JP4147737B2 - Personal dose management system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
According to the present invention, a worker who works in a radiation management area (hereinafter abbreviated as a management area) such as a laboratory that handles an X-ray generator or an accelerator or a characteristic calibration site of a radiation measuring instrument is exposed in the management area. Individual radiation dosimeter (hereinafter abbreviated as “dosimeter”) for measuring the radiation equivalent dose value (hereinafter abbreviated as “equivalent dose equivalent value”) and the radiation dose (individual dose) for each worker The present invention relates to an individual dose management apparatus for management.
[0002]
[Prior art]
For the management of the individual dose in the case of having a large management area such as a nuclear power plant, the individual dose management system mainly including the entrance / exit area management device 4 and the central computer 5 as shown in FIG. Is generally adopted.
In this case, when a worker who works in the management area enters the management area, first, an individual installed outside the entrance of the entrance / exit management device 4 that is also an entrance to the management area. A rechargeable dosimeter 3 is borrowed from the alarm dosimeter charging and lending device (hereinafter abbreviated as a dosimeter charging lending device) 1, and then the dosimeter 3 is set in the entrance / exit area management device 4. The entry / exit management device 4 is made to read personal identification information from personal identification means, for example, an ID card. The entrance / exit management device 4 transmits the read personal identification information such as the ID number to the central computer 5, and the central computer 5 uses the information to determine the dose equivalent value (exposed dose equivalent value) of the worker who has already been exposed. ) And the like, and whether or not the worker is allowed to enter the area is determined. The gate of the entrance / exit management device 4 is opened. A business worker carries a dosimeter 3 in which personal identification information, an already-exposed dose equivalent value, etc. are written, enters the management area, and performs a predetermined operation. In the case of no entry, the central computer 5 displays the status on the entry / exit management device 4 to keep the gate closed, and rejects the entry of the business worker.
[0003]
The portable dosimeter 3 measures the dose equivalent value in the entrance area, and the dose equivalent value or the cumulative dose equivalent value accumulated in the existing dose equivalent value is set from the allowable dose equivalent value. When each alarm set value is reached, an alarm is issued to inform the worker. The alarm set value is set in consideration of an allowable level for the entire period, an allowable level for each work, and the like.
[0004]
A worker who leaves the management area sets the portable dosimeter 3 in the entrance / exit management device 4, personal identification information from the dosimeter 3, exposure dose equivalent value or cumulative dose equivalent value, etc. Is read by the entrance / exit management device 4. The entry / exit management device 4 transmits the read information to the central computer 5, and the central computer 5 determines whether or not the business worker is withdrawn based on the information. The gate of the device 4 is opened and the worker is retired. At this time, the worker removes the dosimeter 3 set in the entrance / exit management device 4 from the entrance / exit management device 4 and carries it, exits the management area, and enters the dosimeter charging / lending device 1. Return dosimeter 3. In the case of leaving, the gate of the entrance / exit management device 4 is not opened, and the worker is stopped by the entrance / exit management device 4 to call an attendant. Thereafter, the business person will act according to the instructions of the staff.
[0005]
The personal dose management system as described above is a system that is adopted when a large-scale management area such as a nuclear power plant is provided. On the other hand, if the management area is much smaller, such as a laboratory that handles X-ray devices and accelerators, or a characteristic calibration site for radiation measuring instruments, the entrance / exit management device 4 and the central computer 5 are not installed. Individual exposure dose management is adopted by using a film batch or a combination of a film batch and a dosimeter used in the above system.
[0006]
As a matter of course, even in this case, the annual cumulative dose equivalent value is managed so as not to reach the allowable upper limit of 50 mSv. In the case of a film batch, the exposure dose equivalent value for one month is usually read and recorded by reading once a month for development. When there is a possibility that the exposure dose equivalent has increased, an intermediate reading is added as necessary. In the case of a dosimeter, the dose equivalent value measured by the dosimeter is read and recorded from the display unit of the dosimeter every time it enters the controlled area, and is recorded in a predetermined period unit such as a monthly unit. Aggregated and managed.
