KR102343484B1 - Large area radioactive surface pollution and radiation dose measuring device - Google Patents

Abstract

It is an object of the present invention to enable accurate measurement of radioactive contamination sites and radiation dose even when scanning a large area in a short time while driving wirelessly, thereby increasing the speed, efficiency and accuracy of measurement at the same time, and through a wireless communication module It provides a large-area radioactive surface contamination and radiation dose measuring device that the administrator can check in real time by transmitting the detection value.
The present invention is a drivable body part; a power supply unit for supplying power; a control unit that communicates with an external user terminal and controls the driving of the body part according to location information of radiation and radiation detection points; a detection unit provided in the vehicle body and including a plurality of detectors configured to detect any one or two or more of alpha rays, beta rays, and gamma rays; A plurality of detectors detected by the detection unit transmit the detection values between each other through a wireless communication module, and calculate the location of radioactive contamination and the degree of contamination according to the comparison of the detection values between the plurality of detectors to be transmitted arithmetic unit;

Description

Large area radioactive surface pollution and radiation dose measuring device

The present invention relates to a large-area radioactive surface contamination and radiation dose measuring apparatus, and more particularly, a plurality of detection values can be simultaneously obtained so that an accurate hot spot where radiation is detected can be observed by wireless driving, and a wireless communication module is used. It relates to a large-area radioactive surface contamination and radiation dose measuring device that can be checked in real time by transmitting the detection value through the system.

A radioactive surface contamination measuring device is a device that measures the amount of radioactivity of a nuclide by detecting alpha, beta or gamma radiation emitted from a radionuclide.

As the detector of the radioactive surface contamination measuring device, a GM detector, a proportional counter, and a scintillation detector are used depending on the type of radiation emitted from the nuclide.

Usually, a GM detector or a proportional counter is used for alpha and beta measurement, and a scintillation detector with a density of the detection element made of NaI, BGO, etc. is used for gamma measurement.

Commercially available equipment for measuring alpha and beta has a detector size of 15cm2 to 600cm2, and hardly measures gamma rays.

Therefore, considering that nuclides emitting alpha, beta, and gamma radiation are detected in nuclear power plants, gamma detectors as well as alpha and beta detectors must be used. There is no equipment.

The left and right photos of Figure 1 are Thermo's FLM3D, the detector size is 600cm2, and this product is used when measuring the floor in the radiation management area or when alpha and beta radiation measurements for a wide range of sites are required, such as when a nuclear power plant is dismantled. .

However, the larger the area of the detector, the shorter the measurement time, but it is not possible to accurately determine the area contaminated with radionuclides. For example, in the case of a 600cm2 (width 30cm × length 20cm) detector, the same detection signal is generated regardless of the position (1 to 5) of the radionuclide within the detection area as shown in FIG. 2, so in order to find detailed contamination sites, It should be measured again with a measuring instrument with a small detection area.

The smaller the area of the detector, the more accurately the contaminated area can be measured, but it takes a lot of measurement time.

However, since it is necessary to quickly identify and control the work area or the expected contamination area, a large-area radioactive surface contamination measuring device that can measure a large area quickly and accurately measure a hot spot (concentrated radiation-contaminated area) is required. development is urgently required.

Domestic Patent Registration No. 10-1419766, a portable large-area survey meter for measuring the level of radioactive contamination of soil.

The present invention has been devised to solve the problems of the prior art, and an object of the present invention is to enable accurate measurement of radioactive contamination sites and radiation dose even when measuring while scanning a large area in a short time while driving wirelessly. It is intended to provide a large-area radioactive surface contamination and radiation dose measuring device that can simultaneously increase efficiency and measurement accuracy, and transmit the detection value through a wireless communication module so that the administrator can check it in real time.

The present invention for achieving the above object is a vehicle body part capable of running; a power supply unit for supplying power; a control unit that communicates with an external user terminal and controls the driving of the body part according to the location information of the radiation detection point; a detection unit provided in the vehicle body and including a plurality of detectors configured to detect any one or two or more of alpha rays, beta rays, and gamma rays; A plurality of detectors detected by the detection unit transmit the detection values between each other through a wireless communication module, and the location of radioactive contamination and the degree of contamination are calculated according to the comparison of the detection values between the transmitted plurality of detectors. It is preferable to include a calculation unit.

