KR20010097913A - Personal electron dosimeter - Google Patents

Abstract

The present invention relates to a personal electronic dosimetry device which batch-processes radiation exposure management in wearing radiation safety equipment in a place where radiation exposure management is required, and a Geiger Muller tube (2) is installed inside the main body (1). The tube 2 measures the exposure dose and the measured value is amplified by the amplifier 3 and selects only the pulse values available in the pulse height sorter 4 and the sorted values are sent to the counter 5 and the counter 5 Compares the measured value with the set limit dose, if the measured value exceeds the set value, the LED diode (6) is activated to make the LED lamp (7) blink, and an alarm sound is generated from the speaker (8). The measured value in (5) is displayed on an LCD display installed outside the main body, while the measured value is stored in the computer semiconductor memory 11 and the main computer in the computer semiconductor memory 11. The transmission terminal 12 connected to the modem of the main body 1 is provided with a rechargeable battery case 9 and a high voltage power supply 10 inside the film badge storage case 14 is configured to be installed below the main body (1) In the batch dose management method of the present invention, the exposure dose of a worker detected by a Personal Electron Dosimeter after a radiation operation is controlled by a main computer through a hub held at each site. After inputting the data into the designated management equipment of the designated widow management agency through the modem, it is automatically inputted to the exposure management computer, thereby minimizing the distrust of the exposure dose between the conventional film badger and the reader company and the delay of the reading result. It is expected that prompt attention will be raised and accurate dose management will be made by workers.

Description

Personal Electron Dosimeter

The present invention relates to a Personal Electron Dosimeter which batch-processes radiation exposure management in wearing radiation safety equipment in a place where radiation exposure management is required, and collectively performs radiation exposure management using a personal electronic dose meter. It is about how to handle.

Radiation measurements are mainly nuclear power plants, industries that use radioisotopes (RIs), hospitals that use X-ray generators, etc., and the type of radiation measured is γ-Ray.

Measurement methods include radiation monitors such as alarm monitors, pocket city meters, and film badges.

At the end of the radiation work after wearing radiation safety equipment, the individual dose of individual dose is stored and recorded by connecting the hub of the main computer of the office.

At this time, data on the radiation dose of radiation workers wearing radiation safety equipment is immediately inputted to the exposure management computer of the exposure management entrusted agency designated by the Ministry of Science and Technology by using modem transmission. In addition to preventing omissions, the exposure dose is reported every working day so that cause analysis can be performed immediately when there is an overexposure or an abnormal dose.

Looking at the conventional radiation exposure management system with reference to Figure 1 as follows.

1) Contract

The licensee of the use of radioactive materials enters into a film badge management contract with a reader authorized by the relevant authority (the Ministry of Science and Technology) to wear a film badge to manage the exposure dose of workers.

2) Receipt

Receive a film badge from the reader, pay it to the radiation worker on the first day of the month, collect it on the last day of the month, and receive the recovered film from the reader.

3) Reception

The person in charge of the reading organization checks whether the recovered film matches the received return statement, and checks the wearer's registration number, social security number, and wearing institution, and assigns a marking number to each film badge if there is no problem.

4) Marking

In the Marking Room, the Marking Room Background is evaluated and recorded before the marking operation is carried out.

Marking is performed on each film badge in the Marking Room.

Marking condition uses X-ray generator (time: 5sec, 5mA, 30Kv).

5) phenomenon

The developing conditions start with developing after confirming the temperature of developing solution (20 ℃ ± 0.5 ℃), stopping solution (18-21 ℃), fixing solution (20 ± 2 ℃), and first washing water (18-21 ℃).

6) working

The developing operation uses an automatic developing device, and the secondary washing of the developed film is washed with water at about 20 ° C. for about 20 minutes and dried.

7) Drying (Dry register record)

Drying is carried out for about 1 hour 20 minutes at 40 ℃ or less.

8) concentration measurement

Concentrations are measured at 5 points per film. The measured concentrations are automatically transmitted to the computer. The dose calculation is automatically calculated and output.