[0007]
The dosimeter used for such management includes a rechargeable dosimeter 3 that is housed in the dosimeter charging and lending device 1 as described above and is charged every time it is returned. There is a dosimeter with a built-in battery driven by a battery that is replaced accordingly. In the case of the rechargeable dosimeter 3, the reset of the dose equivalent value data measured in the previous use to zero is executed by returning to the dosimeter charging and lending device 1, and the dose of the battery built-in type In the case of a total, it is executed by turning the power OFF / ON. The reason for resetting the data to zero is that dosimeter lending is not dedicated. When the dosimeter is dedicated for each business worker, it is not necessary to reset to zero every time entering the management area, and it may be reset to zero every predetermined period.
[0008]
FIG. 5 is a block diagram showing a configuration of an example of a conventional rechargeable dosimeter 3.
The dosimeter 3 includes a radiation detection unit 31 that measures the radiation dose rate in the work environment, a display unit 32 that displays measurement results, and an alarm unit 33 that issues an alarm when the exposure dose equivalent value reaches an alarm set value. And an operation unit 34 for inputting and instructing instructions for causing the display unit 32 to display an equivalent dose value and the like, and a control unit connected to these to control the dose equivalent value and cumulative dose from the radiation dose rate. A dosimeter control unit 35 that calculates and records an equivalent value and outputs an alarm signal, a display signal, and the like based on the measurement result, a power source unit 36 composed of a secondary battery, and the power source unit 36 as a dosimeter charge lending device 1 The battery charging connection portion 37 is connected to the battery charger.
[0009]
The battery built-in type dosimeter has substantially the same configuration as the above dosimeter 3, except that the power source unit 36 is a battery and does not have the battery charging connection unit 37.
The radiation dose rate measured by the radiation detection unit 31 is time-integrated by the dosimeter control unit 35 and becomes an exposure dose equivalent value. The dose equivalent value in the entrance area and the cumulative dose equivalent value obtained by adding this dose equivalent value to the existing dose equivalent value are recorded in the recording area of the dosimeter controller 35. The exposure dose equivalent value or the like is read by the entry / exit management device 4 and transmitted to the central computer at the time of leaving, or read out from the display unit 32 and recorded by the worker after leaving.
[0010]
The dosimeter 3 returned to the dosimeter charging / lending device 1 is connected to the dosimeter charging / lending device 1 through the battery charging connection unit 37, and the secondary battery of the power source unit 36 is charged for the next use.
FIG. 4 is a block diagram showing a configuration of a conventional dosimeter charge lending apparatus 1.
Normally, this dosimeter charging / lending apparatus 1 is equipped with 10 dosimeters 3 arranged side by side in the first stage, and in the case of an individual dose management system as shown in FIG. Often constitutes a single device. However, in the case of a small management area, the number of stages is adjusted according to the number of necessary dosimeters 3.
[0011]
FIG. 4 shows a 10-unit unit 10 that can be equipped with 10 dosimeters 3 side by side. On the front surface of the dosimeter charging and lending apparatus 1, a bezel serving as a decorative plate and an insertion port for the dosimeter 3 is attached. The dosimeter 3 corresponds to each dosimeter 3 and is attached to the bezel. A status display unit 11 indicating whether the charging is in progress or charging is completed, and a lending switch 12 for unlocking the dosimeter 3 when a business worker borrows the dosimeter 3 that has been charged. It has been.
[0012]
The ten-unit unit 10 connects the battery charging connection portion 37 of the dosimeter 3 to charge the secondary battery of the dosimeter 3 and holds the dosimeter 3 and the charging electrode pin 14 that holds the dosimeter 3. Charges the electrode pin 15, the limit switch 16 as a position detection switch for detecting attachment of the dosimeter 3, a connector (not shown) to the status display unit 11 and the lending switch 12, and the secondary battery of the dosimeter 3 In addition, 10 sets of the charging circuit unit 18 that detects the charging state and generates a charging state signal and the control unit 17 having the following functions are provided.
