of the connecting plates 150 and inclines the interconnection portion, thereby reducing the transmittance of radiation having a straight property.

In addition, the radiation is blocked by the iron structure 140 and the metal hole 120 even if a small amount of the transmission between the inclined surface 152 of the engraving plate 150.

In addition, the engraving plate 150 is preferably welded to the inclined surface 152, which is a connection portion so that a minute gap does not occur.

At this time, the engraving plate 150 may be installed inside the iron structure 140 in the interior of the concrete wall 111, as shown, the interview with the iron structure 140 from the outside of the iron structure 140 It can also be installed.

In addition, the thickness of the concrete wall 111 may be reduced for a predetermined radiation blocking rate when the iron structure 140 and one or more layers of the plate 150 filled with the metal hole 120 is aligned inside the concrete wall 111. Of course.

As shown in FIG. 5, the radiation shielding wall 100d according to the fourth exemplary embodiment of the present invention installs the same iron structure 140 as the inner shape inside the concrete wall 111 to shield the radiation. A spherical metal hole 120 is filled in the structure 140.

In addition, by stacking the block 160 between the steel structure 140 and the concrete wall 111 or inside the steel structure 140 to increase the shielding rate of radiation or the thickness of the concrete wall 111 for the same radiation shielding rate Reduce

The block 160 is made of steel or lead and has a length equal to the width of the inside of the concrete wall 111.

In addition, the block 160 forms a curved surface 162 that bends the stacked surface so that radiation irradiated through the laminated surface does not pass linearly.

The curved surface 162 of the block 160 is formed to reduce the amount of passage by causing the radiation to be refracted upon irradiation, and has a 'V' shape.

In addition, the curved surface 162 facing the block 160 may be welded to block a gap through which radiation passes.

On the other hand, as shown in Figure 6, the radiation shielding wall (100e) according to the fifth embodiment of the present invention is the steel structure 140 between the concrete wall 111 and the steel structure 140 or the metal hole 120 is filled Into the inside of the polyester film 170 is inserted.

The polyester film 170 is usually used for radiation shielding.

Thus, the polyester film 170 is made of a size corresponding to the width and height of the concrete wall 111 is installed for the radiation shielding.

On the other hand, as shown in Figure 7, the radiation shielding wall (100f) according to the sixth embodiment of the present invention, while filling the metal hole 120 in the concrete wall 111, iron structure 140, engraving By installing the 150, the block 160, and the polystyrene film 170 in combination according to the use and workability, the shielding rate is increased or the thickness of the concrete wall 111 is reduced.

Unexplained reference numeral 152 is an inclined surface, 162 is a curved surface, and replaces the above.

On the other hand, as shown in Figure 8, the radiation shielding wall (100g) according to the seventh embodiment of the present invention is one or more layers of plate 150 and one or more layers 160 inside the concrete wall 111 By installing the shielding rate is increased or the thickness of the concrete wall 111 is reduced.

At this time, the engraving plate 150 and block 160 is to sculpt the conventional iron plate or soft plate, to facilitate the installation work by reducing the respective weight when installed in the concrete wall 111.

Of course, the engraving plate 150 is aligned with a plurality of the width of the concrete wall 111, each of which is in contact with the inclined surface 152 to transmit the radiation by the inclined surface 152 of the cross angle with the straight-line radiation Block it.

Unexplained 162 is a curved surface.

In addition, as shown in Figure 9, the radiation shielding wall (100h) according to the eighth embodiment of the present invention together with the metal hole 120 in the reinforcing material 102 is placed inside the concrete wall 111 for reinforcement Filled to shield the radiation while improving the strength of the concrete wall 111.

The reinforcement 102 generally refers to a truss girder or the like that is poured into the concrete wall 111.

In addition, as shown in Figure 10, the radiation shielding wall (100i) according to the ninth embodiment of the present invention fills the metal hole 120 in the interior of the concrete wall 111 to seal the interior space, the concrete wall The door 113 is provided to open and close one side of the 111, and the metal hole 120 is filled in the door to block transmission of radiation.

In addition, the concrete wall 111 and the door 113 may be reduced in thickness while lowering the radiation penetrating power by installing the fragment plate 150 and the block 160 in combination therein.

In this case, the door 113 is typically made of steel or stainless material to transmit neutrons in the radiation.

Thus, the door 113 fills the neutron blocker 130 together with the metal ball 120 therein.

At this time, the neutron blocker 130 is a material that is hardened when dried while being in a liquid state.