9) Result report output

The result report is compared with the return statement. If there is a problem, the cause is identified, analyzed, remeasured and evaluated, and a copy of the final result report is kept, and the original is sent to the film badge wearing agency.

10) report

Report the results of the monthly report to the film-wearing company and report the results to the exposure control agency (Korea Radioisotope Association) quarterly.

11) Management

The agency authorized by the Ministry of Science and Technology (Korea Radioisotope Association) records and manages the exposure results of film badge users reported from readers in a database and records that there is an overdose or abnormal dose. The judge shall report to the Ministry of Science and Technology and notify the employer.

Conventional radiation safety equipment uses an alarm monitor, a pocket dome meter, a film badge at a site where radiation or exposure may occur, thereby causing problems such as frequent loss and malfunction of radiation safety equipment.

An object of the present invention is to minimize the distrust of the radiation management system of the radiation worker, as well as the most rapid and accurate exposure management by workers wearing personal electronic dosimetry during radiation work, as well as more efficient dose management It is to provide a treatment method.

In the personal radiation dose meter of the present invention, a Geiger Muller tube is installed inside the main body, and the Geiger Muller tube measures an exposure dose, the measured value is amplified through an amplifier, and selects only pulse values usable in a pulse height sorter and the selected value is a counter. In the counter, the measured value is compared with the set limit dose, and when the measured value exceeds the set value, the LED diode is turned on to flash the LED lamp and the speaker emits an alarm sound. It is displayed on the LCD display installed outside the main body. Meanwhile, the measured value is stored in the computer semiconductor memory, and the computer semiconductor memory is connected to the transmission terminal which is connected to the modem of the main computer. The badge storage case is configured to be installed below the main body.

According to the present invention, the batch dose management method of the exposure dose management team of the Radiation Worker is an exposure management team of the Korea Radioisotope Association, which is an agency designated by the Ministry of Science and Technology, immediately after the radiation operation, through a computer modem transmission method. And inputting the radiation dose to the radiation exposure worker to the main computer of the exposure management team of the Korea Radioisotope Association.

1 is a flow chart for performing radiation exposure management using conventional radiation safety equipment

2 is a diagram showing the configuration of a personal electronic dose meter of the present invention.

3 is a flow chart for performing radiation exposure management of the present invention.

<Brief description of symbols for the main parts of the drawings>

1: body 2: Geiger Muller tube

3: amplifier 4: pulse height selector

5: counter 6: LED diode

7: LED lamp 8: speaker

9: rechargeable battery case 10: high voltage power supply

11: computer semiconductor memory 12: transmission terminal

14: film badge storage case 20: film badge case

The present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows the configuration of the personal electronic dose meter of the present invention, the inside of the body (1) of the size that can be carried by the individual, the component that functions as a conventional alarm monitor and pocket dome meter is installed on the upper and lower The film badge storage case is installed.

First, the configuration of the alarm monitor and the pocket dome meter, the Geiger Muller tube (2) measures the exposure dose, the measurement value is amplified through the amplifier (3) and selects only the pulse value available in the pulse height selector (4).

The selected value is sent to the counter (5), and the counter (5) compares the measured value with the set limit dose, and when the measured value exceeds the set value, the LED diode (6) is activated to flash the LED lamp (7). This causes an alarm sound from the speaker 8.

In addition, the value measured by the counter 5 is displayed on the LCD display provided outside the main body, while the measured value is stored in the computer semiconductor memory 11. A transmission terminal 12 connected to the modem of the main computer is connected to the computer semiconductor memory 11.

On the other hand, the personal electronic dose meter of the present invention includes a rechargeable battery case 9 and a high voltage power source 10 inside the main body 1 for power supply.

Unexplained symbol 13 is the clock.

Next, look at the configuration of the film badge storage case of the present invention.

The film badge storage case 14 of the present invention is installed in the lower part of the measuring instrument body 1, and the film badge case 20 is inserted into the film badge storage case 14. The AL plate 21, the Cu plate 22, the Fe plate 23, and the PB plate 24 are attached to the film badge case 20.

