WO2017183763A1

WO2017183763A1 - Apparatus and method for preventing toxic material dispersion by means of vortex air curtain

Info

Publication number: WO2017183763A1
Application number: PCT/KR2016/005376
Authority: WO
Inventors: 임만성; 사나울러; 이르판요나스; 고종욱
Original assignee: 한국과학기술원
Priority date: 2016-04-22
Filing date: 2016-05-20
Publication date: 2017-10-26
Also published as: KR20170121365A

Abstract

The present invention relates to an apparatus and method for preventing toxic material dispersion by means of a vortex air curtain, and more specifically, to: an apparatus for preventing toxic material dispersion by being installed near a facility, such as a containment building of a nuclear power plant, where the danger exists of a toxic material leak in case of an accident, and by forming an air curtain by means of an artificial air flow rotating around the surroundings of the facility; and a method therefor. According to the present invention, in a toxic material leak situation, such as a radiation leak in a containment building of a nuclear power plant, an air curtain is formed by means of an artificial air flow rotating around the surroundings of the facility where the leak has occurred, and thus the toxic material is captured by such vortex air flow, and by means of the curtain effect of the vortex air flow, the facilitation of the dispersion of such toxic material by means of an external flow, such as the influence of a surrounding wind, is prevented, and at the same time, the toxic material is collected and removed, and thus the surrounding areas are not impacted despite the leak accident.

Description

Device and method for preventing diffusion of toxic substances by vortex air curtain

The present invention relates to a device and method for preventing the spread of toxic substances by vortex air curtain, and more particularly, is installed around a facility that is likely to leak toxic substances in the event of an accident, such as a nuclear power plant containment building, and rotates around the facility. The present invention relates to an apparatus and a method for preventing the diffusion of toxic substances by forming an air curtain by an artificial air stream.

Since the Fukushima nuclear accident, research and development on new technologies to cope with serious accidents of nuclear power plants have been attempted, and efforts have been made to further improve the safety of nuclear power plants by applying them to the site. However, if there is a situation where radioactive material leaks out of the nuclear power plant, such as in the Fukushima nuclear accident, the development of techniques to quickly capture such material and provide a solution to prevent its spread is still insignificant. Therefore, in the case of a serious accident such as a radioactive spill of nuclear power plants, the development of technology that quickly blocks the spread of toxic substances in order to ensure the safety of the environment and residents of the nuclear power plant is urgently needed.

(Patent Document 1) US5096467 A

The present invention was devised to solve such a problem, and by forming an air curtain by an artificial air stream rotating around such a leaking facility in a toxic material leaking situation such as leakage of radioactive material from a nuclear power plant containment building. It traps the toxic substances by such vortex air flows and also prevents the diffusion of such toxic substances by the external flow, such as the influence of surrounding winds, by the curtain effect of the vortex air streams. Its purpose is to ensure that the accident does not affect the surrounding area in case of leakage.

In order to achieve the above object, the apparatus for preventing the spread of toxic substances by forming an air curtain using vortex around the pollutant according to the present invention is a facility in which there is a risk of leakage of toxic substances in case of accident (hereinafter referred to as 'toxic substance leak facility'). A plurality of blowing towers installed around the air to discharge air for vortex generation; A plurality of air inlets installed around the leaking facilities of the toxic material and sucking air around the leaking facility of the toxic materials; And a control unit controlling the operation of the blowing tower and the air intake port to control the performance of the toxic material diffusion prevention function by the vortex generation.

The toxic substance diffusion preventing device may further include a toxic substance treatment unit for removing the toxic substance component from the air sucked by the air suction port.

The toxic material diffusion preventing device may further include an external flow detection sensor for detecting a direction or speed of wind (hereinafter, referred to as 'external flow') surrounding the toxic material leakage facility.

The apparatus for preventing the diffusion of toxic substances simulates the direction or speed of the wind detected by the external flow detection sensor and the operation of the blowing tower and the air inlet, thereby determining the air discharge operation of the blowing tower and the air suction operation of the intake port. The apparatus may further include a simulation processing unit, and the control unit may operate the blowing tower and the air suction port according to the determination of the simulation processing unit.

The device for preventing the diffusion of toxic substances simulates the operation of the blowing tower and the air intake with respect to the direction or speed of wind (hereinafter, referred to as 'simulation source data') that can be detected by the external flow detection sensor. Simulation processing unit for deriving; And a simulation database for storing simulation result data derived for each simulation source data by the simulation processor, wherein the controller is configured to perform the simulation database with respect to the direction or speed of wind detected by the external flow detection sensor. The simulation result data of may be applied to operate the blowing tower and the air inlet in real time.

The control unit may further include a function of adjusting the direction or speed of air emitted from the blowing tower or adjusting the amount of air absorbed by the air inlet, according to a detection result of the external flow detection sensor.