Preferably, the detection unit includes: a display module that displays a detection value between a plurality of detectors transmitted through a wireless communication module so that an administrator can determine in real time whether the detection area is radioactively contaminated or not .

The calculation unit: assigns an identifier to each of a plurality of detectors, calculates a detection value periodically received from each identifier and a driving speed value of the vehicle body, and derives a radiation detection map in an area consisting of a movement trajectory of the vehicle body in real time It is preferred that the algorithm be performed.

The body part includes: a frame body having a plurality of holes formed therein; and a driving wheel connected to the frame body and made of a caterpillar coated with raw rubber on the surface to reduce vibration of the frame body and drive the frame body, each of the plurality of holes Detectors are seated one by one, and each of the detectors is composed of a counter seated in the plurality of holes, a photomultiplier tube coupled to the counter, and a channel unit installed in the photomultiplier tube, of the counter On the side surface, a seating wing that can be mounted on an edge of any one of the plurality of holes is formed in a horizontal direction, and a shield is installed in each of the detectors to surround each detector so as not to be affected by radiation from the side, and the It is preferable that the shielding body includes a top shielding part for shielding the upper side of the detector, and a slope shielding part for shielding the front, rear, left and right sides of the detector.

It is preferable that each of the plurality of holes has the same size and shape, and the plurality of holes are formed side by side at the same interval.

One or two of the channel units are installed in one photomultiplier tube, and when two are installed, each channel unit is preferably a channel for sensing different radioactivity.

According to the large-area radioactive surface contamination and radiation dose measuring apparatus according to the present invention, accurate observation of radioactive contamination sites is possible even if a large area is scanned in a short time while driving wirelessly, thereby improving the speed and efficiency of measurement and accuracy of measurement. At the same time, there is an effect that the detection value is transmitted through the wireless communication module, so that the administrator can check it in real time.

1a is a photograph of a conventional large-area radioactive surface contamination measuring device,
1B is a conceptual diagram illustrating the operation of the measuring device of FIG. 1A.
2a is a diagram schematically showing a front view of a large-area radioactive surface contamination and radiation dose measuring apparatus according to the present invention;
Figure 2b is a diagram schematically showing a plan view of a large-area radioactive surface contamination and radiation dose measuring apparatus according to the present invention,
3A is a diagram of a radiation detector for alpha and beta ray measurement;
3b is a diagram of a radiation detector for gamma-ray measurement,
4 is a block diagram of a large-area radioactive surface contamination and radiation dose measuring apparatus according to the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

Prior to the description of the present invention, the following specific structural or functional descriptions are only exemplified for the purpose of describing embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms and , should not be construed as being limited to the embodiments described herein.

In addition, since the embodiment according to the concept of the present invention may have various changes and may have various forms, specific embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific disclosed form, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In addition, the components of the present invention are to be interpreted in the same range not only in direct contact or connection, but also in contact or connection through other components between components and components.

2a is a diagram schematically showing a front view of a large-area radioactive surface contamination and radiation dose measuring apparatus according to the present invention, and FIG. 2b is a schematic plan view of a large-area radioactive surface contamination and radiation dose measuring apparatus according to the present invention 3A is a diagram of a radiation detector for alpha-ray and beta-ray measurement, FIG. 3B is a diagram of a radiation detector for gamma-ray measurement, and FIG. 4 is a large-area radioactive surface contamination and radiation dose measuring device according to the present invention It is a block diagram.

As shown in these drawings, it is preferable that the large-area radioactive surface contamination and radiation dose measuring apparatus according to the present invention includes a body part 100 .

The body part 100 is provided to be able to travel through wireless control, and the frame body 10 provided with the driving wheels 12 to enable the vehicle body 100 to be driven is installed. At this time, the driving wheel 12 is preferably made of a caterpillar to drive the frame body 10 while reducing vibration, and the surface of the caterpillar is preferably coated with raw rubber.

