JP7044835B2 - Radioactive waste management system and radioactive waste management method - Google Patents

Description

The present invention relates to a radioactive waste management system and a radioactive waste management method.

There is a method of managing radioactive waste by attaching an RFID recording data of an individual ID for identifying radioactive waste and radiation dose rate data to the radioactive waste. However, RFID is vulnerable to damage when exposed to strong radiation. RFID may also fall off when refilling radioactive waste into disposal containers. In addition, there is a problem that workers are exposed to RFID when attaching RFID to radioactive waste having a high radiation dose.

In order to solve this problem, we constructed a database that links the individual ID that identifies radioactive waste, the image information of radioactive waste, and the radiation dose rate, and combined the image information of radioactive waste and the image information of the database. A management method for identifying radioactive waste by comparison has been proposed.

Japanese Unexamined Patent Publication No. 2017-161282

Radioactive waste is stored in a storage container with a shielding function and stored in a primary storage location. The radiation dose rate of radioactive waste decreases over time. Radioactive waste whose radiation dose rate is below the standard value is refilled in a large-capacity disposal container and transported to a secondary storage location or a final storage location.

From the radiation dose rate of the radioactive waste measured at the time of primary storage and the elapsed time after the measurement, it can be estimated whether or not the radiation dose rate of the radioactive waste primary storage has fallen below the standard value. However, there are large storage containers for radioactive waste in the primary storage area. In addition, a plurality of radioactive wastes may be stored in one storage container. Therefore, it takes a lot of working time to identify the position of which storage container the radioactive waste whose radiation dose rate is below the standard value is stored.

The present invention has been made under the above-mentioned circumstances, and an object of the present invention is to easily specify a storage location for radioactive waste.

In order to solve the above problems, the radioactive waste management system according to the embodiment includes a photographing device, a radiation dose rate measuring device, a crane, a position information acquisition means, and a data creating device. The photographing device acquires the image information of the radioactive waste to be measured. The radiation dose rate measuring device acquires radiation dose rate information indicating the radiation dose rate of radioactive waste. The crane is remotely controlled to carry multiple radioactive wastes into the storage container. The position information acquisition means is the position on the XYZ coordinates of each radioactive waste in the storage container based on the operation history information in the X-axis direction, the Y-axis direction and the Z-axis direction of the crane with respect to the reference origin set in the storage container. Acquires the position information indicating. The data creation device associates the image information, the radiation dose rate information, and the position information and stores them in the storage device.

It is a block diagram of the radioactive waste management system which concerns on Embodiment 1. FIG. It is a figure for demonstrating the information stored in the storage device of the radioactive waste management system which concerns on Embodiment 1. FIG. It is a flowchart which shows the registration process of the radioactive waste management method which concerns on Embodiment 1. It is a flowchart which shows the collation process of the radioactive waste management method which concerns on Embodiment 1. It is a flowchart which shows the refill process of the radioactive waste management method which concerns on Embodiment 1. It is a block diagram of the radioactive waste management apparatus which concerns on Embodiment 2.

(Embodiment 1)
Hereinafter, the radioactive waste management system according to the embodiment will be described with reference to the drawings. FIG. 1 is a block diagram of the radioactive waste management system 1 according to the present embodiment. As shown in FIG. 1, the radioactive waste management system 1 includes a photographing device 11, a radiation dose rate measuring device 12, a weight measuring device 13, a position information acquisition means 14, a collating device 20, a data creating device 30, and a storage device 40. , The display device 50 is provided.

The photographing device 11 is, for example, a laser scanning device, a CCD camera, or the like. The photographing apparatus 11 acquires image information such as a three-dimensional shape, a surface shape, a color, and an engraving of the radioactive waste to be measured. The radiation dose rate measuring device 12 is a device that acquires radiation dose rate information indicating the radiation dose rate of radioactive waste. A plurality of the photographing device 11 and the radiation dose rate measuring device 12 are arranged so that radioactive waste can be measured from a plurality of directions. The plurality of directions are, for example, three directions of an X-axis, a Y-axis, and a Z-axis that are orthogonal to each other. The weight measuring device 13 is a device that acquires weight information indicating the weight of radioactive waste.

Radioactive waste is lifted by a crane and transported into a storage container. The storage container is a container for storing radioactive waste having a structure that shields radiation with a shielding material or the like. The position information acquisition means 14 acquires position information indicating the position of each radioactive waste in the storage container.

