JP5753763B2 - Radioactive material contaminated soil removal method and radioactive material contaminated soil removal management system - Google Patents

Description

  The present invention relates to a method for excavating and removing soil in a region contaminated with radioactive material, and a management system for efficiently performing removal work of soil contaminated with radioactive material and further reducing the amount of removal. .

  Due to an accident at a nuclear power plant, a large amount of radioactive material is released into the environment and contaminates the surrounding soil. After scattering, the radioactive material falls on the ground surface due to rain or the like and stays near the ground surface. In order to purify the contamination caused by such radioactive substances, it is considered to excavate and remove soil near the ground surface and appropriately treat the excavated soil.

  In order to remove the contaminated soil near the ground surface, the radiation dose is measured, and after determining the range and depth for removing the soil, the soil near the ground surface is excavated. And after removing the soil, it is necessary to measure the radiation dose and proceed with the work while confirming that no strong contamination remains.

  The measurement of the radiation dose is generally performed by using a radiation dose measurement device as described in Patent Document 1, and holding the measurement device near the ground surface and reading the value displayed on the display unit.

JP 2010-169645 A

  However, contamination of soil with radioactive materials is extremely widespread. And the amount of soil required to be removed is also enormous. When excavating and removing soil near the ground surface over a wide range, it is difficult to achieve efficient work if the operator repeats sequential measurement with a radiation dose meter. Moreover, it is required to remove as little soil as possible. Furthermore, it is necessary to record the contamination status before the removal operation and the contamination status after removing the soil, and a means for efficiently collecting these records is desired.

  The present invention has been made in view of such circumstances, and an object thereof is a method for efficiently removing soil contaminated with a wide range of radioactive substances, and a radioactive pollutant that can be used in this method. It is to provide a removal management system.

In order to solve the above-mentioned problem, the invention according to claim 1 is directed to detecting a radiation dose measuring device and a position where the radiation dose is measured by the radiation measuring device by a global positioning system (hereinafter referred to as GPS), A GPS receiver capable of outputting information as a signal, mounted on a vehicle, traveling the vehicle to an area contaminated with radioactive material, and radiating radiation by the radiation dose measuring device at a plurality of positions in the area The amount of radiation measured, combined with the measured radiation dose and information of the measurement position of the radiation dose obtained by the GPS receiver, stored in a storage device, self-propelled, excavated the ground, near the ground surface A display device is provided at a position where an operator of the excavating machine who can remove the soil can visually recognize the position where the excavating machine is operated, and a map of an area in which the vehicle travels is displayed on the display device In addition, the radiation dose at a plurality of positions measured by the radiation dose measuring device is displayed on the map, and the operator of the excavating machine observes the radiation dose displayed on the display device while After the removal of the soil is started, the radiation dose measuring device measures the radiation dose first, and the radiation dose is again measured at a position substantially the same as the position displayed on the display device. When measuring the radiation dose, the radiation dose data at the position is updated, and at any time after the start of the measurement by the radiation dose measuring device, the radiation dose and the information on the measurement position are measured. A method for removing radioactive material-contaminated soil stored in the storage device separately from the data to be updated accordingly is provided.

  In this method of removing radioactive material contaminated soil, a wide range of contaminated states can be detected and recorded quickly by running a vehicle equipped with a radiation dose measuring device and a GPS receiver. Moreover, it becomes possible to easily recognize the distribution of the contamination state by displaying this measurement value on the display device so as to overlap the map. Then, the operator of the excavating machine can perform excavation and removal work of the contaminated soil while looking at the distribution of the contamination state displayed on the display device. As a result, operations such as removing the soil near the ground surface thickly at a position where the radiation dose is large and removing the soil thinly at a position where the radiation dose is small are possible. Moreover, even after starting the excavation and removal work of the soil, the progress of the removal work of the contaminated soil can be always grasped by continuing the measurement of the radiation dose. Therefore, it is possible to accurately perform the removal work on the position where the contaminated soil remains. As described above, the operator of the excavating machine always works while grasping the state of the radiation dose at each position, thereby improving the work efficiency and reducing the amount of soil to be removed. Furthermore, it is possible to record a state in which the radiation dose is reduced by the removal operation, and it is possible to easily compare with the state before the removal.