[0013]
The control unit 17 receives a signal indicating that the dosimeter 3 is mounted from the limit switch 16 and issues a charging start signal to the charging circuit unit 18. The state display unit 11 displays “medium” or “charge completed”, and the dosimeter lock mechanism 13 of the dosimeter 3 that has been charged by receiving a signal from the lending switch 12 is unlocked, and the dosimeter 3 can be extracted.
Such ten-unit units 10 are arranged, for example, vertically in 10 stages and connected to a common power source 19 to constitute the dosimeter charging and lending device 1.
[0014]
[Problems to be solved by the invention]
In the individual dose management system described at the beginning of the "conventional technology", that is, the individual dose management system mainly composed of the entrance / exit area management device and the central computer, the exposure dose during each entrance / exit area of the worker Equivalent values and the like are transmitted to the central computer, and the central computer finely manages the radiation exposure state for each worker.
[0015]
However, in the management by the film batch, a check for one month is general, and it is not possible to grasp the daily dose equivalent value or the working time in the management area from the film batch. In management using a dosimeter, the daily equivalent dose value can be grasped from the transferred record, but it takes time to transfer it, and there is a risk of error. In addition, in order to grasp the work time, it is necessary to record the entry time and the withdrawal time in addition to the exposure dose equivalent value every time the worker works in the management area.
[0016]
The purpose of this inventions, without using the room access zone management unit and the central computer, the exposure dose equivalent values for each entering and leaving pass into controlled area and working time, easily and accurately determine a short time it Ru provide child Tonia personal dose management apparatus consisting mainly of dosimeters and dosimeter charging lending device capable.
[0019]
[Means for Solving the Problems]
The invention of claim 1
When a worker working in a radiation control area enters the radiation control area, it is borrowed and carried by the worker from a personal alarm dosimeter charging / lending device, and the worker is exposed in the radiation control area. Measure and record the dose equivalent value of the emitted radiation, issue an alarm when the equivalent dose equivalent value reaches the set value, and return to the personal alarm dosimeter charging and lending device when leaving the radiation control area, Furthermore, each time it is borrowed by a worker, information for recording in time series at least personal identification information, entry time, withdrawal time, and borrowed dose equivalent value of the borrowed worker a recording unit, a personal alarm line dosimeter and an information connection means for exchanging information with the personal alarm dosimeter charging and dispensing machine and a plurality mounted, and to charge them dosimeter To lend An individual dose management device with a built-in function of the dosimeter charging lending unit,
And personal identification information reading means for reading the personal identification information, input means for inputting instructions for information reading from the dosimeter, the dosimeter to the personal identification information and room access enter the frequency at time or dosimeter Dosimeter connection means connected to dosimeter information connection means for reading information in the information recording unit, information search means for executing the instructions, and output means for outputting search results based on the instructions And
By receiving personal identification information from the personal identification information reading means and receiving a dosimeter rental request, let the rental request time be the entry time, and record the entrance time together with the personal identification information in the information recording unit of the dosimeter, And by returning the dosimeter, the return time is set as the withdrawal time, and the withdrawal time is recorded in the information recording part of the dosimeter together with the personal identification information and the entry time, and the dosimeter borrowed by the worker is The dose equivalent value until it is returned is recorded in the information recording unit together with the personal identification information and the entry time, and based on the instruction input from the input means, the information search means via the dosimeter connection means, to search the information instructed from the information recording unit of all dosimeter is mounted, and wherein the Rukoto is output to the output means and the search results.
[0020]
Each time a dosimeter is borrowed, information such as personal identification information and entry / exit time of the worker who borrowed the dosimeter is input and recorded in the information recording part of the dosimeter via the dosimeter connection means, The equivalent dose value during borrowing of the dosimeter is recorded in the information recording unit of the dosimeter together with the information. Therefore, if necessary information is retrieved from these information recorded in time series in the information recording section of all dosimeters installed in the dosimeter charging and lending device section, it is necessary for personal dose management. Therefore, it is possible to obtain accurate data easily in a short time.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a dosimeter and an individual exposure dose management apparatus according to the present invention will be described using examples. In addition, the same code | symbol is used for the part of the same function as a prior art.
