JP2002098766A - Personal warning dosemeter, and device for controlling personally exposed dose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a personally exposed dose controlling device for work in a controlled area capable of executing personal exposed dose control easily compared with a system by a coming-in and -out zone control device and a central computer. SOLUTION: This device 2 is composed of a borrowed data accumulation type dosemeter 3a provided with an information recording part for recording time-serially information relating to respective exposed doses for workers, a dosemeter charging lending device part 1a for attaching the dosemeter 3a, and an input and output part 21 connected to a control part 17a of the device part 1a. Borrowed times, return times and exposed dose-equivalent values in entry within the area are recorded in borrowed order in the information recording part of the dosemeter 3a to correspond to each personal identification number, and the information satisfying a condition of a personal control data is retrieved out of all the recorded information in the dosemeter 3a to provide the personally exposed dose control data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the work of working in a radiation control area (hereinafter abbreviated as a control area) such as a laboratory for handling X-ray generators and accelerators or a characteristic calibration site of a radiation measuring instrument. Personal alarm dosimeter (hereinafter abbreviated as dosimeter) for measuring the radiation dose equivalent value (hereinafter abbreviated as the dose equivalent value) that the worker was exposed in the controlled area, and the radiation exposure for each worker The present invention relates to a personal exposure dose management device for managing a dose (personal exposure dose).

[0002]

2. Description of the Related Art The management of personal exposure dose when a large-scale control area such as a nuclear power plant is provided mainly includes an access control device 4 and a central computer 5 as shown in FIG. Individual dose management systems are commonly employed. In this case, when entering the management area, the worker who works in the management area first needs to set a personal person installed outside the entrance of the entrance / exit area management device 4 which is also an entrance to the management area. A rechargeable dosimeter 3 is borrowed from an alarm dosimeter charging / renting device (hereinafter abbreviated as a dosimeter charging / renting device) 1, and then the dosimeter 3 is set in the entrance / exit area management device 4. And the entry / exit area management device 4 has personal identification means, for example, I
The personal identification information is read from the D card. The entrance / exit area management device 4 transmits the read personal identification information such as an ID number to the central computer 5, and the central computer 5 uses the information to determine the dose equivalent value of the worker who has already been exposed (the exposure equivalent value). ) Etc., and judges whether the worker can enter the area, and in the case where the worker is permitted to enter the area, transmits the already-exposed dose equivalent value, the alarm setting value, etc. to the entrance / exit area management device 4 and sends it to the dosimeter 3. Then, the gate of the entry / exit area management device 4 is opened. The worker enters the management area with the dosimeter 3 in which the personal identification information, the already-exposed dose equivalent value and the like are written, 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, keeps the gate closed, and rejects the entry of the worker.

A dosimeter 3 carried by a patient measures the dose equivalent value during the entrance, and the dose equivalent value or the cumulative dose equivalent value obtained by accumulating the dose equivalent value with the existing dose equivalent value is the allowable dose equivalent value. When an alarm set value set from is reached, an alarm is issued to notify the worker. The alarm set value is set in consideration of an allowable level for the entire period, an allowable level for each operation, and the like.

A worker who leaves the management area sets the dosimeter 3 carried by the user on the entrance / exit management device 4 and sets the dosimeter 3
, The entry / exit area management device 4 reads the personal identification information and the exposure dose equivalent value during the entry, the cumulative exposure dose equivalent value, and the like. 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 employee is allowed to exit based on the information. The gate of the device 4 is opened to remove the worker.
At this time, the worker removes the dosimeter 3 set in the access control device 4 from the access control device 4 and carries it.
Leave the control area and go to the dosimeter charging and lending device 1 dosimeter 3
Is returned. In the case of no exit, the gate of the entrance / exit management device 4 is not opened, and the worker is stopped by the entrance / exit management device 4 and a clerk is called. Thereafter, the worker acts according to the instructions of the staff.

[0005] The personal exposure dose management system as described above is a system employed when a large-scale management area such as a nuclear power plant is provided. On the other hand, if the controlled area is much smaller, such as a laboratory that handles X-ray equipment or accelerators, or a calibration site for radiation measurement equipment,
Without the entrance / exit area management device 4 and the central computer 5, the personal exposure dose management by the film batch or the combined use of the film batch and the dosimeter used in the above system is adopted.