  The invention according to claim 2 is the method for removing radioactive material-contaminated soil according to claim 1, wherein the vehicle travels independently of the excavating machine before starting to remove the soil by the excavating machine. After the soil removal is started, the vehicle is connected to the excavating machine and pulled by the excavating machine.

  In this method, before starting the excavation and removal work of the soil, the vehicle is traveled to the contaminated area to quickly record the contamination state, and after starting the excavation and removal work of the soil, the vehicle is moved to the excavating machine. It is possible to re-measure the radiation dose at the position where the soil is removed by connecting and running. Therefore, it is possible to perform an efficient removal operation while updating the radiation dose at the position where the soil is removed, without requiring an operator for measuring the radiation dose in addition to the operator of the excavating machine.

According to a third aspect of the present invention, there is provided a radiation dose measuring device, a position where the radiation dose is measured by the radiation dose measuring device is detected by a global positioning system (hereinafter referred to as GPS), and position information is output as a signal. A GPS receiver capable of being mounted on a vehicle, traveling the vehicle to an area contaminated with radioactive material, and measuring the radiation dose by the radiation dose measuring device at a plurality of positions in the area. The radiation dose is combined with information on the measurement position of the radiation dose obtained by the GPS receiver, and stored in a storage device. The vehicle can be self-propelled, excavating the ground, and territory which shall have a drilling machine for removing soil,該掘cutting provided a display device at a position where it can machine operator visibility at the position to operate the該掘cutting machine to travel the vehicle on the display device The radiation dose at a plurality of positions measured by the radiation dose measuring device is displayed on the map, and the radiation dose displayed on the display device by the operator of the excavating machine is displayed. While viewing, removing the soil, after starting the removal of the soil, the radiation dose measuring device measures the radiation dose first, and the radiation dose is almost the same as the position displayed on the display device When the radiation dose is measured again, the radiation dose data at the position is updated, and at any time after the start of the measurement by the radiation dose measuring device, the radiation dose and the measurement position information are The present invention provides a method for removing radioactive material-contaminated soil that is stored in the storage device separately from the data that is updated as the radiation dose is measured.

  In this method, a vehicle having a function as an excavating machine can measure radiation dose in a contaminated area and continuously excavate and remove contaminated soil. Furthermore, the data of the position where the radiation dose is reduced by removing the soil can be updated together with the removal work. Therefore, efficient removal work can be performed by a small number of workers.

According to a fourth aspect of the present invention, there is provided a radiation dose measuring device mounted on a traveling vehicle, a position where the radiation dose is measured by the radiation dose measuring device is detected by a global positioning system (hereinafter referred to as GPS), and position information A GPS receiver capable of outputting the signal as a signal, and storing the radiation dose measured by the radiation dose measuring device in a storage device in combination with the information of the radiation dose measurement position obtained by the GPS receiver. And a position where the operator of the excavating machine that can run and excavate the ground to remove the soil near the ground surface can be visually recognized at the position where the excavating machine is operated. The display device, and the CPU displays a map of a region in which the vehicle is traveling on the display device, and is superimposed on the map, with the radiation dose measuring device. Next, a function for displaying the radiation dose at a plurality of measured positions, and after starting the removal of the soil, the radiation dose measuring device first measures the radiation dose and displays the radiation dose on the display device. When the radiation dose is measured again at substantially the same position as the position where the radiation dose is measured, the radiation dose data at the position is updated, and at any time after the start of the measurement by the radiation dose measuring device, the radiation dose and its The present invention provides a radioactive material-contaminated soil removal management system set to have a function of storing information on measurement positions in the storage device separately from the data to be updated.

  In this radioactive material contaminated soil removal management system, radiation dose measuring devices and GPS receivers mounted on vehicles measure radiation doses at many points in a wide range, and the measured values are correlated with measurement position information. Can be recorded. The operator of the excavating machine can easily recognize the distribution of the contamination state by the display device in which the measurement value is displayed so as to be superimposed on the map. Therefore, the operator of the excavating machine can excavate and remove the contaminated soil while looking at the distribution of the contamination state displayed on the display device. In addition, after starting the excavation and removal work of the soil, the radiation dose data is updated and displayed on the display device by continuing the measurement of the radiation dose by the radiation dose measuring device. Therefore, the operator of the excavating machine can always grasp the progress state of the removal work of the contaminated soil, and can accurately perform the removal work on the position where the contaminated soil remains. In addition, the state in which the radiation dose is reduced by the removal operation can be recorded, and it is easy to compare with the state before the removal.