The air inlet may include a basic inlet that always operates when a leak occurs in the toxic material leaking facility; And a preliminary intake port selectively operated according to the direction or speed of the wind detected by the external flow detection sensor, and the control unit operates the preliminary intake port determined according to the direction or speed of the wind detected by the external flow detection sensor. It may further include a function to.

The toxic material diffusion preventing device may further include a toxic material leak detection sensor installed around the toxic material leaking facility to detect whether or not the toxic material leaks in the toxic material leaking facility.

According to another aspect of the present invention, the method for preventing the spread of toxic substances by forming an air curtain using the vortex around the pollutant, the toxic substance diffusion prevention device, (a) the facility of the risk of leakage of toxic substances in an accident ( (B) a plurality of blowing towers installed around the toxic leakage facility, releasing air for vortex generation; And (b) a plurality of air inlets installed around the toxic material leaking facility to suck air around the toxic material leaking facility.

After the step (b), (c) may further comprise the step of removing the toxic component from the air sucked by the air inlet.

Prior to the step (a), (a01) may further comprise the step of detecting the direction or speed of the wind blowing around the toxic material leakage facility (hereinafter referred to as 'external flow').

Between the steps (a01) and (a), (a02) simulates the direction or speed of the external flow detected in the step (a01) and the operation of the blowing tower and the air inlet, thereby releasing air from the blowing tower. Determining the operation and the air intake operation of the inlet port, the operation of the blowing tower and the air intake port of the step (a) and step (b) can be made according to the determination of the step (a02).

Before the step (a01), (a001) operation of the blowing tower and the air intake for the direction or speed of wind (hereinafter, collectively referred to as 'simulation source data') detectable by the external flow sensor Deriving the simulation result and storing in the simulation database, the operation of the blowing tower and the air inlet of the step (a) and step (b), the direction of the external flow detected in the step (a01) or With respect to speed, it can be performed in real time by applying the simulation result data of the simulation database.

According to the direction or speed of the external flow detected in the step (a01), the control of the direction or speed of the air discharged from the blowing tower, or the amount of air absorbed by the air intake can be made.

In the operation of the air inlet of step (b), the method may further include a function of operating the preliminary inlet determined according to the direction or speed of the sensed external flow.

Before the step (a), (a0) it may further comprise the step of detecting whether the leakage of toxic substances and leaking points from the toxic substance leak facility.

According to the present invention, in a toxic material leak situation, such as a leak of radioactive material in a nuclear power plant containment building, by forming an air curtain by an artificial air stream rotating around such a leaking facility, the toxic material is discharged to such vortex air. Confined by the flow, and also by the curtain effect of the vortex airflow, the diffusion of such toxic substances is prevented from being promoted by external flows such as the influence of the surrounding wind, and it is collected and removed to affect the surrounding area in the event of a leak. It is effective to avoid giving.

1 is a schematic diagram for explaining the principle of the device for preventing the diffusion of toxic substances by the vortex air curtain according to the present invention.

2 is a diagram showing a result of simulating the air flow state around the cylinder.

3 is a view for explaining the principle of the air curtain (air curtain) effect.

Figure 4 is a bird's-eye view showing the configuration of the device for preventing the spread of toxic substances by the vortex air curtain of the present invention installed around the toxic substance leak possible facilities.

FIG. 5 is a view showing embodiments of a blowing tower and an air inlet arrangement of the device for preventing the diffusion of toxic substances by the vortex air curtain of the present invention. FIG.

Figure 6 is a view showing a simulation result of the external flow form around the toxic material leakage possible device, when the toxic material diffusion prevention device by the vortex air curtain of the present invention is not installed.

FIG. 7 illustrates simulation results of vortices and external flows around a toxic material leaking facility when an apparatus for preventing toxic material diffusion by the vortex air curtain of the present invention having four blowing towers disposed thereon operates. FIG. One drawing.

FIG. 8 illustrates simulation results of vortices and external flows around a toxic material leaking facility when an apparatus for preventing toxic material diffusion by the vortex air curtain of the present invention in which six blowing towers are disposed is operated. One drawing.

FIG. 9 is a view showing simulation results of vortices and external flow forms around a facility capable of leaking toxic substances according to external flow rate changes. FIG.

FIG. 10 shows simulation results of vortices and external flows around a toxic material leaking facility according to a change in velocity of air discharged from a blowing tower of a device for preventing toxic material diffusion by the vortex air curtain of the present invention. Figure shown.

11 is a view analyzing the behavior of the radioactive particle emission situation in the nuclear power plant containment building.

12 is a flow chart as an embodiment for performing a method for preventing the diffusion of toxic substances by the vortex air curtain according to the present invention.

Figure 13 is a flow chart as another embodiment for performing a method for preventing the diffusion of toxic substances by the vortex air curtain according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a schematic view for explaining the principle of the device 100 for preventing the diffusion of toxic substances by the vortex air curtain according to the present invention, Figure 2 is a view showing a result of simulating the state of air flow around the cylinder, Figure 3 Is a view for explaining the principle of the air curtain (air curtain) effect.