As described above, when the driving wheels 12 for driving the vehicle body 100 are configured as caterpillars coated with raw rubber on the surface, vibrations occurring in the existing driving wheels can be reduced, and the road surface with a slight curvature It has the advantage of maintaining the distance between the surface and the detector.

As shown, the large-area radioactive surface contamination and radiation dose measuring apparatus according to the present invention preferably includes a power supply unit 200 .

The power supply unit 200 is provided to supply power to the body part 100, and a battery is installed in the body part 100 itself to supply power or a wire ( up to 10M) can be installed to be connected to the body part. In this case, the traveling distance of the vehicle body may be limited by the distance of the electric wire. In addition, as the power source, a generator or an inverter may be provided in the vehicle body to supply power.

As shown, the large-area radioactive surface contamination and radiation dose measuring apparatus according to the present invention preferably includes a control unit 400 .

The control unit 400 is for controlling the driving of the body part 100, and it is preferable that the control unit 400 communicates with an external user terminal to control the driving of the body part according to the location information of the radiation detection point.

In this case, the user terminal is implemented in the form of a computing device owned by the user (administrator), for example, a smart phone, a tablet computer, a notebook computer, a desktop computer, or operated by a business operator providing monitoring and control services. It can be implemented in the form of a server. In addition, the user terminal may be configured as a remote control control.

As shown, the large-area radioactive surface contamination and radiation dose measuring apparatus according to the present invention preferably includes a detection unit (300).

The detection unit 300 is provided in the body unit 100 and includes a plurality of detectors 30a and 30b for detecting any one or two or more of alpha rays, beta rays, and gamma rays. It will be described later.

In addition, the detection unit 300 preferably includes a display module (600).

It is preferable that the display module 600 displays the detection values between the plurality of detectors 30a and 30b transmitted through the wireless communication module in real time so that the administrator can determine whether the detection area is radioactively contaminated.

As shown, the large-area radioactive surface contamination and radiation dose measuring apparatus according to the present invention preferably includes a calculating unit (500).

The calculation unit 500 transmits the detection values between the plurality of detectors detected by the detection unit 300 through the wireless communication module 700, and compares the detection values between the transmitted plurality of detectors. It is desirable to calculate the location of radioactive contamination and the degree of contamination accordingly.

Here, the wireless communication module 700 may perform communication through satellite communication, and may include LAN, Metropolitan Area Network (MAN), Global System for Mobile Network (GSM), Enhanced Data GSM Environment (EDGE), and High Speed Downlink (HSDPA). Packet Access), W-CDMA (Wideband Code Division Multiple Access), CDMA (Code Division Multiple Access), TDMA (Time Division Multiple Access), Bluetooth, Zigbee, VoIP (Voice over Internet Protocol), LTE Advanced, IEEE80216m, Wireless MAN-Advanced, HSPA+, 3GPP Long Term Evolution (LTE), Mobile WiMAX (IEEE80216e), UMB (formerly EV-DO Rev C), Flash-OFDM, iBurst and MBWA (IEEE 80220) systems, HIPERMAN, It may be configured to perform communication by any communication method selected from the group consisting of Beam-Division Multiple ACCess (BDMA), World Interoperability for Microwave Access (Wi-MAX), and ultrasound-based communication.

In addition, the calculation unit 500 assigns an identifier to each of the plurality of detectors, calculates a detection value periodically received from each identifier and a driving speed value of the vehicle body, and detects radiation in an area formed by the movement trajectory of the frame body Preferably, an algorithm for deriving the map in real time is performed.

That is, the time and travel speed passed for each part throughout the area corresponding to the trajectory of the frame body travel are variables, and an identifier is assigned to each radiation detector, so that the entire irradiated area is that of any one radiation detector. The radiation detection value can be obtained in units of the grid area as large as the size, and thus a detection map that can distinguish the detection degree of radioactivity over the entire irradiated area is finally obtained, so that the precise location of surface contamination can be identified, Identification of hot spots can be made accurately.

As shown, the detection unit 300 provided in the large-area radioactive surface contamination and radiation dose measuring apparatus according to the present invention includes a plurality of detectors for detecting radiation in the frame body 10 provided in the vehicle body 100 ( A plurality of holes (not shown) are formed so that 30a, 30b) can be mounted.