Here, the neutron blocker 130 is a liquid paraffin or polystyrene.

The neutron blocker 130 is mixed with the metal ball 120 in the door 113 to block the neutrons penetrating through the door 113 to prevent leakage.

On the other hand, as shown in Figure 11, the radiation shielding wall (100j) according to the tenth embodiment of the present invention is built in the basement and filled with a metal hole 120 inside the concrete wall 111 having a closed space It is characterized in that it is intended to prevent radiation leakage of radioactive material (not shown) such as radioactive waste 101 or radioisotope stored inside the wall 111.

At this time, the concrete wall 111 may be reduced in thickness by increasing the blocking force of the outflow of radiation by the radiation waste 101 or the radioactive material by combining the above-described engraving plate 150, block 160 and the like. .

In addition, since the concrete wall 111 simply fills the metal hole 120 therein at the time of construction, the concrete wall 111 may be manufactured in comparison with a process of pouring the molten lead into the concrete wall 111 to cure it.

In addition, in the related art, radiation may be transmitted by bubbles generated during curing of molten lead poured into the bottom, but since the radiation shielding wall 100j of the present invention fills the solid metal hole 120 at room temperature therein, the radiation is transmitted. Maintains blocking power.

As described above, the radiation shielding wall according to the present invention has the following effects.

First, the concrete wall has a spherical lighter shape than the plate-shaped shielding plate for shielding radiation and can simplify the construction by shortening the air and shortening the air. The storage space can be reduced than the shield plate.

Second, since the concrete wall is hardened by mixing the metal balls with the liquid pore-blocking agent therein to eliminate the pores of the metal balls, the concrete wall can increase the radiation blocking force or reduce the thickness of the concrete wall.

Third, the concrete wall can be installed alone or a combination of pieces of plate, block, and polyester film with metal balls inside, it is possible to improve the shielding rate of radiation or to reduce the thickness of the concrete wall.

Fourth, since the metal ball is processed into a spherical shape and filled in the concrete wall in a dried state, it is possible to prevent defects due to radiation penetration by preventing bubbles generated during curing in a liquid state.

Fifth, the concrete wall can block the radiation while increasing the reinforcement of the concrete wall or reduce the thickness of the concrete by filling the metal ball together in the reinforcing material placed inside for reinforcement.

Sixth, the construction method to block the leakage of radiation by simply filling the metal ball in the concrete wall in accordance with the present invention to build a plate or block made of iron or lead in the concrete wall and to install a separate structure to prevent its collapse or Compared with the welding method, the construction cost can be reduced.

Claims (8)

The floor, wall and ceiling are constructed with a concrete wall to seal the interior space, and when the door is made of steel or stainless steel to open and close one side of the concrete wall, it is installed inside the concrete wall and the door to block radiation transmission. In the concrete structure which fills the metal hole of the spherical shape of the metal which is easy to carry and handle a phase, The door is a radiation shielding wall, characterized in that the neutron blocker is cured in a liquid state in the interior filled with the metal hole to reduce the thickness and prevent the generation of voids while blocking the neutron in the radiation. The method of claim 1, The metal ball is a radiation shielding wall, characterized in that made of steel or lead material. The method of claim 1, The metal hole is accommodated in a steel structure made of steel; And the iron structure is inserted into the concrete wall. The method of claim 1, The concrete wall and optionally the door is a block of iron or lead made of iron or lead made of a piece of iron or lead material in contact with the inclined planes diagonally crosswise to the irradiation direction of the radiation and bent portions formed by bending. Radiation shielding wall, characterized in that to increase the shielding power of the radiation by filling the inside together with the metal ball alone or in combination thereof. The method of claim 1, The concrete wall is provided with a polyester film together with the metal ball radiation shielding wall, characterized in that for increasing the shielding power of radiation. In the concrete structure having a floor, a wall and a ceiling to a concrete wall to seal the interior space, and having a door made of steel or stainless steel to open and close one side of the concrete wall, The concrete wall is formed of iron or lead made of iron or lead made of iron or lead material in contact with the inclined planes cut at regular intervals to cross the irradiation angle of the radiation so as to facilitate transport and handling during construction to block the transmission of radiation, or Filling blocks of lead alone or in combination; The door is a radiation shielding wall, characterized in that filling the inside with a neutron blocker cured in a liquid state to reduce the thickness and prevent the generation of voids while blocking the neutron in the radiation. delete The method according to claim 1 or 6, The neutron blocker is a radiation shielding wall, characterized in that the liquid paraffin or polyester.

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