  The invention according to claim 5 is the radioactive material-contaminated soil removal management system according to claim 4, wherein the radiation dose measuring device and the GPS receiver can be transferred from the vehicle to the excavating machine and used. Alternatively, the vehicle can be connected to the excavating machine and towed by the excavating machine.

  In this system, the radiation dose at the position where the soil is removed can be remeasured while excavating and removing the soil. Therefore, it is possible to perform an efficient removal work while updating the radiation dose at the position where the soil is removed, without requiring an operator for measuring the radiation dose in addition to the operator of the excavating machine.

  According to a sixth aspect of the present invention, in the radioactive material contaminated soil removal management system according to the fourth aspect of the present invention, a second GPS receiver is mounted on the excavating machine, and the map is overlapped with the map on the display device. The position shall be displayed.

  In this system, the position of the excavating machine is displayed on the map displayed on the display device together with the radiation dose distribution. It is possible to accurately grasp the specific positional relationship, and it is possible to perform a quick removal operation.

  As described above, the radioactive substance-contaminated soil removal method and radioactive substance-contaminated soil removal management system of the present invention can quickly and efficiently remove soil contaminated with a wide range of radioactive substances. Become.

It is a schematic block diagram which shows the removal management system of the radioactive substance contaminated soil which is one Embodiment of this invention. It is a flowchart which shows the removal method of the radioactive substance contaminated soil which is one Embodiment of this invention. It is a flowchart which shows the removal method of the radioactive substance contaminated soil which is one Embodiment of this invention. It is the schematic which shows an example of the excavation machine equipped with the excavation machine and the radiation dose measuring device, and the excavation machine equipped with the radiation dose measurement device when excavating and removing the contaminated soil and measuring the radiation dose. . It is the schematic which shows an example which is a vehicle carrying a radiation dose measuring device, and has an excavation function.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing a radioactive material contaminated soil removal management system according to an embodiment of the present invention.
This system includes a radiation dose measuring device 11 that measures a radiation dose near the ground surface, and a first GPS receiver 12 that receives a GPS signal in order to detect a radiation dose measurement position by the radiation dose measuring device 11. The first CPU 13 that performs the process of associating the signals output from the radiation dose measuring device 11 and the GPS receiver 12 and outputs the processed signal, and the signal output from the first CPU 13 to the excavating machine 2 And a transmitter 14 that transmits the signal to the receiver 21 that is mounted, and the transmitter 14 is mounted on the vehicle 1 that travels. The excavating machine 2 includes a receiver 21 that receives a signal transmitted from the transmitter 14, a second GPS receiver 22 that receives a signal for detecting the position of the excavating machine 2, and the reception A second CPU 23 for processing signals received by the device 21 and the GPS receiver 22; and a second CPU 23 provided at a position where an operator of the excavating machine 2 can see the position at which the excavating machine 2 is operated. A display device 24 that performs display in response to a signal from and a storage device 25 that stores data based on a signal from the second CPU 23 are mounted.

  The vehicle 1 is preferably capable of self-propelling, but may be one that moves by an operator's force, one that is pulled by another vehicle, or the like.

  As the excavating machine 2, a machine capable of excavating and removing soil near the ground surface, such as a bulldozer, a backhoe, a power shovel, and a wheel loader, can be used.

  The radiation dose measuring device 11 can measure the radiation dose near the ground surface, measures the radiation dose at a predetermined time interval, and outputs a signal indicating the measured value to the first CPU 13. It is something that can be done.

  The first GPS receiver 12 detects signals received by receiving signals from a plurality of GPS satellites 3, and obtains data of radiation dose measurement positions. For this reason, it is desirable to install it above the radiation dose measuring device 11 and acquire the information of the measurement position at the same time when the radiation dose measuring device 11 measures the radiation.