The present invention is a technology that aims to protect the environment around the nuclear power plant and to prevent damage to local residents by collecting radioactive material leaking from the hole of the nuclear power plant in the event of a serious accident such as radioactive material leakage of the nuclear power plant. to be. Hazardous substances that may leak from various facilities, including radioactive substances that may leak from nuclear power plants, will be collectively referred to as toxic substances.

Referring to FIG. 1, FIG. 1 (a) shows a blowing tower 110 of a device for preventing the diffusion of toxic substances by the vortex air curtain installed around the nuclear power plant containment building 200 and its surroundings. Fig. 1 (b) is a perspective view thereof.

In order to prevent the spread of radioactive material leaking from the damaged part of the nuclear power plant containment building 200, the eddy current generating device 100 of the present invention installs a blowing tower 110 around the nuclear power plant 200. And a suction port 120 for absorbing toxic substances such as radioactive material collected in the vortex 20 is installed on the bottom portion near the containment building 200. The installed blowing tower 110 emits wind 10 and the release angle can be adjusted as necessary. Using the discharged air 10, the air around the nuclear power plant containment dog 200 is rotated to generate an artificial vortex 20 surrounding the entire containment building 200. Air inlet 120, a plurality of toxic substances leaking around the installation 200 serves to suck the air around the toxic substance leaking facilities, leaked from the containment building by the vortex 20 formed as described above It is possible to effectively trap toxic substances through the air inlet 120 while confining toxic substances in the vortex. In addition, the generated vortex 20 effectively blocks external flow such as sea wind, and since the vortex 20 is formed symmetrically, changes in the velocity direction of the external flow do not affect the formation of the vortex.

1 is a view for explaining how to generate a vortex. In FIG. 1 (a), the blue arrow indicates the flow of air 10 emitted from the blowing tower and the air 20 rotating around the containment building, and the red arrow 30 indicates the toxic substance leaked from the nuclear containment building 200. The position and the direction which become. At this time, the air 10 discharged by the blowing tower 110 is a vortex that rotates around the containment building 200 by the direction and viscosity, and the Coanda effect emitted from each blowing tower 110 Will be generated. The Coanda effect will be described later.

As long as the air 10 is continuously discharged to generate the vortex 20 around the containment 200, the volume of the incoming air must be discharged somewhere, so the vortex generation may be prevented by the flow of air leaking somewhere. have. Therefore, the suction port 120 is installed on the bottom as shown in FIG. In FIG. 1B, the blue arrows indicate the air 10 discharged from the blowing tower 110 and the air 40 sucked into the intake port. In this way, the suction port 120 installed on the floor allows the artificial vortex to be continuously and stably formed by sucking air.

The Coanda effect described above is a term that refers to a property in which a fluid is intended to flow on a wall. FIG. 2 shows the results of a flow simulation showing the Coanda effect when a nozzle is installed around a cylinder having a diameter of 10 m.

FIG. 2 (a) shows the case where the flow rate of air discharged from the nozzle is 0.1 m / s, and FIG. 2 (b) shows the case where the air flow rate is 10 m / s. Many fluid phenomena change as the Reynolds number changes, and the Coanda effect also changes as the Reynolds number changes. The Reynolds number is proportional to the density, velocity and shape of the fluid and inversely proportional to the viscosity of the fluid. Thus, the Reynolds number is 100 times greater in FIG. 2 (b) than in FIG. 2 (a). This means that the higher the Reynolds number, the stronger the Coanda effect. The actual containment of the power plant is about 45m in diameter, so even at the same flow rate, the Reynolds number is larger than that of the flow simulation of FIG. Therefore, since the apparatus 100 for preventing toxic substance diffusion by the vortex air curtain of the present invention forms a vortex around the nuclear power plant, it is possible to form the vortex more effectively by using the Coanda effect as described above.

In addition, the toxic material diffusion prevention device 100 by the vortex air curtain of the present invention, by using the air curtain (Air Curtain) effect by the formed vortex to perform the function of effectively preventing the diffusion of the toxic material.

The apparatus 50 for generating the air curtain 51 as shown in FIG. 3 is a device installed in many buildings, and it is possible to maintain the fluid state of the room and the fluid state of the outside differently with the door open. It is purpose equipment. As a representative example, it may be used to keep the indoor temperature warm or cool with the door open, or it may be used to maintain the density of indoor air and the density of outdoor air differently. It can also serve to shield dust and other debris from entering the building.