Of course, in this case, too,
It is managed so that the annual total dose equivalent does not reach the allowable upper limit of 50 mSv. In the case of film batches, one reading is usually done by development once a month.
Monthly dose equivalent values are read and recorded. If there is a possibility that the dose equivalent has increased, an intermediate reading is added as necessary. In the case of a dosimeter,
Each time a person enters the management area, the exposure dose equivalent value measured by the dosimeter is read from the display of the dosimeter and recorded, and is counted and managed in a predetermined period unit such as a month unit. .

[0007] Dosimeters used for such management include:
A rechargeable dosimeter 3 which is collectively housed in the dosimeter charging and lending device 1 as described above and is charged each time it is returned, and a battery built-in type driven by a battery which is replaced as necessary There is a dosimeter. In the case of the rechargeable dosimeter 3, resetting the exposure dose equivalent value data measured in the previous use to zero is performed by returning the dosimeter to the dosimeter charging and lending device 1, and the built-in battery type dose meter is used. In the case of a total, it is executed by turning the power off / on. The data is reset to zero because lending of dosimeters is not dedicated. When the dosimeter is dedicated to each worker, it is not necessary to reset the dosimeter to zero every time the worker enters the management area, but may reset it to zero every predetermined period.

FIG. 5 is a block diagram showing an example of the configuration of a conventional rechargeable dosimeter 3. As shown in FIG. The dosimeter 3 includes a radiation detection unit 31 that measures a radiation dose rate in a work environment, a display unit 32 that displays a measurement result and the like, and an alarm unit 33 that issues an alarm when the dose equivalent value or the like reaches an alarm set value. And an operation unit 34 for inputting / instructing an instruction to display the dose equivalent value on the display unit 32, and the like, and connected thereto and controlling them, and the radiation dose equivalent value and the cumulative dose from the radiation dose rate. A dosimeter control unit 35 that calculates and records the equivalent value and outputs an alarm signal, a display signal, and the like based on the measurement result, a power supply unit 36 including a secondary battery, and the power supply unit 36 as the dosimeter charging and lending device 1. And a battery charging connection part 37 connected to the battery.

The dosimeter with a built-in battery has almost the same configuration as the dosimeter 3 described above, except that the power supply 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 to obtain an exposure dose equivalent value. The dose equivalent value during the entrance and the accumulated dose equivalent value obtained by adding this dose equivalent value to the existing dose equivalent value are the dosimeter control unit.
Recorded in 35 recording areas. The exposure dose equivalent value or the like is read out by the entrance / exit area management device 4 when leaving the area and transmitted to the central computer, or read out from the display unit 32 and recorded by the worker after leaving the area.

The dosimeter 3 returned to the dosimeter charging and lending device 1 is connected to the dosimeter charging and lending device 1 through a battery charging connection 37, and the secondary battery of the power supply 36 is charged for the next use. Is done. FIG. 4 is a block diagram showing a configuration of a conventional dosimeter charging and lending device 1. Normally, the dosimeter charging and lending device 1 is equipped with ten dosimeters 3 arranged side by side in a single stage, and in the case of a personal exposure dose management system as shown in FIG.
In many cases, one device is constituted by stages or ten stages. However, in the case of a small management area, the number of stages is adjusted according to the required number of dosimeters 3.

FIG. 4 shows a ten-unit unit 10 to which ten dosimeters 3 can be mounted side by side. On the front of the dosimeter charging and lending device 1, a bezel that serves as a decorative plate and an insertion slot for the dosimeter 3 is attached, and the dosimeter 3 corresponding to each dosimeter 3 is attached to this bezel. Status display that indicates whether charging is in progress or charging is complete
11 and a rental switch 12 for unlocking the dosimeter 3 when the worker borrows the charged dosimeter 3.

The ten-unit unit 10 includes a charging electrode pin 14 for connecting the battery charging connection part 37 of the dosimeter 3 to charge the secondary battery of the dosimeter 3 and holding the dosimeter 3, and a dosimeter 3. , An electrode pin 15 for holding the dosimeter 3, a limit switch 16 as a position detection switch for detecting the mounting of the dosimeter 3, a connector (not shown) to the status display section 11 and the lending switch 12, and a secondary There are provided 10 sets of a charging circuit section 18 for charging a battery, detecting a state of charge and issuing a signal of the state of charge, and a control section 17 having the following functions.

