KR102562972B1 - Hybrid blasting system that performs decontamination corresponding to the measured pollution level - Google Patents

Abstract

The present invention relates to a hybrid blasting system for performing decontamination corresponding to a measured degree of contamination, comprising: a discharge gun for discharging a decontamination agent; A first receiving tank connected to the discharge gun through an inlet pipe; A second receiving tank connected to the discharge gun; and a controller for controlling discharge information of the decontamination agent, wherein the decontamination agent includes a first decontamination agent accommodated in the first accommodating tank and a second decontamination agent accommodated in the second accommodating tank, and the first decontamination agent and The second decontamination agent is provided with a hybrid blasting system that performs decontamination corresponding to the measured degree of contamination, having different physical properties.

Description

Hybrid blasting system that performs decontamination corresponding to the measured contamination level

The present invention relates to a hybrid blasting system that performs decontamination corresponding to a measured degree of contamination.

As a high-efficiency energy production means, there is energy production through nuclear power generation. Nuclear power generation has attracted attention for its high-efficiency energy production and the advantages of not using fossil fuels. Nuclear power generation uses various means to prevent leakage of radioactivity, but it is close to impossible to be fundamentally free from radioactivity. Therefore, it is common for facilities inside nuclear power plants to be contaminated with radioactivity, and in some cases, facilities can be operated more safely by decontamination of facilities or objects contaminated with radioactivity. Contamination by radioactivity can be divided into a surface-contaminated state and a contamination that penetrates the surface and becomes radioactive to the inside. The material used for decontamination in a superficially contaminated state and the material used for decontamination in an irradiated state may be different. That is, the degree of exfoliation can be determined according to properties such as hardness of the particles discharged during decontamination. However, when using a plurality of particles with different particle properties, each ejection device must be provided, and the use of multiple particles is desirable, but it is difficult to implement this.

Republic of Korea Patent Registration No. 10-1967107 (2019. 04. 08)

An object of one embodiment of the present invention is to enable decontamination to be carried out corresponding to the degree of radiation progress of the decontamination target.

An object of an embodiment of the present invention is to adjust the mixing ratio of each decontamination agent according to radiation by discharging heterogeneous decontamination agents.

The present invention relates to a hybrid blasting system for performing decontamination corresponding to a measured degree of contamination, comprising: a discharge gun for discharging a decontamination agent; A first receiving tank connected to the discharge gun through an inlet pipe; A second receiving tank connected to the discharge gun; and a controller for controlling discharge information of the decontamination agent, wherein the decontamination agent includes a first decontamination agent accommodated in the first accommodating tank and a second decontamination agent accommodated in the second accommodating tank, and the first decontamination agent and The second decontamination agent is provided with a hybrid blasting system that performs decontamination corresponding to the measured degree of contamination, having different physical properties.

Also, the first decontamination agent may have higher hardness than the second decontamination agent.

Also, the first decontamination agent may contain at least silicon and the second decontamination agent may contain solidified CO2.

In addition, the discharge-side end of the discharge gun may further include a measuring unit for measuring the degree of radiation in the discharge direction and transmitting the measured degree of radiation to the control unit.

In addition, the discharge information includes the discharge pressure provided to the discharge gun of the second decontamination agent, the discharge pressure determines the decontamination distance between the discharge side end and the decontamination target, and the measurement area formed from the measuring unit based on the decontamination distance is the discharge pressure. It is formed wider than the decontamination area where the decontamination agent is discharged from the part, but may be within an error of less than 5%.

In addition, only the second decontamination agent is sprayed when the degree of radioactivity measured by the measuring unit is less than the predetermined contamination level in the first contamination state, and in the second contamination state with a predetermined contamination degree or more, the first decontamination agent and the second decontamination agent are sprayed. It can be sprayed in a blended state.

Also, in the case of the second contamination state, the control unit may perform at least one of an increase in the specific gravity of the first decontamination agent and an increase in the discharge pressure as the degree of contamination increases.