[Example of dosimeter]
FIG. 2 is a block diagram showing the configuration of an embodiment of the dosimeter according to the present invention.
[0022]
In this example, in addition to the function of a conventional dosimeter, every time it is borrowed by a worker, at least personal identification information, entry time, withdrawal time, and exposure dose during borrowing of the borrowed worker An information storage function for recording the equivalent value in a time series is added, and an information connection means for exchanging such information with the dosimeter charge lending device is provided. That is, this dosimeter is a data storage type dosimeter.
[0023]
This will be described in more detail with reference to FIG.
This data storage type dosimeter 3a includes a radiation detection unit 31 that measures the radiation dose rate in the work environment, a display unit 32 that displays measurement results, etc. An alarm unit 33 that issues a warning when the accumulated dose equivalent value accumulated in the existing dose equivalent value reaches a set level, an instruction for causing the display unit 32 to display the dose equivalent value, the accumulated dose equivalent value, etc. The operation unit 34 for inputting / instructing and connecting to and controlling them, calculating and recording the dose equivalent value and the cumulative dose equivalent value from the radiation dose rate, and warning signals and display signals based on the measurement results And a dosimeter control unit 35a having an information recording unit that records information such as personal identification information, entry / exit time, exposure dose equivalent value, etc. in time series for each lending of the dosimeter, Power supply unit 36 consisting of secondary batteries and power supply unit 36 charged with dosimeter A battery charging connection section 37 which connects to the output device 1, and a data connection unit 38 or the like for exchanging information of the information recording portion and externally.
[0024]
The above information recording unit has become feasible because a large-capacity memory has become available at a low price. Judging from the number of rented dosimeters 3a, the past information necessary for personal dose management can be obtained. All information can be stored in the dosimeter. As a result, if necessary information is retrieved and organized from the stored information, management data necessary for personal dose management can be created. In the prior art, the entrance / exit management device and the central computer are used. This makes it possible to accurately and easily grasp detailed personal exposure management data that could not be grasped only by the method described above.
[0025]
If the capacity of the information recording unit is insufficient to record all the past information of the dosimeter, it can be deleted from the old part of the information, or if necessary, the old part can be deleted by determining the period. You only have to transfer to another memory.
[Example of personal dose management system]
FIG. 1 is a block diagram showing a configuration of an embodiment of an individual dose management apparatus 2 according to the present invention.
[0026]
This personal dose management device 2 is equipped with the data storage type dosimeter 3a described in “Examples of dosimeters”, charges the secondary battery of the dosimeter 3a, and lends this dosimeter 3a. A device that incorporates the function of a charge lending device. In addition to the function of a conventional dosimeter charge lending device, it reads the personal identification information and inputs this personal identification information to the dosimeter to search the accumulated data of the dosimeter. An input / output unit 21 is provided for instructing conditions and outputting search results, and the control unit 17a organizes and aggregates the retrieved data with functions for exchanging various information and data with the dosimeter 3a. And a function for grouping them into a predetermined format.
[0027]
This will be described in more detail with reference to FIG.
As is clear from the above description, the personal dose management apparatus 2 is mainly composed of a data storage type dosimeter 3a and a dosimeter charging / lending apparatus unit 1a, to which an input / output unit 21 is added, and a control unit 17a. The following new functions have been added.
The dosimeter charging and lending apparatus unit 1a is equipped with ten dosimeters 3a arranged side by side in one stage, and the number of stages is adjusted according to the number of necessary dosimeters 3a. FIG. 1 shows a 10-unit unit 10a that can be equipped with 10 dosimeters 3a side by side. At the front of the dosimeter charging and lending unit 1a, a bezel serving as both a decorative plate and an insertion port for the dosimeter 3a is attached. The bezel corresponds to each dosimeter 3a, and the dosimeter 3a A status display 11 indicating whether the battery is “charging” or “charge completed” and a lending switch 12 for unlocking the dosimeter 3a when a business operator borrows the dosimeter 3a that has been charged. Is provided.