The toxic material diffusion preventing device 100 by the vortex air curtain of the present invention utilizes such an air curtain effect, but is not simply a method of air discharged from the top to the bottom, as described above. By generating an artificial vortex 20 rotating the 200, the entire air periphery of the nuclear power plant containment building 200 is generated by the vortex 20 to generate an air curtain effect. As a result, an air barrier is formed around the containment building 200 of the nuclear power plant, which not only prevents outflowing toxic substances from spreading out, but also blocks external air flows, thereby preventing toxic substances caused by external air flow. It will serve to block the spread of.

Figure 4 is a bird's eye view showing the configuration of the device for preventing the diffusion of toxic substances by the vortex air curtain of the present invention installed around the toxic material leakage possible facilities, Figure 5 is a device for preventing the diffusion of toxic substances by the vortex air curtain of the present invention (100) Figures of embodiments of the arrangement of the blowing tower (110) and the air intake 120 of the.

Most nuclear power plants are built around the sea, where it is easy to draw cooling water. Around the coast, the wind is continuously generated day and night due to the pressure difference between the land and the sea, and the strength and direction of the wind also change periodically. In this situation, in order to maintain the artificial vortex around the containment building 200 stably, the flow rate of the air discharged from the blowing tower 110 and the suction amount of the air sucked from the inlet 120 are changed according to the change of the surrounding environment. It is desirable to be able to control to change according to the environment of the.

In the case of the present invention, since the plurality of blowing towers 110 are symmetrically installed, artificial vortices can be stably formed regardless of the change in the direction of the wind. However, according to the strength of the wind, the air outlet speed of the blowing tower 110 and the amount of air intake at the inlet 120 can be controlled in real time to easily maintain the artificial vortex stably. Therefore, the present invention is designed to enable real-time control according to changes in the surrounding environment.

4 is a bird's eye view of a device for preventing the diffusion of toxic substances by the vortex air curtain of the present invention installed around a nuclear power plant. The process of the toxic substance diffusion prevention function by vortex generation is controlled by the control part of the toxic substance diffusion prevention apparatus 100 by a vortex air curtain.

As can be seen in Figure 4, each blowing tower 110 is installed around the containment building. Although the blowing tower 110 is installed in the embodiment of FIG. 4, 4 to 8 or more numbers may be installed depending on the embodiment.

In addition, on the bottom surface, by installing two to eight or more suction ports 120 to inhale air to help continuously form the vortex, and at the same time to suck the radioactive material flowing out of the containment building 200 It plays a role. The inhaled radioactive material is to be treated in the toxic material treatment system (130). In particular, nuclear power plants operate as radioactivity treatment systems.

When a toxic material leak such as radioactive material is detected by the toxic material leak detection sensor that detects whether the toxic material leaks in the facility 200 such as nuclear power plants, the control unit blows the blowing tower 110 and the suction port 120. Start up.

The air emitted from the blowing tower 110 may be adjusted between an angle of 0 to 45 degrees and the speed of the air emitted from each blowing tower may be controlled at a speed of 0 to 40 m / s or more. In addition, the air intake intensity at the inlet 120 may also be controlled. Alternatively, a plurality of intake ports 120 may be provided with a basic inlet that is basically operated, and a preliminary inlet that is controlled to operate or stop in accordance with the direction of wind (external flow) blowing from the outside. You can also operate.

The conditions such as the angle of the blowing tower 110 and the discharged air 10, the number of the inlet 120, the suction strength, and the operation control of the primary inlet and the preliminary inlet are buildings based on the nuclear power plant containment building. It can be changed and applied according to the arrangement situation and symmetry of.

5 (a) is a case in which the toxic substance diffusion prevention device 100 by the vortex air curtain is not installed, FIG. 5 (b) is a case in which four blowing towers 110 are installed, (c) of FIG. 4 illustrates a case in which four blowing towers 110 and four air inlets 120 are installed, and FIG. 5D illustrates a case in which six blowing towers 110 and four air inlets 120 are installed. In FIG. 5E, six blowing towers 110 and six

air inlets

120 and 121 are shown. In this case, the inlets 120 at the same positions as (b), (c) and (d) are shown. 4 may be operated as a basic suction port as described above with reference to FIG. 4, and the remaining two suction ports 121 may be operated as preliminary suction ports as described above with reference to FIG. 4. In FIG. 5E, only two preliminary suction ports 121 are shown, but two more are provided in symmetrical positions. That is, as eight preliminary inlets, it can be operated in such a manner that the two are properly operated as the wind direction 60 changes.

In FIG. 5, the wind 60 is an external flow blowing from the outside, and air is discharged in the direction of the arrow 10 in each blowing tower 110. In addition, the speed and angle of the air emitted from each blowing tower 110 may be controlled separately, and the amount of air sucked from the inlet may be controlled in different amounts. In this case, as described above, the basic suction port 120 which is basically operated, and the preliminary suction port 121 which is elastically operated according to the direction of the wind may be provided.

Vortex 20 (see FIG. 1) formed by the blowing tower 110 prevents the diffusion of radioactive material 30 (see FIG. 1) leaking out of the containment 200 and is radioactive by the external flow 60. It is also possible to serve as an air barrier to prevent the material 30 from spreading.