The position information is, for example, information in which a reference position is set as the origin in the storage container and the position with respect to the origin of the radiation waste is expressed in XYZ coordinates. Specifically, when the crane is operated, the operation history information of the crane in the X-axis direction, the Y-axis direction, and the Z-axis direction is stored in the storage device 40. The storage device 40 calculates and stores position information (XYZ coordinates) indicating the position of each radioactive waste in the storage container based on the operation history information of the crane. The position information acquisition means 14 includes an input means, and acquires position information (XYZ coordinates) indicating the position of each radioactive waste in the storage container from the storage device 40. The input means is, for example, a wireless communication device, a wired communication device, a USB interface, or the like.

In addition, the position information acquisition means 14 may acquire the position information indicating the position in the storage container of each radioactive waste by manual input by an operator. In this case, the position information acquisition means 14 is, for example, a keyboard. Further, the position information may be simple information such as the upper stage, interruption, and lower stage in the storage container.

The collation device 20 uses an image recognition program and a dedicated application program of this system to determine whether or not the radioactive waste photographed by the photographing device 11 has been registered in the storage device 40.

The data creation device 30 assigns an individual ID that identifies radioactive waste to unregistered radioactive waste. The data creation device 30 is an individual ID, image information of radioactive waste photographed by the photographing device 11, radiation amount rate information indicating the radiation amount rate of the radioactive waste measured by the radiation amount rate measuring device 12, and a weight measuring device. The weight information indicating the weight of the radioactive waste measured by 13 is associated and stored in the storage device 40. Further, the data creation device 30 provides position information (XYZ coordinates) indicating the position of each radioactive waste in the storage container for storing the radioactive waste, and information for specifying the storage location of the storage container for storing the radioactive waste. It is associated and stored in the storage device 40. Further, the data creation device 30 assigns a storage container ID that identifies the storage container in which the radioactive waste is stored, and together with image information such as the three-dimensional shape, surface shape, color, and engraving of the storage container, the radioactive waste. It is stored in the storage device 40 in association with the individual ID and the like. Further, when refilling the radioactive waste, the data creation device 30 uses a storage container ID for specifying the storage container before refilling and a large-capacity disposal container ID for specifying the large-capacity disposal container after refilling as an individual radioactive waste. It is associated with the ID and stored in the storage device 40.

In the storage device 40, as shown in FIG. 2, information D1 indicating an individual ID for identifying radioactive waste, information D2 indicating the measurement date and time when the radiation dose rate was measured, image information D3, radiation dose rate information D4, Other information D7 including weight information D5, position information D6, information specifying the storage location of the storage container, and the like are associated and stored.

The display device 50 is a liquid crystal display or a head-mounted display. The display device 50 has information D1 indicating an individual ID for identifying radioactive waste, information D2 indicating the measurement date and time when the radiation dose rate and the like are measured, image information D3, radiation dose rate information D4, weight information D5, and position information D6. , Other information D7 including information specifying the storage location of the storage container is displayed.

Next, a method of managing radioactive waste by the radioactive waste management system 1 will be described. FIG. 3 is a flowchart showing a registration process in the radioactive waste management method according to the embodiment. First, various measurements are made for the radioactive waste to be registered (step S11). Specifically, an image of radioactive waste is taken by the photographing device 11, the radiation dose rate of the radioactive waste is measured by the radiation dose rate measuring device 12, and the weight of the radioactive waste is measured by the weight measuring device 13. When the surface shape of the radioactive waste is similar to that of other radioactive waste, the surface of the radioactive waste may be marked, scratched, or sprayed with paint in order to facilitate identification of individual differences.

Next, in order to determine whether or not the measured radioactive waste is registered, the measured image information of the radioactive waste and the image information stored in the storage device 40 are collated (step S12). This collation process will be described with reference to FIG.

The collation device 20 compares the feature amount of the image information of the radioactive waste newly photographed by the photographing device 11 with the feature amount of the image information of the radioactive waste stored in the storage device 40 (step S31). Then, the collation device 20 has a predetermined value as an index showing the correlation between the feature amount of the image information of the newly photographed radioactive waste and the feature amount of the image information of the radioactive waste stored in the storage device 40. If the above is the case (step S32: Yes), it is determined that the radioactive waste has been registered (step S33). Then, the collation device 20 displays on the display device 50 that the radioactive waste has been registered (step S34). Further, the collation device 20 identifies the image information having the highest correlation, and displays information such as the individual ID of the radioactive waste associated with the specified image information, the previous measurement date and time, and the radiation dose rate. Display on.

On the other hand, in the collation device 20, the index showing the correlation between the feature amount of the image information of the photographed radioactive waste and the feature amount of the image information of the radioactive waste stored in the storage device 40 is less than a predetermined value. If there is (step S32: No), it is determined that the radioactive waste is unregistered radioactive waste (step S35). Then, the collation device 20 displays on the display device 50 that the measured radioactive waste has not been registered (step S36), and proceeds to step S13.