In addition, the control unit controls a valve that controls whether or not the inlet pipe to which the first decontamination agent is connected is open and how much is opened, and the discharge information may further include open information including whether or not the valve is open and how much the valve is open.

In addition, the control unit determines the mixing ratio of the first decontamination agent and the second decontamination agent discharged by controlling the discharge pressure and the valve of the decontamination agent based on the degree of radiation received from the measurement unit, and determines the decontamination target in real time from the measurement unit. It is possible to determine the mixing ratio by receiving the degree of radioactivity.

According to one embodiment of the present invention, it is possible to provide a blasting system that allows decontamination to be carried out corresponding to the degree of radiation progress of the decontamination target.

According to one embodiment of the present invention, it is possible to provide a blasting system capable of adjusting the mixing ratio of each decontamination agent according to irradiation by discharging heterogeneous decontamination agents.

1 is a schematic diagram showing a hybrid blasting system for radioactive decontamination according to an embodiment of the present invention.
2 is a diagram showing a connection structure of a blasting system according to an embodiment of the present invention.
3 is a view showing discharging a decontamination agent to a decontamination target according to an embodiment of the present invention.
4 is a view showing discharging a decontamination agent to a decontamination target on which a first contamination layer and a second contamination layer are formed according to an embodiment of the present invention.
5 is a view showing that a mixing ratio for mixing different types of decontamination agents is differently determined according to the degree of radiation according to an embodiment of the present invention.
6 is a flow chart showing a sequence of performing decontamination according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, this is only an example and the present invention is not limited thereto.

In describing the present invention, if it is determined that a detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, the definition should be made based on the contents throughout this specification.

The technical spirit of the present invention is determined by the claims, and the following examples are only one means for efficiently explaining the technical spirit of the present invention to those skilled in the art to which the present invention belongs.

1 is a schematic diagram showing a hybrid blasting system 10 (hereinafter referred to as blasting system 10) for radioactive decontamination according to an embodiment of the present invention, and FIG. 2 is a blasting system according to an embodiment of the present invention ( 10) is a diagram showing the connection structure.

1 and 2, the blasting system 10 of the present invention includes a discharge gun 100 for discharging the decontamination agent B, and a first receiving tank connected to the discharge gun 100 through an inlet pipe 101 110, a second accommodating tank 120 connected to the discharge gun 100, and a control unit 300 for controlling discharge information of the decontamination agent B. Here, the decontamination agent (B) includes the first decontamination agent (B1) accommodated in the first accommodating tank 110 and the second decontamination agent (B2) accommodated in the second accommodating tank 120, The decontamination agent (B1) and the second decontamination agent (B2) use different types of physical properties. Specifically, since the first decontamination agent (B1) has a higher hardness than the second decontamination agent (B2), the first decontamination agent (B1) having a higher hardness can be selectively sprayed as needed during decontamination, and basically the second decontamination agent (B1) has a higher hardness. Decontamination can be carried out by spraying (B2). The second decontamination agent (B2) may have a hardness in which the surface of the decontamination target (W) is not processed, and may be snow through a phase change of carbon dioxide. As a preferred example, the first decontamination agent (B1) may contain at least silicon and the second decontamination agent (B2) may contain solidified CO2. For example, sand is used as the first decontamination agent (B1), and CO2 stored as liquefied carbon dioxide (LCO2) may be used as the second decontamination agent (B2).

Meanwhile, the discharge gun 100 may further include a measurement unit 200 at a discharge-side end portion that measures the degree of radiation in the discharge direction and transmits the measured degree of radiation to the control unit 300 . The measurement unit 200 may be provided at an end of the discharge gun 100 and measure a direction in which the discharged decontamination agent B is discharged. The measuring unit 200 may be a means for measuring in units such as Gy, Sv, rad, rem, or the like, or may be measured in an arbitrary unit that is measured by complexly analyzing other factors such as heat.