As can be seen in Figure 5, the toxic material diffusion prevention device 100 by the vortex air curtain of the present invention is stable regardless of the direction of the wind because the arrangement of the blowing tower 110 and the suction port 120 is symmetrical Vortex 20 can be generated. The distance from the blowing tower 110 to the containment 200 is disposed in consideration of the structural stability of the roof of the attached building, and the distance between the

inlets

120 and 121 and the containment 200 may be located in the air curtain by the vortex. It was set to.

The apparatus 100 for preventing toxic substance diffusion by the vortex air curtain of the present invention further includes an external flow detection sensor (not shown) that detects external wind, that is, direction or intensity of the external flow 60, around the nuclear power plant 200. Can be installed. The external flow sensor may be installed in the blowing tower 110, or may be separately installed. The controller may perform a function of adjusting the direction or speed of air emitted from the blowing tower or adjusting the amount of air absorbed by the air inlet, according to a detection result of the external flow sensor.

Device for preventing the diffusion of toxic substances by the vortex air curtain of the present invention, as described above, in addition to the morphological approach such as the arrangement form and number of the blowing tower 110 and the suction port 120, the external flow The sensor may sense the direction or intensity of the wind and perform the function of preventing the diffusion of toxic substances through the control accordingly.

That is, the direction of the wind or the intensity of the wind is sensed by the external flow sensor to control the amount of air sucked in the inlet 120, or the main inlet 120 and the preliminary inlet 121 are provided to By controlling the operation or by controlling the amount, speed or direction of the air emitted from the blowing tower 110 may be controlled to generate the artificial vortex 20 in the optimum environment.

As described below, the method for generating the artificial vortex 20 in real time by the apparatus 100 for preventing toxic substance diffusion by the vortex air curtain of the present invention may be two.

i) The toxic material diffusion prevention device 100 by the vortex air curtain, the blowing tower and the direction from the direction or speed of the wind detected by the external flow detection sensor, and the leak point information detected by the toxic material leak detection sensor, Simulating the operation of the air inlet, and comprises a simulation processing unit for determining in real time the speed and direction of the air to be discharged from the blowing tower, the amount of air to be sucked from the inlet or the pre-intake to operate, in real time, Method of operating the blowing tower and the air inlet in accordance with the simulation processing result of the simulation processing unit

ii) Toxic substance diffusion prevention device 100 by the vortex air curtain, the direction or speed of the wind can be detected by the external flow detection sensor, and leak point information detectable by the toxic material leakage detection sensor (hereinafter, collectively ' The simulation processing unit for deriving simulation results for the operation of the blowing tower and the air inlet, and a simulation database for storing simulation result data derived for each simulation source data by the simulation processing unit. And the control unit operates the blowing tower and the air inlet in real time using simulation result data of a simulation database.

Real-time vortex generation control can be performed in the same way.

6 to 10 show the results of simulating the external flow form and the formed vortex form around the toxic substance leaking facility in various cases. That is, a flow simulation was performed to confirm the feasibility to confirm that the idea of the present invention can be actually applied.

First, Figure 6 is a view showing the results of the simulation of the external flow form around the toxic material leakage possible installation, when the apparatus for preventing the diffusion of toxic substances by the vortex air curtain of the present invention.

As shown in the results of FIG. 6, the external flow directly reaches the containment building, and if radioactive material flows out of the containment building 200 in this situation, the spread of pollutants by the external flow is promoted. As a result, the surrounding workers as well as the surrounding environment are heavily polluted by radioactive materials. It also directly damages residents living near power plants and pollutes their residences. If a town or city is contaminated by radioactive material, it is difficult to remove radioactive material, leaving residents unable to live in the area due to pollution for a long time.

7 is a simulation of vortices and external flow around the toxic material leakage possible device when the apparatus for preventing toxic material diffusion by the vortex air curtain of the present invention having four blowing towers 110 disposed therein. It is a figure which shows the result. The inlet port represents an embodiment where four are installed.

Figure 7 (a) is a view showing a streamline for the external flow. As can be seen in the figure, it can be seen that a large amount of external flow penetrates into the vortex. In other words, the effect of the air curtain is not applied properly.

Figure 7 (b) is a view showing the streamline of the internal vortex. When the air inside the artificial vortex does not leak to the outside, when the pollutant leaks, it does not leak outside. As can be seen in the drawing, a large amount of air leaks to the outside. Therefore, the effect of preventing pollutant outflow due to artificial vortex is not shown properly.

Fig. 7 (c) shows the velocity contour (contour) and the velocity vector. As can be seen in the figure, it can be seen that a large amount of external flow penetrates into the internal artificial vortex, and also shows that secondary flow is formed in some portions so that the vortex is not stably generated.