In the film badge case 20, a film is inserted and the exposure dose is measured.

The film badge storage case 14 of the present invention may be replaced with a thermoluminescent dosimeter used in a nuclear power plant.

Figure 3 shows a radiation exposure management system of the present invention, the exposure dose of the worker detected by the personal electronic dosimetry of the present invention after the radiation operation is input to the main computer by the hub of each office It is expected that prompt exposure of the workers and exposure management will be promptly performed by automatically inputting them to the designated computer for managing the management of designated widows through modems.

The personal electronic dose meter of the present invention prevents film badge loss by making a film badge case in the personal electronic dose meter in consideration of the frequent loss due to the poor storage of the film badge of the radiation worker. Promote the effect.

On the other hand, radiation personal safety equipment of three types (alarm monitor, pocket city meter, film badge) is integrated into the personal electronic dose meter of the present invention to maximize the efficiency of management.

Personal electronic dosimeter of the present invention configured as described above is managed and maintained by writing the exposure dose indicated on the pocket dosimetry meter using ionizing box after the completion of the work by the radiation worker in the field of radiation use The exposure dose measured in the pocket dome meter has the disadvantage that the measured value disappears even with a slight impact. In order to compensate for this, G-M Tube is used, and at the same time, it is possible to automatically input radiation exposure dose of radiation workers to the computer by using the semiconductor memory transmission terminal.

In the batch processing system of the present invention, the dose of interest of the radiation dose is determined by the worker's daily dose of the radiation dose to the worker designated by the Ministry of Science and Technology (KISA). Prevention of induction, radiation dose record of workers and accurate exposure dose are managed efficiently. Thus, when there is an abnormal dose of radiation worker or at the time of overexposure, cause analysis can be performed immediately.

By manufacturing a film badge storage case in the personal electronic dose meter of the present invention, the film badge is stored to prevent the loss of film badge due to carelessness of the radiation worker.

The personal electronic dosimetry device of the present invention maximizes the efficiency of personal radiation safety management by integrating and unifying the alarm function of the alarm monitor which is a conventional radiation personal safety equipment, the direct radiation function of the pocket dome meter, and the exposure dose storage function of the film badge. do.

Claims (4)

Inside the main body 1, a Geiger Muller tube 2 is installed, and the Geiger Muller tube 2 measures the exposure dose, the measured value is amplified by the amplifier 3, and only the pulse values available in the pulse height sorter 4 are available. The selected and selected values are sent to the counter (5), and the counter (5) compares the measured value with the set limit dose, and when the measured value exceeds the set value, activates the LED diode (6) to operate the LED lamp (7). Flashes and an alarm sounds from the speaker 8 and the value measured by the counter 5 is displayed on the LCD display installed outside the main body, while the measured value is stored in the computer semiconductor memory 11 A transmission terminal 12 connected to the modem of the main computer is connected to the computer semiconductor memory 11, and a rechargeable battery case 9 and a high voltage power supply 10 are provided inside the main body 1, and the film badge storage case 14 is provided. Installed in the lower part of the main body Consists of three kinds of radiation should be used in the workplace (alarm monitors, Pocket City Mehta, the film badge) dose of personal electronic instrument that incorporates the Radiation Safety equipment One equipment. The method of claim 1, The film badge storage case (14) is a personal electronic dose meter is inserted into the film badge case (20). The method of claim 1, The film badge storage case 14 is a personal electronic dosimeter is inserted a thermofluorescence dosimeter. After the radiation work, the radiation dose of the radiation worker is transmitted to the main computer of the Radiation Management Team of the Korea Radioisotope Association, which is designated by the Ministry of Science and Technology through a computer modem transmission method. The exposure dose of radiation workers is transmitted to the main computer of the Korea Radioisotope Association's Exposure Management Team every working day, which enables rapid cause analysis in case of overexposure or abnormal exposure dose. Way.