Returning to FIG. 3, the data creation device 30 stores the individual ID, the measurement date and time, the image information, the radiation dose rate information, and the weight information in the storage device 40 in association with each other (step S13).

Next, the data creation device 30 determines whether or not the radiation dose rate of the radioactive waste is less than the reference value (step S14). When the radiation dose rate is equal to or higher than the reference value (step S14: No), the radioactive waste is transported to a dedicated area, and is stored and stored in a dedicated container having a shielding effect according to the radiation dose rate (step S20). ). On the other hand, when the radiation dose rate is less than the reference value (step S14: Yes), the radioactive waste is stored in a predetermined storage container (step S15).

The storage container may contain multiple radioactive wastes. In this case, the data creation device 30 stores the position information indicating the position of each radioactive waste in the storage container in the storage device in association with the individual ID or the like (step S16). For example, the position information is information in which a reference position is set as the origin in the storage container and the position with respect to the origin of the ray waste is expressed in XYZ coordinates.

After storing the radioactive waste in the storage container, various measurements are performed on the storage container (step S17). Specifically, an image of the storage container is taken by the photographing device 11, the radiation dose rate on the surface of the storage container is measured by the radiation dose rate measuring device 12, and the weight of the storage container is measured by the weight measuring device 13. Since the surface shape of the storage container is similar to that of other storage containers, the surface of the storage container is engraved or the like in order to easily identify individual differences.

Next, the data creation device 30 stores various measurement information of the storage container in the storage device 40 in association with the individual ID of the radioactive waste, the storage container ID of the storage container, the measurement date and time, and the like (step S18).

Next, the data creation device 30 determines whether or not the radiation dose rate of the storage container is less than the reference value (step S19). When the radiation dose rate is equal to or higher than the reference value (step S19: No), the storage container is transported to a dedicated area, and is stored and stored in a dedicated container having a shielding effect according to the radiation dose rate (step S20). ..

On the other hand, when the radiation dose rate is less than the reference value (step S19: Yes), the storage container is stored in a predetermined place (primary storage place) (step S21). The data creation device 30 stores the information of the storage location of the storage container in the storage device 40 in association with the individual ID of the radioactive waste and the like.

The radiation dose rate of radioactive waste in the storage container decreases over time. The radioactive waste whose radiation dose rate is less than the standard value is refilled in a large-capacity disposal container (step S22). The large-capacity disposal container has a lower radiation shielding effect than the storage container and has a large storage capacity. The large-capacity disposal container is, for example, a container or the like. The refilling process for the large-capacity disposal container will be described with reference to FIG.

First, the worker searches for a storage location for radioactive waste whose radiation dose rate is expected to be reduced below the reference value (step S51). Specifically, the operator estimates the current radiation dose rate of each radioactive waste by simulation based on the measured value of the radiation dose rate in step S11 and the elapsed time after the measurement, and the corresponding radioactive waste. Identify the individual ID of the object. By the operation of the operator, the radioactive waste management system 1 is provided with information on the storage location of the storage container in which the radioactive waste associated with the individual ID of the relevant radioactive waste is stored and the corresponding radioactivity in the storage container. The waste position information (XYZ coordinates) is displayed on the display device 50 (step S52). By looking at this label, the operator can grasp the storage location of the storage container in which the relevant radioactive waste is stored and the position of the relevant radioactive waste in the storage container.

Next, the operator remotely controls the crane based on the display in step S52 to take out the corresponding radioactive waste from the storage container and measure the radiation dose rate (step S53). When the measured value of the radiation dose rate is equal to or higher than the reference value (step S53: No), the operator returns the radioactive waste to the storage container (step S54).

On the other hand, when the radiation dose rate is less than the reference value (step S53: Yes), the operator simulates a packing method with a high storage rate when packing a plurality of radioactive wastes into a large-capacity disposal container (step S55). ). Radioactive waste has different shapes. By devising the packing order, packing position, packing angle, etc. of radioactive waste, it is possible to reduce the gap between radioactive wastes and increase the amount of radioactive waste that can be stored in one large-capacity disposal container. For example, using a simulation program using the Monte Carlo method, the accommodation rate is calculated by changing the combination of radioactive wastes to be refilled, the packing order, the packing position, the packing angle, and the like. Then, a storage method in which the accommodation rate is equal to or higher than the standard value is obtained. The packing position in the large-capacity disposal container of each radioactive waste is displayed on the display device 50 (step S56).