The four graphs of FIG. 7 (d) show the height direction velocity that varies with the height at each of the four intake ports, with the horizontal axis representing the speed and the vertical axis representing the height from the respective intake positions to the upper direction. A negative speed on the horizontal axis means the air goes down. Looking at the results of this graph, air is sucked down at most intakes up to 20 meters. However, as can be seen in the other drawings of FIG. 7, when the blowing tower 110 and the four inlets are each four, the vortex is not formed properly in some parts, and the external flow penetrates into the vortex and does not properly effect the air curtain effect. You can see that. Therefore, if only four blowing towers 110 and the suction port is installed, the effect of generating the vortex is not large enough, and the air curtain effect also appears to be insufficient.

FIG. 8 illustrates simulation results of vortices and external flows around a toxic material leaking facility when an apparatus for preventing toxic material diffusion by the vortex air curtain of the present invention in which six blowing towers are disposed is operated. One drawing. 8 also shows an embodiment in the case where four suction ports are installed.

8 (a) shows a streamline for external flow. As can be seen in the drawing, it can be seen that external flow does not penetrate into the inside, unlike when four towers are installed, and the air curtain effect is effectively applied.

8 (b) is a view showing the streamline of the internal vortex. As can be seen in the figure, the air trapped in the vortex does not escape to the outside. Therefore, it is possible to properly apply the effect of preventing the diffusion of toxic substances by artificial vortex, it is possible to prevent the environment around the nuclear plant from radioactive pollution.

8 (c) is a diagram showing a velocity contour (contour) and a velocity vector. Overall, the vortices are well formed, so that the internal flow is relatively well circulated around the containment, and the effective flow is effectively prevented from invading the external flow.

The four graphs of FIG. 8 (d) also show a height direction velocity that varies with the height at each of the four intake ports, with the horizontal axis representing the speed and the vertical axis representing the height from the respective intake positions to the upper direction. Looking at the graph, it can be seen that the air is sucked down at the remaining intake position except one inlet 81 up to 35m high. In addition, as can be seen in the other drawings of Figure 8, it can be seen that the rotating vortex is formed around the containment building 200. And it can be confirmed that the external flow is effectively blocked by the vortex generated around the containment building 200. And the air around the containment building 200 is rotated by the vortex formed so as to hover around the containment building 200. Therefore, even if the radioactive material is leaked from the containment building 200, it is possible to effectively prevent the diffusion of the radioactive material by the vortex. These results show that due to the nature of the present technology, the change in the direction and speed of the surrounding wind is not significantly affected.

9 and 10 are diagrams showing the results of flow analysis simulation for real time control.

First, FIG. 9 is a diagram illustrating simulation results of vortices and external flows around a toxic material leaking facility according to changes in external flow rates for real time control.

Each simulation result of FIG. 9 shows the mammary gland inside the vortex when the velocity of the external flow is (a), (b), (c), and (d) in order of 1, 2, 4, 5 m / s, respectively. Show results. As can be seen in Figure 9 (a), when the speed of the external flow is small, the artificial vortex is formed relatively stable, as a result, the air inside the artificial vortex does not leak much to the outside while blocking the external flow to some extent It can be seen that, as a result of (b), that is, the vortex is formed unstable up to the speed of the external flow up to 2m / s, but there is little air leaking out. However, as can be seen in (c) and (d), as the velocity of external flow increases, the vortex becomes more and more unstable, and the internal air leaks a lot, and as a result, toxic substances leak out of the containment building. You may not be able to prevent it properly. In other words, as the velocity of the external flow increases, the vortex formation is hindered, and the amount of air trapped inside the vortex increases more. Therefore, it is necessary to respond according to the change of the external flow.

FIG. 10 shows simulation results of vortices and external flows around a toxic material leaking facility according to a change in velocity of air discharged from a blowing tower of a device for preventing toxic material diffusion by the vortex air curtain of the present invention. The figure is shown.

Each simulation result of FIG. 10 is obtained when the velocity of air discharged from the blowing tower 110 is 0, 5, 10, and 15 m / s in order of (a), (b), (c), and (d), respectively. The results are shown and the velocity of the external flow is fixed at 5 m / s.

As can be seen in the figure, when the air is not discharged from the blowing tower 110, the external flow is in contact with the containment 200 as it is, if toxic substances leak out, it promotes the diffusion of toxic substances. When the blowing tower 100 operates, as shown in the other results of FIG. 10, it can be seen that vortices are generated. As the blowing speed increases, less air is released inside the vortex. However, when the flow velocity in the blowing tower 110 is 10 m / s and 15 m / s, it can be seen that there is no significant difference in the vortex generation effect. Therefore, when the speed of the air emitted from the blowing tower 110 is 10m / s, the optimal value that can effectively prevent the diffusion by the external flow and at the same time reduce the power consumed in the blowing tower 110 Judging by From this, it is appropriate to adjust the flow rate of air discharged from the blowing tower 11 to 10 m / s if the velocity of the external flow is 5 m / s. By performing the analysis through this simulation several times, by controlling the air intake amount of the blowing tower 110 and the inlet port 120 in real time according to the speed change in each external flow to create data that can make the vortex generation economically and effectively I can make it.