In the conventionally used large-area radioactive surface contamination detector, as described with reference to FIG. 1b in the background art, it is difficult to determine the exact location where the radionuclide was detected in the detector. Nevertheless, it takes a considerable amount of time to measure radioactive surface contamination of a large area with a small-area detector.

Therefore, in the embodiment of the present invention, in a state in which a plurality of independent small detectors, detectors 30a and 30b, are provided, a plurality of detectors 30a and 30b are simultaneously mounted on one body frame 10 and can be towed integrally. By being composed of, it is possible to measure the radioactive contamination of the same or larger area as the conventional large-area radioactive surface contamination measuring device, but since each small radiation detector (30a, 30b) can independently measure the radioactivity most intensively contaminated A large-area radioactive surface contamination measuring device capable of detecting a 'hot spot', a site, is proposed.

In this case, each of the detectors 30a and 30b mounted on the frame body 10 is preferably configured to detect any one or two or more of alpha rays, beta rays, and gamma rays.

In the embodiment of FIGS. 3A and 3B , an alpha-ray and beta-ray detector 30a and a gamma-ray detector 30b are respectively illustrated.

As the radiation detectors 30a and 30b, conventionally used radiation detectors are used, but it is preferable to be manufactured in a modular form so that they can be inserted into the plurality of holes (not shown) formed in the frame body 10 .

In addition, as a detector used for measuring alpha, beta, and gamma rays, a Phoswich detector capable of measuring both alpha and beta rays may be manufactured in the form of a module, and in the case of gamma rays, gamma rays may be measured. The NaI detector may be manufactured as the gamma ray detector 30b.

2B shows a plurality of radiation detectors 30a and 30b in a mounted state, so the plurality of holes formed in the frame body 10 so that each of the detectors 30a and 30b can be mounted is not visible, but one in each hole of the detectors 30a and 30b are mounted.

In particular, the plurality of holes are formed side by side at the same interval as shown in FIG. 2B . Therefore, according to the distance from the radioactive contamination source, a plurality of radioactive detectors 30a and 30b detect the presence of radioactive contaminants with differential values from each other. The combination of values can determine the exact location and size of a radioactive contamination source.

In addition, the radiation detectors 30a and 30b mounted side by side on the frame body 10 detect the entire area of the surface formed along the movement trajectory in the process of moving the frame body 10 forward and backward even if only one array is formed. Therefore, the radiation detectors 30a and 30b do not need to be mounted with a plurality of arrays, and even if only one array is mounted, the same effect as when a plurality of arrays is mounted can be exhibited.

Each of the plurality of radiation detectors 30a and 30b includes a counter 31a and 31b seated in a plurality of holes as shown in FIGS. 3a and 3b, and a photomultiplier tube 32a coupled to the counters 31a and 31b, respectively. 32b), and channel units 34, 35, 36 installed in the photomultiplier tubes 32a, 32b. 3A and 3B are a plan view, a bottom view, a perspective view, and a front view, all clockwise from the upper left.

The two channel units 34 and 35 installed in the radiation detector shown in FIG. 3A are an alpha ray channel unit 34 and a beta ray channel unit 35, respectively. As such, a detector capable of detecting both alpha rays and beta rays is a phoswich detector as a representative example, and any other radiation detector capable of detecting both alpha rays and beta rays can be adopted.

The radiation detectors 30a and 30b shown in FIG. 3B are provided with only the gamma ray channel unit 36 . Therefore, the radiation detectors 30a and 30b of FIG. 3B may be any NaI detector or any other detector capable of detecting gamma rays.

In both the detectors of FIGS. 3A and 3B , seat wings 33a and 33b are formed on the side surfaces of the counters 31a and 31b, and are formed to be mounted in the hole (not shown) formed in the frame body 10 . At this time, the seating wings 33a and 33b are stepped toward the lower side as shown in FIGS. 3A and 3B, so that the step is mounted on the upper part of the hole rim and the lower part is inserted into the hole, so that insertion and extraction are extremely simple, It is formed so that the inserted state can be stably maintained even if there is vibration in the horizontal direction.