When refilling radioactive waste from a storage container to a large-capacity disposal container, the operator remotely controls the crane based on the display in step S56 to refill the plurality of applicable radioactive wastes into the large-capacity disposal container (step). S57). Radioactive waste stored in a large-capacity disposal container is transported to a secondary storage location or a final storage location.

As described above, the radioactive waste management system 1 according to the embodiment links the image information, the radiation dose rate information, and the position information indicating the position of each radioactive waste in the storage container to the storage device 40. It has a data creation device 30 to store. Thereby, the radioactive waste management system 1 can easily specify the storage place of the radioactive waste corresponding to the designated radiation dose rate.

Further, the data creating device 30 stores the position information indicating the position of each radioactive waste in the storage container and the information specifying the storage location of the storage container containing the radioactive waste in the storage device 40 in association with each other. .. As a result, the radioactive waste management system 1 can specify the storage location of the storage container in which the radioactive waste corresponding to the specified radiation dose rate is stored, and the position of the radioactive waste in the storage container. can. As a result, it is possible to shorten the work time for refilling the radioactive waste corresponding to the specified radiation dose rate from the storage container to the large-capacity disposal container.

Further, when the radioactive waste is refilled from one storage container to another storage container, the data creation device 30 assigns a storage container ID for specifying the storage container before refilling and a storage container ID for specifying the storage container after refilling. , Stored in the storage device in association with the individual ID. This makes it possible to obtain storage history information of radioactive waste.

Further, in the radioactive waste management method according to the embodiment, each radioactive waste in the large-capacity disposal container is used so that the storage rate when the radioactive waste is stored in the large-capacity disposal container is equal to or higher than the specified standard value. It includes a simulation process to analyze the storage position of the waste. By refilling the radioactive waste into a large-capacity disposal container based on this simulation result, the storage rate of the radioactive waste in the large-capacity disposal container can be improved.

When measuring high-radiation waste and storing it in a storage container, it is desirable to perform the above-mentioned radioactive waste measurement work and storage work in a storage container underwater from the viewpoint of preventing the spread of pollution and reducing the exposure of workers.

Further, in the above description, in the process of step S31, the case of determining whether or not the registration has been completed based on the image information has been described, but whether or not the registration has been completed by combining the image information, the weight information, and the radiation dose rate information. You may decide whether or not.

Further, in the above description, the case where the radioactive waste is taken out from the storage container and refilled into a large disposal container has been described, but the storage container may be stored in the large disposal container while the radioactive waste is stored in the storage container. .. If the shapes of the storage containers are the same, the simulation step of step S55 may be omitted.

(Embodiment 2)
In the second embodiment, a simple radioactive waste management device will be described. FIG. 6 is a block diagram of the radioactive waste management device 2.

The radioactive waste management device 2 is physically a mobile terminal such as a smartphone. The radioactive waste management device 2 includes a photographing device 211, a collating device 220, and a display device 250. The photographing device 211, the collating device 220, and the display device 250 have the same functions as the photographing device 11, the collating device 20, and the display device 50 of the radioactive waste management system 1 described in the first embodiment. The display device 250 is a liquid crystal display or a head-mounted display.

The collation device 220 is connected to the storage device 40 of the radioactive waste management system 1 via a wireless communication line. The collation device 220 uses an image recognition program and a dedicated application program of this system to determine whether or not the radioactive waste photographed by the photographing device 211 has been registered in the storage device 40. Specifically, the collation device 220 shows the correlation between the feature amount of the image information of the radioactive waste photographed by the photographing device 211 and the feature amount of the image information of the radioactive waste stored in the storage device 40. Calculate the exponent. Then, when the index indicating the correlation is larger than the specified value, the collation device 220 determines that the radioactive waste is the registered radioactive waste. Further, when the index indicating the correlation is smaller than the designated value, the collation device 220 determines that the radioactive waste photographed by the imaging device 211 is unregistered radioactive waste.

Further, when the index indicating the correlation is larger than the specified value, the collation device 220 identifies the image information having the highest correlation from the image information of the radioactive waste stored in the storage device 40. The collation device 220 displays information such as the individual ID of the radioactive waste associated with the specified image information, the previous measurement date and time, and the radiation dose rate on the display device 250. Further, when the index indicating the correlation is smaller than a predetermined value, the collation device 220 displays on the display device 250 that the measured radioactive waste is not registered.

In the case of radioactive waste with a low radiation dose, the operator may perform confirmation work such as photography without using a crane for a short time. Since the radioactive waste management device 2 is small and lightweight, it is easy to carry and has good operability. Therefore, the confirmation work can be performed in a short time.

Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and variations thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

1 ... Radioactive waste management system 2 ... Radioactive waste management device 11 ... Imaging device 12 ... Radiation dose rate measuring device 13 ... Weight measuring device 14 ... Position information acquisition means 20 ... Verification device 30 ... Data creation device 40 ... Storage device 50 ... Display device 211 ... Imaging device 220 ... Verification device 250 ... Display device

Claims (10)

An imaging device that acquires image information of radioactive waste to be measured, and
A radiation dose rate measuring device that acquires radiation dose rate information indicating the radiation dose rate of the radioactive waste, and
A crane that is remotely controlled and transports the plurality of radioactive wastes into a storage container,
The position of each of the radioactive wastes in the storage container on the XYZ coordinates is shown based on the operation history information of the crane in the X-axis direction, the Y-axis direction, and the Z-axis direction with respect to the reference origin set in the storage container. The location information acquisition means for acquiring location information and
A data creation device that stores the image information, the radiation dose rate information, and the position information in a storage device in association with each other.
Radioactive waste management system with. The data creation device stores the image information, the radiation dose rate information, the position information, and the information for specifying the storage location of the storage container containing the radioactive waste in the storage device in association with each other.
The radioactive waste management system according to claim 1. The data creation device links the individual ID that identifies each of the radioactive wastes, the storage container ID that identifies each of the storage containers, the image information, the radiation dose rate information, and the position information into the storage device. Remember,
The radioactive waste management system according to claim 1 or 2. When the radioactive waste is refilled from one storage container to another storage container, the data creation device links a storage container ID that specifies the storage container before refilling and a storage container ID that specifies the storage container after refilling. Attach and store in the storage device,
The radioactive waste management system according to claim 3. It has a weight measuring device that acquires weight information indicating the weight of the radioactive waste, and has a weight measuring device.
The data creation device stores the weight information in the storage device in association with the individual ID.
The radioactive waste management system according to claim 3. The image information includes at least one of the three-dimensional shape, surface shape, color, and engraving of the radioactive waste.
The radioactive waste management system according to claim 1. An index showing the correlation between the feature amount of the newly captured image information of radioactive waste and the feature amount of the image information of radioactive waste stored in the storage device is calculated, and the index is a specified value. If it is larger than, the newly photographed radioactive waste is judged as registered radioactive waste, and if the index is smaller than the specified value, the newly photographed radioactive waste is regarded as unregistered radioactive waste. Has a collation device to judge
When the data creation device determines that the radioactive waste is unregistered radioactive waste, the data creation device stores the image information, the radiation dose rate information, and the position information in the storage device in association with each other.
The radioactive waste management system according to claim 1. The process of acquiring image information of radioactive waste with a photographing device,
The process of acquiring radiation dose rate information indicating the radiation dose rate of the radioactive waste with the radiation dose rate measuring device, and
The process of transporting a plurality of the radioactive wastes to a storage container by a remotely operated crane, and
The process of setting the reference origin for the storage container and
A step of acquiring position information indicating the position on the XYZ coordinates of each of the radioactive wastes in the storage container based on the operation history information of the crane in the X-axis direction, the Y-axis direction, and the Z-axis direction with respect to the origin .
Image information of the radioactive waste taken by the photographing apparatus, radiation dose rate information indicating the radiation dose rate of the radioactive waste measured by the radiation dose rate measuring device, and the radioactive waste in the storage container, respectively. The process of associating the position information indicating the position of and storing it in the storage device,
Radioactive waste management methods including. In addition to the radioactive waste management method according to claim 8,
A step of associating the image information, the radiation dose rate information, and the position information with information for specifying the storage location of the storage container in which the radioactive waste is stored, and storing the information in the storage device.
A process of identifying radioactive waste corresponding to the specified radiation dose rate based on the information stored in the storage device, and
A step of displaying on a display device the storage location of the storage container in which the specified radioactive waste is stored and the position information indicating the position of each of the radioactive waste in the storage container.
The process of removing the specified radioactive waste from the storage container and refilling it in a large-capacity disposal container, and
Radioactive waste management methods including. Simulation to analyze the storage position of each radioactive waste in the large-capacity disposal container so that the storage rate when a plurality of the radioactive wastes are stored in the large-capacity disposal container is equal to or higher than the specified reference value. Process and
A step of refilling the radioactive waste into the large-capacity disposal container based on the storage position of each of the radioactive wastes obtained in the simulation step, and a step of refilling the radioactive waste into the large-capacity disposal container.
The radioactive waste management method according to claim 9.

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