In addition, the first decontamination agent B1 is discharged from the discharge gun 100 through a venturi effect. Specifically, in the process of discharging the second decontamination agent (B1) at a predetermined pressure and speed through the inside of the discharge gun (100), the first decontamination agent (B1) passes through the inlet pipe (101). According to the discharge pipe, it may be introduced into the discharge pipe and mixed inside the discharge gun 100. The second decontamination agent (B2) is supplied from the second accommodating tank 120 to the discharge gun 100. It may be provided to the discharge gun 100 by the relatively high pressure inside the second accommodating tank 120 or selectively discharged. The supply pressure (discharge pressure) of the second decontamination agent B2 may be determined by the presser 400 located between the gun 100 and the second accommodating tank 120.

Here, when the supply pressure of the second decontamination agent B2 is determined by the presser 400, the presser 400 may be controlled by the controller 300. Factors for determining the supply pressure by the control unit 300 may include the degree of radioactivity of the decontamination target W measured by the measurement unit 200. When the degree of radioactivity is classified in the range of 1 to 10, for example, when the radioactivity measured through the measuring device is 3, the supply pressure is determined to be low, and when the radioactivity is 7, it may be determined to be relatively high. Of course, the pressure may be adjusted according to the ratio of the first decontamination agent B1 to the discharged decontamination agent B as well as the degree of radiation.

For example, when only the second decontamination agent (B2) is sprayed to the decontamination target (W) through the discharge gun (100), the contaminants to be decontaminated are adhered to and settled on the surface of the decontamination target (W), which cleans the surface. Although it is sprayed for the purpose, when the first decontamination agent (B1) is mixed in a certain ratio and discharged through the discharge gun 100, radioactivity proceeds to some extent, so that not only the surface of the decontamination target (W) but also the surface of the decontamination target (W) Since the inside is contaminated to a predetermined depth, it can be sprayed for the purpose of peeling the surface of the decontamination target W to a predetermined depth.

Therefore, as described above, when the first decontamination agent B1 having high hardness is sprayed, the supply pressure may be determined rather low. Specifically, when the degree of radioactivity is graded from 1 to 10 as described above, if it is 5 or less (hereinafter, the first contamination state), the decontamination target (W), which can be washed even by spraying only the second decontamination agent (B2) ), and in the case of 6 to 10, the state in which radiation progresses from the surface of the decontamination target (W) to the inside according to the progress of radiation (hereinafter, the second contamination state) can mean Therefore, in this case, the first decontamination agent B1 and the second decontamination agent B2 may be mixed and sprayed, and the mixing ratio and supply pressure may be determined by the controller 300.

3 is a view showing discharging a decontamination agent (B) to a decontamination target (W) according to an embodiment of the present invention.

Referring to FIG. 3 , the discharge information of the decontamination agent B discharged from the discharge gun 100 includes the discharge pressure at which the second decontamination agent B2 is provided to the discharge gun 100 . The decontamination distance between the discharge side end and the decontamination target W may be determined by the discharge pressure and the discharge angle. Here, the discharge angle and the decontamination distance can be factors that determine the decontamination area, which means that the measurement area (measurement area) formed by the measuring unit 200 formed on the end side of the discharge gun 100 can be the same At least the measurement area is formed wider than the decontamination area where the decontamination agent B is discharged from the discharge unit, but may be within an error of less than 5% based on the decontamination area.

The degree of radioactivity for the decontamination area measured by this structure may decrease as decontamination progresses, and the measurement unit 200 transmits the degree of radioactivity measured in real time to the control unit 300, thereby lowering the degree of radioactivity. Accordingly, discharge information such as a decrease in specific gravity of the first decontamination agent B1 or a decrease in pressure may be changed to correspond thereto.

When the contamination layer is formed only on the surface of the decontamination target W as in the first contamination layer P1 shown in FIG. 3, only the second decontamination agent B2 can be discharged from the discharge gun 100, but in FIG. In the case where the contamination layer is formed from the surface of the decontamination target W to the inside, such as the second contamination layer P2, the first decontamination agent B1 may also be discharged from the discharge gun 100. This case will be described in detail with reference to FIG. 4 below.