[0028]
The ten-unit unit 10a includes a charging electrode pin 14 that connects the battery charging connection portion 37 of the dosimeter 3a to charge the secondary battery of the dosimeter 3a and holds the dosimeter 3a, the dosimeter 3a, and the dosimeter 3a. Information electrode pin 15a for transmitting / receiving information to / from charge lending apparatus unit 1a, limit switch 16 as a position detection switch for detecting wearing of dosimeter 3a, status display unit 11 and lending switch 12 10 sets of connectors (not shown), a charging circuit unit 18 for charging a secondary battery of the dosimeter 3a, detecting a charging state and generating a charging state signal, and a control unit 17a having the following functions I have.
[0029]
The control unit 17a receives a signal indicating that the dosimeter 3a is mounted from the limit switch 16 and issues a charging start signal to the charging circuit unit 18, and receives a signal indicating the charging state of the secondary battery from the charging circuit unit 18 to The status display unit 11 displays “medium” or “charge completed”, receives the signal from the lending switch 12, and unlocks the dosimeter lock mechanism 13 of the dosimeter 3a that has been charged. 3a can be extracted, and information such as personal identification information and entry / exit time from the input / output unit 21 is transmitted to the dosimeter 3a and recorded in the dosimeter 3a. The necessary data is read from the accumulated data of the dosimeter 3a in accordance with the search condition, and these are organized and aggregated and output to the input / output unit 21. In other words, in addition to the function of the conventional control unit, the control unit 17a searches for necessary information from the information recording unit of the dosimeter 3a and a function for recording various information in the information recording unit of the dosimeter 3a. And a function as an information search means for organizing and summarizing them.
[0030]
Such ten-unit units 10a are arranged, for example, vertically in 10 stages and connected to a common power source 19 to constitute a dosimeter charging / lending apparatus unit 1a.
The information electrode pin 15a records personal identification information, entry / exit time, etc. in the information recording part of the dosimeter 3a, or exposure during the designated period of the worker to be searched from the information recording part of the dosimeter 3a. In order to read information such as dose equivalent values and entry / exit time, the dosimeter connection means is connected to the information connection unit 38 which is the information connection means of the dosimeter 3a.
[0031]
The input / output unit 21 is used to input personal identification information reading means for reading personal identification information such as an ID number from personal identification means such as an ID card and information instructions to be read from the information recording unit of the dosimeter 3a. It comprises input means such as a keyboard, and output means such as a printer or a display device that outputs search results based on instructions.
This personal dose management device 2, the data storage-type dosimeter 3a and dosimeter charger renting machine unit 1a mainly are configured This output unit 21 is added, and work in a controlled area Since information related to exposure such as past dose equivalent values of workers and entry / exit times is recorded in the information recording section of the dosimeter 3a, the desired data is searched from the information as necessary. The personal exposure dose can be managed accurately, in a short time, and easily, and can be managed in detail, and the level of management and the reliability are improved.
[0032]
In order to search for desired data with the personal dose management device 2, it is necessary that all the dosimeters 3a have been returned to the dosimeter charging and lending device unit 1a. Therefore, even if a search condition is input from the input / output unit 21, the search is not executed while there is an unreturned dosimeter 3a, and the search is started after all dosimeters are returned. Of course, the search may be started simultaneously with the input of the search condition, but the search is not completed while there is an unreturned dosimeter, and the return of the dosimeter is a necessary condition for the search to be completed. Therefore, the search is executed, for example, at night or on holidays when all dosimeters 3a are returned.
[0033]
Judging from the recent increase in memory capacity, it is considered possible to store all information records up to the useful life of the dosimeter 3a in the information recording part of the dosimeter 3a. For example, the old information may be deleted, or if necessary, information that has passed a certain period may be transferred to another memory.