  The first CPU 13 is set to output a processed signal by associating the signals output from the radiation dose measuring device 11 and the first GPS receiver 12 with a personal computer. CPU can be used. The radiation dose measuring device 11 measures the radiation dose every predetermined time while moving, and acquires information on the position where the radiation dose is measured from the GPS receiver and associates them.

  The transmitter 14 mounted on the vehicle 1 and the receiver 21 mounted on the excavating machine 2 transmit and receive signals wirelessly in order to input a signal output from the first CPU 13 to the second CPU 23. It is something that can be done. Such a transmitter 14 and receiver 21 may form a local area network connecting personal computers, or may be a mobile phone via the Internet.

  The second GPS receiver 22 has the same configuration as the first GPS receiver 12 and is mounted on the excavating machine 2 and used to detect the position of the excavating machine 2.

  The second CPU 23 displays a map of an area to be removed by removing soil contaminated with radioactive substances on the display device 24, and based on a signal received by the first GPS receiver 12, The measured position is made to correspond to the position on the map. And it operates to display the measured radiation dose at the corresponding position on the map. As the second CPU 23, the one provided in the personal computer together with the display device 24 and the storage device 25 can be used.

The display by the second CPU 23 can be performed as follows, for example.
The map is divided into squares having a predetermined size and a square of, for example, 50 cm on one side on the actual ground surface. From the signal indicating the position at which the radiation dose received by the receiver 21 is measured, it is detected which of the cells the position is included in, and a color corresponding to the radiation dose measured at that position is colored in the cells. To display. That is, the radiation dose is divided into a plurality of stages, and different colors are associated with each. And the color corresponding to the stage in which the measured value of the radiation dose obtained by the radiation dose measuring device 11 is included is displayed. For example,
Radiation dose less than 0.1 (microsievert / hour) ··· Green radiation dose 0.1 to less than 1.0 (microsievert / hour) ··· Pale green radiation dose 1.0 to 2.0 Less than (microsievert / hour) ··· Yellow radiation dose 2.0 or more and less than 5.0 (microsievert / hour) ··· Pink radiation dose 5.0 or more (microsievert / hour) ·· .. Colored and displayed as red.

In addition, the measurement of the radiation dose is continued as the vehicle 1 travels, and the radiation dose data associated with the measurement position is input to the second CPU 23 one after another, and the radiation dose measurement has already been performed for the cell containing the measurement position. When the color corresponding to the value is displayed, the color of the cell is updated to the color corresponding to the newly measured radiation dose and displayed. Thereby, when the radiation dose is reduced by removing the soil, the reduced state is displayed.
The data regarding the radiation dose can be stored in the storage device 25 at any time, that is, when the operator recognizes that it is necessary. That is, the state before the soil removal operation is started and the state when the removal operation is completed can be stored. It is also possible to set so as to save data at predetermined time intervals.
Note that a part of the function of the second CPU 23 can be performed by the first CPU 13.

A soil removal method using the radioactive substance-contaminated soil removal management system described above will be described below with reference to FIGS.
The vehicle 1 is traveled to an area to be cleaned by removing soil contaminated with radioactive substances, and the radiation dose near the ground surface is measured by the radiation dose measuring device 11 every predetermined time while traveling. The predetermined time can be set to, for example, once / second. By sequentially measuring the radiation dose while the vehicle is traveling as described above, the radiation dose at many positions in the region is measured. In addition, the position of each position where the radiation dose is measured is detected using the first GPS receiver 12 (ST1). These data correspond to the radiation dose value and the position where the value is measured, and these data are input from the first CPU 13 to the second CPU 23 via the transmitter 14 and the receiver 21 (ST2). ).

On the other hand, the display device 24 displays a map of the area where the contaminated soil is removed (ST3). This map information is preferably stored in the storage device 25 in advance.
In the map, the entire area where the contaminated soil is removed is divided into cells having a predetermined size. The size of the section can be a square with a side of, for example, 50 cm on the ground surface. Although it can be divided into larger or smaller than this, it is desirable to determine the size according to the accuracy of GPS. When the radiation dose is measured, for each measured position, it is detected in which grid on the map the position is included. When a cell including the measurement position is detected, the cell is colored in the corresponding color and displayed on the display device 24 based on the measured radiation dose (ST4). It is desirable to measure the radiation dose so that such display is displayed for all the cells in the area, but it is not necessary to measure all the cells until the soil removal operation is started. .
Such radiation dose data is stored as a radiation dose at that time separately from the updated data before the soil removal operation is started and at an appropriate timing after the removal operation is started. It is better to store in 25 (ST5).