FIG. 11 is a diagram analyzing the behavior of the radioactive particle emission situation in the nuclear power plant containment 200 (particle behavior analysis).

11 is an analysis result assuming a situation in which the substance in the form of particles when the vortex generation technology is applied, outflowing from the entire containment building 200 in particular. The particle density was assumed to be 1 g / cm ³ , and the total outflowed mass was 10 kg, the distribution of particle size was normally distributed, the average diameter was 10 μm, and the velocity of the emitted particles was assumed to be 0.173 m / s. Figures (a), (b), (c) and (d) are diagrams showing how the particles change with time, and (e) is a graph showing normalized particles inhaled with time. Figure (a) shows the situation 3 seconds after the particles are released, (b) shows 20 seconds, (c) shows 35 seconds, and (d) shows 54 seconds. 3 seconds after the outflow of particles, the released particles do not reach the intake port, so they do not appear to be collected, but as time passes, the particles reach the intake port and are sucked up and the efficiency increases. Simulation results show that more than 80% of the emitted particles are finally inhaled, and the actual efficiency of the CsI, a radioactive material released in the form of particles, is 4.51 g / cm ³ , which is expected to be higher in practical situations. In addition, research and development can further improve inhalation efficiency. Inhaling this level of radioactive material can significantly reduce the pollution around the plant and minimize the damage to local residents. In addition, the cost of removing radioactive material around nuclear power plants after a major accident can be greatly reduced.

12 is a flow chart as an embodiment for performing a method for preventing the diffusion of toxic substances by the vortex air curtain according to the present invention, Figure 13 is a flow chart as another embodiment for performing a method for preventing the diffusion of toxic substances by the vortex air curtain according to the present invention. to be.

Since the method for preventing the diffusion of toxic substances by the vortex air curtain according to the present invention has been described in detail with reference to FIGS. 1 to 11, the method for preventing the diffusion of such toxic substances will now be described with reference to FIGS. 12 and 13. The sequence to be performed is briefly described.

First, referring to the flowchart of FIG. 12, from the toxic substance leak facility, the toxic substance leak and the leak point is detected (S1201), and the direction or speed of the external flow blowing around the toxic substance leak facility is detected (S1202).

According to the detection result in step S1202, control of the direction or speed of air emitted from the blowing tower, or control of the amount of air absorbed by the air inlet is performed, in which case the external flow detection sensor detects it. From the direction or speed of the wind and the leak point information detected by the toxic leak detection sensor, the operation of the blowing tower and the air inlet is simulated, and the speed and direction of the air to be emitted from the blowing tower, The amount of air to be sucked or the preliminary inlet to be operated is determined in real time (S1203), and the blowing tower and the inlet are operated according to the simulation processing result (S1204).

The air sucked by the air intake port is processed by removing the toxic substance component (S1205).

The differentiation point in the flowchart of FIG. 13 is the direction or speed of wind which can be detected by the external flow detection sensor in advance, and leak point information that can be detected by the toxic material leak detection sensor (hereinafter, collectively referred to as 'simulation source data'). In this regard, the operation of the blowing tower and the air intake port is derived from a simulation result and stored in a simulation database (S1301). Thereafter, the operation of the blowing tower and the air inlet is performed in real time using the simulation result data of the simulation database stored as described above (S1304). That is, by using the simulation result data of the simulation database in real time, the speed and direction of the air to be discharged from the blowing tower, the amount of air to be sucked from the inlet or the preliminary inlet to be operated are determined in real time, the blowing tower and the inlet It will be activated (S1304).

10: direction of air emitted from the blowing tower

20: Vortex formed around the nuclear power plant

30: Radioactive materials leaking from nuclear power plants

40: Air absorbed into the inlet

50: air curtain generator installed in the building entrance

51: air curtain

60: wind (external flow)

100: device for preventing the diffusion of toxic substances by vortex air curtain

110: blowing tower of the device to prevent the diffusion of toxic substances by vortex air curtain

111: blowhole of the Blowing Tower

120: air inlet of the device for preventing the diffusion of toxic substances by the vortex air curtain

130: toxic substance treatment unit of the toxic substance diffusion prevention device by the vortex air curtain

200: facilities that can release toxic substances such as nuclear power plants

Claims

As a device to prevent the spread of toxic substances by forming an air curtain using vortex around the pollutant,

A blowing tower installed around the facility (hereinafter referred to as a 'toxic material leaking facility') where there is a risk of leakage of toxic material in an accident, and releasing air for vortex generation;