4 is a view showing the discharge of the decontamination agent B to the decontamination target W on which the first contamination layer P1 and the second contamination layer P2 are formed according to an embodiment of the present invention.

Referring to FIG. 4, when the degree of radioactivity measured by the measurement unit 200 is in the first contamination state below the predetermined contamination level, only the second decontamination agent B2 is sprayed, and in the second contamination state above the predetermined contamination degree In this case, the first decontamination agent (B1) and the second decontamination agent (B2) may be sprayed in a mixed state. In the case of the second contamination state as in this example, a part of the surface of the decontamination target W is in a state in which radiation has progressed to the second contamination layer P2, and it is accumulated on the second contamination layer P2 where the radiation has progressed to eliminate the contamination. When the first contamination layer P1 is formed, the first decontamination agent B1 is sprayed to remove at least the second contamination layer P2.

In this case, as the decontamination progresses as described above, since the degree of release is lowered, the discharge information can be changed. Only B2) is not emitted and can be controlled in the region of the second contamination state. After the decontamination is completed, the first decontamination agent (B1) remaining on the surface of the decontamination target (W) can be removed by discharging only the second decontamination agent (B2). To this end, the area where the first decontamination agent B1 is discharged can be separately recorded in a storage unit (not shown), and the control unit 300 can access it and control it so that only the first decontamination agent B1 is discharged.

5 is a view showing that different mixing ratios for mixing different kinds of decontamination agents (B) are determined according to the degree of radiation according to an embodiment of the present invention.

Referring to FIG. 5 , in the case of the second contamination state, the control unit 300 may perform at least one of an increase in the specific gravity of the first decontamination agent B1 and an increase in the discharge pressure as the degree of contamination increases. As described above, the first decontamination agent (B1) may be discharged according to the degree of contamination, and the mixing ratio of the first decontamination agent (B1) increases as a large amount of radiation proceeds from the surface of the decontamination target (W). can Of course, the mixing ratio of the first decontamination agent (B1) may be controlled through the valve 105, and the supply pressure of the second decontamination agent (B2) may be increased so that the first decontamination agent (B1) is decontaminated at a faster rate. By reaching the surface of the object W, the blasting efficiency can be increased. This is not limited and may be satisfied if the blasting efficiency is improved by adjusting one or more conditions of the supply pressure and the mixing ratio.

This example shows the first mixing ratio (A1) and the second mixing ratio (A2) at the same time, but this suggests that the mixing ratio of the first decontamination agent (B1) may vary even for the decontamination target (W) in the same contaminated state, that was intended to imply. Of course, for the decontamination agent B discharged from the discharge gun 100 at the same time, the specific gravity and discharge speed of the first decontamination agent B1 may be the same.

6 is a flow chart showing a sequence of performing decontamination according to an embodiment of the present invention.

Referring to FIG. 6, the blasting system 10 of the present invention measures radiation (S10), determines the decontamination agent mixing ratio (S20), adjusts the discharge pressure (S30), controls the valve opening (S40), and determines whether a decontamination area exists (S50). ) and decontamination completion (S60). Of course, if the area to be decontaminated still remains in the decontamination area presence/absence step, the degree of radioactivity measured from the measurement unit 200 is fed back to the control unit 300 in real time so that the discharge conditions such as the decontamination agent (B) mixing ratio can be recrystallized.

Of course, the control unit 300 may also control the valve 105 for adjusting whether or not the inlet pipe 101 to which the first decontamination agent B1 is connected is opened and how much is opened. Here, the discharge information may further include open information including whether the valve 105 is opened and how much is opened. In addition, by controlling the discharge pressure of the decontamination agent B and the valve 105 based on the degree of radiation received from the measuring unit 200, the discharged first decontamination agent B1 and second decontamination agent B2 The mixing ratio may be determined and the mixing ratio may be determined by receiving the degree of radiation of the decontamination target W in real time from the measurement unit 200.