  Thereafter, the soil near the surface contaminated with the radioactive material is excavated using the excavating machine 2 and removed so as to peel off a predetermined thickness (ST6). At the same time, in the area where the soil is removed, the vehicle 1 equipped with the radiation dose measuring device 11 is run independently of the excavating machine 2 to measure the radiation dose, and the position where the radiation dose is measured is determined by GPS. Detect (ST10). The radiation dose measurement value and the measurement position information are related and input to the second CPU 23 via the transmitter 14 and the receiver 21 in the same manner as before the soil removal operation is started (ST11). Then, the measurement value of the radiation dose is displayed by coloring the cell including the radiation dose measurement position on the display device 24. At this time, when there is no measurement value in the cell and no color is displayed, the color corresponding to the newly measured radiation dose is colored. Further, when the cell is already colored and the radiation dose is displayed, it is updated and displayed in a color corresponding to the newly measured radiation dose (ST12).

  The operator of the excavating machine 2 can see the display updated at the position where the excavating machine 2 is operated, and can perform excavation work and soil removal work with reference to the display (ST7). In other words, it can be confirmed that the radiation dose has been reduced by removing the soil, and at the position where the radiation dose is still measured, the soil can be further removed to reduce the radiation dose to below the target value. . Then, when it is confirmed that the radiation dose measured in the entire region where the radiation dose is to be reduced by the soil removal is equal to or less than the target value (ST8), the soil removal operation is terminated (ST9). Accordingly, measurement of radiation dose is terminated (ST13). Then, the radiation dose data at each position in the region when the soil removal operation is completed is stored in the storage device 25, and all operations are completed (ST14).

  In the embodiment described above, the vehicle 1 equipped with the radiation dose measuring device 11 travels independently of the excavating machine 2 when performing the soil removal work. As shown in FIG. 4A, the vehicle 1 equipped with the vessel 11 can be connected to the excavating machine 2 and can be driven by towing the excavating machine 2 that is self-propelled. Further, as shown in FIG. 4B, the radiation dose measuring device 11 and the GPS receiver 12 mounted on the vehicle are replaced with the excavating machine 2, and the radiation dose at each position is moved as the excavating machine 2 moves. May be measured.

  Further, as shown in FIG. 5 (a), a radiation dose measuring device 32 is mounted on a vehicle 31 having a function of excavating soil such as a bulldozer, a backhoe, a wheel loader, and the vehicle on which the radiation dose measuring device 32 is mounted. It may be used to measure the radiation dose before starting the soil removal operation. And while performing the removal work of soil by the function which this vehicle 31 has, the radiation dose can be measured during the work. In such a case, the bulldozer or the like can be used as the vehicle 31 having an excavation function, but it is desirable to use a wheel loader or the like that is easy to move. Further, when the radiation dose measuring device 32 is mounted on the vehicle 31 having the excavation function in this way, data is wirelessly transmitted to the CPU located at a position away from the measured value of the radiation dose as shown in FIG. 5B. There is no need, and only one CPU 33 and GPS receiver 34 can be used, and the signal obtained by measuring the radiation dose and the position information detected by the GPS can be directly input to the CPU 33 that controls the display device 35.

  In addition, this invention is not limited to embodiment described above, It can implement with embodiment other than this within the scope of the present invention.

1: vehicle, 2: excavating machine, 3: GPS satellite,
11: Radiation dose measuring device, 12: First GPS receiver, 13: First CPU, 14: Transmitter,
21: Receiver, 22: Second GPS receiver, 23: Second CPU, 24: Display device, 25: Storage device,
31: Vehicle having excavation function, 32: Radiation dose measuring device, 33: CPU, 34: GPS receiver, 35: Display device, 36: Storage device

Claims (6)