A plurality of air inlets installed around the leaking facilities of the toxic material and sucking air around the leaking facility of the toxic materials; And

Control unit for controlling the operation of the blowing tower and the air inlet to control the diffusion of toxic substances by vortex generation

Toxic substance diffusion prevention device comprising a.
The method according to claim 1,

Toxic substance processing unit for removing the toxic substance component from the air sucked by the air inlet

Device for preventing the diffusion of toxic substances further comprising a.
The method according to claim 1,

External flow detection sensor for detecting the direction or speed of the wind (hereinafter referred to as 'external flow') blowing around the toxic material leakage facility

Device for preventing the diffusion of toxic substances further comprising a.
The method according to claim 3,

Simulation processing unit for determining the direction or speed of the wind detected by the external flow detection sensor, the operation of the blowing tower and the air inlet, the air discharge operation of the blowing tower and the air intake operation of the inlet

More,

The control unit,

Operating the blowing tower and the air intake in accordance with the determination of the simulation processing section

Toxic substance diffusion prevention device characterized in that.
The method according to claim 3,

A simulation processor configured to derive a result of simulating the operation of the blowing tower and the air intake with respect to the direction or speed of wind (hereinafter, collectively referred to as 'simulation source data') detectable by the external flow sensor; And

Simulation database for storing the simulation result data derived for each simulation source data by the simulation processing unit

More,

The control unit,

Applying the simulation result data of the simulation database to the direction or speed of the wind detected by the external flow detection sensor to operate the blowing tower and the air inlet in real time

Toxic substance diffusion prevention device, characterized in that.
The method according to claim 3,

The control unit,

According to the detection result of the external flow detection sensor,

Adjust the direction or speed of air emitted from the blowing tower,

A function of adjusting the amount of air absorbed by the air intake

Device for preventing the diffusion of toxic substances further comprising a.
The method according to claim 3,

The air inlet,

A basic suction port which always operates when a leakage accident occurs in the toxic material leakage facility; And

Preliminary suction port selectively operates according to the direction or speed of the wind detected by the external flow sensor

Including,

The control unit,

The method may further include a function of operating the preliminary inlet determined according to the direction or speed of the wind detected by the external flow detection sensor.

Toxic substance diffusion prevention device characterized in that.
The method according to claim 1,

A plurality of toxic substance leak detection sensor is installed around the toxic substance leak facility, to detect whether the toxic substance leak in the toxic substance leak facility and the leak point

Device for preventing the diffusion of toxic substances further comprising a.
A method of preventing the diffusion of toxic substances by forming an air curtain using vortices around a pollutant, wherein the toxic substance diffusion preventing device of claim 1 is provided.

(a) blowing air for vortex generation by a blowing tower, which is installed around a facility that is at risk of leakage of toxic substances in an accident (hereinafter referred to as `` toxic substance leak facility ''); And

(b) a plurality of air inlets provided around the toxic material leaking facility to suck air around the toxic material leaking facility

Toxic substance diffusion prevention method comprising a.
The method according to claim 9,

After step (b),

(c) removing the toxic component from the air sucked by the air inlet;

Toxic substance diffusion prevention method further comprising a.
The method according to claim 9,

Before step (a),

(a01) Detecting the direction or velocity of wind blowing around the toxic release facility (hereinafter referred to as 'external flow').

Toxic substance diffusion prevention method further comprising a.
The method according to claim 11,

Between step (a01) and step (a),

(a02) determining the direction or speed of the external flow detected in the step (a01) and the operation of the blowing tower and the air inlet to determine the air discharge operation of the blowing tower and the air suction operation of the inlet;

More,

The operation of the blowing tower and the air intake of step (a) and step (b),

As determined in step (a02) above

Toxic substance diffusion prevention method characterized in that the.
The method according to claim 11,

Before step (a01) above,

(a001) Simulation database for deriving a simulation result of the operation of the blowing tower and the air intake for the wind direction or speed (hereinafter, collectively referred to as 'simulation source data') detectable by the external flow detection sensor Steps to save on

More,

The operation of the blowing tower and the air intake of step (a) and step (b),

It is performed in real time by applying the simulation result data of the simulation database to the direction or speed of the external flow detected in the step (a01)

Toxic substance diffusion prevention method characterized in that the.
The method according to claim 11,

According to the direction or speed of the external flow detected in the step (a01),

Control of the direction or velocity of air emitted from the blowing tower, or

Control of the amount of air absorbed by the air inlet

Method for preventing the spread of toxic substances, characterized in that made.
The method according to claim 11,

In operation of the air inlet of step (b),

Further comprising a function of operating a preliminary inlet determined according to the sensed direction or speed of the external flow.

Toxic substance diffusion prevention method characterized in that the.
The method according to claim 9,

Before step (a),

(a0) detecting whether the toxic substance leaks and the leak point from the toxic substance leakage facility

Toxic substance diffusion prevention method further comprising a.