In addition, it is preferable that a shielding body 38 in the form of surrounding each of the detectors is further installed in each of the detectors 30a and 30b so as not to be affected by radiation from the side.

The shielding body 38 preferably includes an upper shielding portion 38a for shielding the upper sides of the detectors 30a and 30b, and a slope shielding portion 38b for shielding the front, rear, left, and right sides of the detectors 30a and 30b. That is, the shielding body 38 may have a structure that surrounds the detector in a 'C' shape.

According to the present invention, each detector is shielded by installing a shield to surround the radiation and dosimetry detector (Detector) so that it is not affected by the radiation of the side.

In addition, the present invention enables accurate observation of radioactive contamination sites even when measuring a large area in a short period of time, thereby maximizing the efficiency of radioactivity measurement by simultaneously increasing the speed and efficiency of the measurement and the accuracy of the measurement.

In the present invention, since the driving wheel is provided with a caterpillar coated on the surface of the raw rubber, vibration can be reduced compared to the existing driving wheel, and the distance between the surface and the detector can be maintained even on a slightly curved road surface.

In particular, the present invention enables the operator to drive wirelessly by the remote control in the conventional manual driving method dragged by the operator, and the measured radioactivity and radiation dose are transmitted wirelessly so that the administrator can check it in real time.

The technical problem of the present invention is achieved by the technical configuration as described above, and although it has been described with reference to the limited embodiments and drawings, the present invention is not limited thereto and the present invention can be achieved by those skilled in the art to which the present invention pertains. It goes without saying that various modifications and variations are possible within the equivalent scope of the technical spirit of the claims and the claims to be described below.

100 - body part 200 - power part
300 - detection unit 400 - control unit
500 - arithmetic unit 600 - display module
700 - wireless communication module

Claims (6)

a drivable body part;
a power supply unit for supplying power;
a control unit that communicates with an external user terminal and controls the driving of the body part according to the location information of the radiation detection point;
a detection unit provided in the vehicle body and including a plurality of detectors for detecting any one or two or more of alpha rays, beta rays, and gamma rays; and
A calculation unit that transmits the detection values between the plurality of detectors detected by the detection unit through a wireless communication module, and calculates the location of radioactive contamination and the degree of contamination according to the comparison of the detection values between the transmitted plurality of detectors. but,
The body part,
A frame body having a plurality of holes formed therein, and a driving wheel connected to the frame body and made of a caterpillar coated with raw rubber on the surface to drive while reducing vibration of the frame body,
A shield in the form of surrounding each of the plurality of detectors is installed in each of the plurality of detectors so as not to be affected by radiation from the side,
The shield is
A large-area radioactive surface contamination and radiation dose measuring device, characterized in that it comprises a top shielding portion for shielding the upper side of each of the plurality of detectors, and a slope shielding portion for shielding front, rear, left and right sides of each of the plurality of detectors.
According to claim 1,
The detection unit,
A large-area radioactive surface comprising a; Pollution and radiation dosimetry devices.
According to claim 1,
The calculation unit,
An algorithm that assigns an identifier to each of the plurality of detectors, calculates the detection value periodically received from each identifier and the driving speed value of the vehicle body, and derives a radiation detection map in real time from the area formed by the movement trajectory of the vehicle body A large-area radioactive surface contamination and radiation dose measuring device, characterized in that performed.
According to claim 1,
In each of the plurality of holes, the plurality of detectors are seated one by one,
Each of the plurality of detectors,
It consists of a counter seated in the plurality of holes, a photomultiplier tube coupled to the counter, and a channel unit installed in the photomultiplier tube,
A large-area radioactive surface contamination and radiation dose measuring device, characterized in that on the side of the counter, a seating wing that can be mounted on an edge of any one of the plurality of holes is formed in a horizontal direction.
5. The method of claim 4,
Each of the plurality of holes has the same size and shape, and the plurality of holes are formed side by side at the same interval.
5. The method of claim 4,
One or two channel units are installed in one photomultiplier tube, and when two are installed, each channel unit is a channel for detecting different radioactivity. .

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