[0035]
【The invention's effect】
According to the present invention is provided with the various means for outputting the input and results instruction input information and search criteria such as personal identification information, every time the dosimeter is borrowed, borrowed it information necessary for the personal radiation dose management of personal identification information and entering and leaving frequency during time of workers is input and recorded in chronological order in the information recording portion of the dosimeter, and the exposure dose in borrowing in addition to these The equivalent value is also recorded in the information recording unit. Therefore, for work performed by borrowing dosimeters, the above-mentioned information related to the work is always recorded in any of the dosimeters, and can be retrieved from the information in the information recording section of all attached dosimeters. For example, data necessary for personal dose management can be obtained reliably, and data required for personal dose management can be obtained accurately, easily and in a short time without using an entrance / exit management device and central computer. The reliability of individual dose management is also improved.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an embodiment of an individual dose management apparatus according to the present invention. FIG. 2 is a block diagram showing a configuration of an embodiment of a dosimeter according to the present invention. FIG. Fig. 4 is a block diagram showing the configuration of an example of a conventional dosimeter charging and lending device. Fig. 5 is a block diagram showing the configuration of an example of a conventional rechargeable dosimeter.
1 Dosimeter charging equipment
1a Dosimeter charging and lending unit
10, 10a 10-unit
11 Status display section 12 Lending switch
13 Dosimeter lock mechanism 14 Charging electrode pin
15 Electrode pin 15a Information electrode pin
16 Limit switch 17, 17a Control unit
18 Charging circuit section 19 Power supply 2 Personal dose management system
21 Input / output unit 3 Dosimeter
3a Data storage type dosimeter
31 Radiation detector 32 Display
33 Alarm section 34 Operation section
35, 35a Dosimeter control unit 36 Power supply unit
37 Battery Charging Connection 38 Information Reading Connection 4 Entrance / Exit Management Device 5 Central Computer

Claims (1)

When a worker working in a radiation control area enters the radiation control area, it is borrowed and carried by the worker from a personal alarm dosimeter charging / lending device, and the worker is exposed in the radiation control area. the dose equivalent value of the radiation recorded by measuring the, an alarm is when dose equivalent value reaches the set value, is returned to the personal alarm dosimeter charger and lending instrument during retraction pass from the radiation controlled area further, each time being borrowed by business operations personnel, borrowed workers at least the personal identification information and the arrival time and Shisaiki time and dose equivalent value in borrowing and for time series records and the information recording portion, a that have an information connection means personal alarm dosimeter for exchanging information with the personal alarm dosimeter charger and loan system to multiple attachment, those individuals alarm dosimeter Charge and rent An individual dose management device with a built-in function of personal alarm dosimeters charging and lending unit of Sutame,
Personal identification information reading means for reading personal identification information;
An input means for inputting an instruction of information read from the personal alarm dosimeter,
Dosimeter connection connected to personal alarm dosimeter information connection means to input personal identification information and entry / exit time etc. to personal alarm dosimeter or to read information of personal alarm dosimeter information recording section Means,
Information retrieval means for executing the instructions;
Output means for outputting search results based on the instructions,
By receiving the personal identification information from the personal identification information reading means and receiving the personal alarm dosimeter loan request, the rental request time is set as the entry time, and the entrance time is combined with the personal identification information, the information recording unit of the personal alarm dosimeter And returning the personal alarm dosimeter as a withdrawal time, and recording the withdrawal time together with the personal identification information and the entry time in the information recording unit of the personal alarm dosimeter,
Personal alarm dosimeters borrowed by business personnel record the equivalent dose value until it is returned to the information recording unit together with the personal identification information and entry time,
Based on the instruction input from the input means, the information search means searches the information instructed from the information recording part of all the personal alarm dosimeters attached through the dosimeter connection means, and the search result Personal output dose management apparatus characterized by causing the output means to output .

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