Decontamination proceeding through this sequence is furthermore, for the decontamination target W in the second contamination state, the control unit 300 approaches the location of the decontamination target W in the second contamination state recorded in the storage unit (not shown). allows only the second decontamination agent B2 to be discharged so that the first decontamination agent B1 remaining on the surface of the decontamination target W can be removed without damaging the surface of the decontamination target W.

Although representative embodiments of the present invention have been described in detail above, those skilled in the art will understand that various modifications are possible to the above-described embodiments without departing from the scope of the present invention. . Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined, and should be defined by not only the claims to be described later, but also those equivalent to these claims.

10 : Blasting system
100: discharge gun
101: inlet pipe
105: valve
110: first receiving tank
120: second receiving tank
200: measurement unit
300: control unit
400: presser
S10: Measurement of radioactivity
S20: Determination of decontamination agent mixing ratio
S30: discharge pressure control
S40: valve opening control
S50: Existence of decontamination area
S60: Decontamination completed
P1: 1st contamination layer
P2: Second contamination layer
W: subject to decontamination
B1: first decontamination agent
B2: Second decontamination agent
B: decontamination agent
A1: first mixing ratio
A2: 2nd mixing ratio
D: measurement direction

Claims (7)

a discharge gun for discharging a decontamination agent;
a first receiving tank connected to the discharge gun through an inlet pipe;
a second receiving tank connected to the discharge gun; and
Including; a control unit for controlling discharge information of the decontamination agent;
The decontamination agent includes a first decontamination agent accommodated in the first accommodating tank and a second decontamination agent accommodated in the second accommodating tank, and the first decontamination agent and the second decontamination agent have different physical properties. ), and
At the discharge-side end of the discharge gun, a measurement unit for measuring the degree of radiation in the discharge direction and transmitting the measured degree of radiation to the control unit is further included;
When the level of radioactivity measured by the measurement unit is less than the predetermined contamination level in the first contamination state, only the second decontamination agent is sprayed, and in the second contamination state above the predetermined contamination degree, the first decontamination agent and the second decontamination agent A hybrid blasting system that performs decontamination corresponding to the measured contamination level so that it is sprayed in a mixed state.
The method of claim 1,
The first decontamination agent has a higher hardness than the second decontamination agent. A hybrid blasting system that performs decontamination corresponding to the measured contamination level.
The method of claim 2,
The hybrid blasting system for performing decontamination corresponding to the measured contamination degree, wherein the first decontamination agent includes at least silicon and the second decontamination agent includes solidified CO2.
The method of claim 1,
The discharge information includes a discharge pressure provided to the discharge gun of the second decontamination agent;
The decontamination distance spaced between the discharge side end and the decontamination target is determined by the discharge pressure, and the measurement area formed from the measurement unit based on the decontamination distance is formed wider than the decontamination area in which the decontamination agent is discharged from the discharge unit of the discharge gun 5 A hybrid blasting system that performs decontamination corresponding to the measured contamination degree, within an error of less than %.
The method of claim 1,
The control unit performs decontamination corresponding to the measured contamination degree so that at least one of an increase in the specific gravity of the first decontamination agent and an increase in discharge pressure is performed as the degree of contamination increases in the case of the second contamination state. Hybrid blasting system.
The method of claim 4,
The control unit controls a valve that controls whether or not the inlet pipe to which the first decontamination agent is connected is open and how open it is, and the discharge information further includes opening information including whether or not the valve is open and how much the valve is open. A hybrid blasting system that performs decontamination corresponding to
The method of claim 6,
The control unit,
The mixing ratio of the first decontamination agent and the second decontamination agent discharged by controlling the discharge pressure and the valve of the decontamination agent is determined based on the degree of radiation received from the measuring unit, and the mixing ratio is determined in real time from the measuring unit. A hybrid blasting system for receiving the degree of radiation of the decontamination target to determine the mixing ratio and performing decontamination corresponding to the measured contamination degree.