A radiation dose measuring device and a GPS receiver capable of detecting a position where the radiation dose is measured by the radiation dose measuring device by a global positioning system (hereinafter referred to as GPS) and outputting position information as a signal. Mounted on
The vehicle travels to an area contaminated with radioactive material, and the radiation dose is measured by the radiation dose measuring device at a plurality of positions in the area,
In combination with the measured radiation dose and the information of the measurement position of the radiation dose obtained by the GPS receiver, it is stored in a storage device,
A display device is provided at a position where an operator of the excavating machine that can self-propel and excavate the ground to remove the soil near the ground surface can be visually recognized at the position where the excavating machine is operated, While displaying a map of the area where the vehicle travels, overlaying on the map, displaying the radiation dose at a plurality of positions measured by the radiation dose measuring device,
The operator of the excavating machine performs soil removal while watching the radiation dose displayed on the display device,
After starting the removal of the soil, when the radiation dose measuring device measures the radiation dose first, and again measures the radiation dose at a position substantially the same as the position where the radiation dose is displayed on the display device, Update the radiation dose data at that location,
At any time after the start of measurement by the radiation dose measuring device, the radiation dose and the information on the measurement position thereof are stored in the storage device separately from the data to be updated with the measurement of the radiation dose. A method for removing soil contaminated with radioactive materials.   The vehicle shall travel independently of the excavating machine before starting the removal of the soil by the excavating machine, and after starting the removal of the soil, the vehicle is connected to the excavating machine. The method according to claim 1, wherein the excavating machine is pulled. A radiation dose measuring device and a GPS receiver capable of detecting a position where the radiation dose is measured by the radiation dose measuring device by a global positioning system (hereinafter referred to as GPS) and outputting position information as a signal. Mounted on
The vehicle travels to an area contaminated with radioactive material, and the radiation dose is measured by the radiation dose measuring device at a plurality of positions in the area,
In combination with the measured radiation dose and the information of the measurement position of the radiation dose obtained by the GPS receiver, it is stored in a storage device,
The vehicle is capable of self-propelled and has a drilling machine that excavates the ground and removes soil near the ground surface, and an operator of the drilling machine can visually recognize at a position where the drilling machine is operated. A display device is provided at a position where the vehicle can travel, and a map of a region in which the vehicle is driven is displayed on the display device, and radiation doses at a plurality of positions measured by the radiation dose measuring device are displayed on the map. ,
The operator of the excavating machine performs soil removal while watching the radiation dose displayed on the display device,
After starting the removal of the soil, when the radiation dose measuring device measures the radiation dose first, and again measures the radiation dose at a position substantially the same as the position where the radiation dose is displayed on the display device, Update the radiation dose data at that location,
At any time after the start of measurement by the radiation dose measuring device, the radiation dose and the information on the measurement position thereof are stored in the storage device separately from the data to be updated with the measurement of the radiation dose. A method for removing soil contaminated with radioactive materials. A radiation dose measuring device mounted on a traveling vehicle;
A GPS receiver capable of detecting a position where the radiation dose is measured by the radiation dose measuring device by a global positioning system (hereinafter referred to as GPS) and outputting position information as a signal;
A CPU that performs processing for storing the radiation dose measured by the radiation dose measuring device in combination with information on the measurement position of the radiation dose obtained by the GPS receiver in a storage device;
A display device provided at a position where an operator of the excavating machine, which is self-propelled and can excavate the ground and remove the soil near the ground surface, can be visually recognized at the position where the excavating machine is operated. And
The CPU
A function of displaying a map of an area in which the vehicle is driven on the display device, and displaying radiation doses at a plurality of positions sequentially measured by the radiation dose measuring device, superimposed on the map,
After starting the removal of the soil, when the radiation dose measuring device measures the radiation dose first, and again measures the radiation dose at a position substantially the same as the position where the radiation dose is displayed on the display device, A function to update radiation dose data at the position;
At any time after the start of measurement by the radiation dose measuring device, the radiation dose and the information of the measurement position are set in the storage device separately from the data to be updated. A radioactive material-contaminated soil removal management system.   The radiation dose measuring device and the GPS receiver can be used by transshipment from the vehicle to the excavating machine, or the vehicle can be connected to the excavating machine and pulled by the excavating machine. The removal management system for radioactive material-contaminated soil according to claim 4.   5. The radioactive material contaminated soil removal management system according to claim 4, wherein a second GPS receiver is mounted on the excavating machine, and the position of the excavating machine is displayed on the display device so as to overlap the map.

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