The control unit 17 receives a signal indicating that the dosimeter 3 is mounted from the limit switch 16, issues a charge start signal to the charge circuit unit 18, and receives a charge state signal of the secondary battery from the charge circuit unit 18. Status indicator to indicate whether charging is in progress or charging is complete.
11, the dosimeter lock mechanism 13 of the dosimeter 3 that has been fully charged in response to the signal from the lending switch 12 is unlocked, and the dosimeter 3 can be removed. Such 10-units 10 are arranged, for example, vertically in 10 stages and connected to a common power supply 19 to constitute the dosimeter charging and lending device 1.

[0014]

SUMMARY OF THE INVENTION In the personal exposure dose management system described at the beginning of the "prior art", that is, the personal exposure dose management system mainly including an access control device and a central computer, the worker is required The exposure dose equivalent value during that time is transmitted to the central computer for each entry / exit area, and the central computer manages the radiation exposure state of each worker in detail.

However, in the management by the film batch, the check is generally performed on a monthly basis, and it is not possible to grasp the dose equivalent value on a daily basis, the working time in the management area, and the like from the film batch. In the management using a dosimeter, it is possible to grasp the exposure dose equivalent value on a daily basis from the transferred record, but it requires time for the transfer, and there is a concern about erroneous writing. Further, in order to grasp the work time, it is necessary to record the entry time and the exit time in addition to the exposure dose equivalent value each time a worker works in the management area.

According to the present invention, the dose equivalent value and the working time for each entry / exit area in the administration area can be easily and accurately grasped in a short time without using an entrance / exit area management device and a central computer. It is an object of the present invention to provide a personal exposure dose management device mainly composed of a dosimeter and a dosimeter charging / renting device.

[0017]

According to the first aspect of the present invention, when a worker who works in a management area enters the management area, the worker borrows and carries the dosimeter from the dosimeter charging and lending device, Measures and records the dose equivalent of radiation to which the worker has been exposed in the controlled area, issues an alarm when the dose equivalent reaches the set value, and charges the dosimeter when leaving the controlled area. A dosimeter that is returned to the lending device, and each time it is borrowed by a worker, at least personal identification information of the borrowed worker, entry time, departure time, dose equivalent value during borrowing, and And an information connection unit for exchanging information with the dosimeter charging and lending device.

In the information recording section of the dosimeter, at least the personal identification information of the worker who borrowed the dosimeter, the entrance / exit time, and the dose equivalent value during the borrowing are recorded in chronological order. By reading out necessary information from these information, it becomes possible to grasp or collate a desired control dose equivalent value and work time. The invention according to claim 2 is characterized in that the entry time is a time when a worker borrows the dosimeter from the dosimeter charging and lending device, and the leaving time is set by the worker to the dosimeter and the dosimeter charging and lending device. The return time.

It is possible to know the entry / exit time by borrowing and returning the dosimeter if the dosimeter charging / lending device is provided with a clock function. This is a method of grasping the entry / exit time. According to a third aspect of the present invention, a plurality of dosimeters according to the first aspect are mounted,
A personal exposure dose management device having a built-in function of a dosimeter charging and renting device for charging and lending those dosimeters, comprising: a personal identification information reading means for reading personal identification information; Input means for inputting instructions, etc., and connection to the dosimeter's information connection means for inputting personal identification information and entry / exit time etc. to the dosimeter and reading information from the information recording section of the dosimeter Dosimeter connection means, an information search means for executing the instruction, and an output means for outputting a search result based on the instruction. By receiving the lending request, the lending request time is set as the entry time, the entry time is recorded in the information recording section of the dosimeter together with the personal identification information, and the dosimeter is returned by return With the time as the departure time, the departure time is recorded in the information recording part of the dosimeter together with the personal identification information and the entry time, and the dose meter borrowed by the worker is exposed dose equivalent until returned. The value 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, all the dosimeters attached to the information search means via the dosimeter connection means are connected. The information instructed from the information recording unit is searched, and the search result is output to the output means.

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 to the information recording unit of the dosimeter via the dosimeter connection means. The exposure dose equivalent values that are recorded and borrowed by the dosimeter are recorded together with the information in the information recording unit of the dosimeter. Therefore, if necessary information is searched from the information recorded in time series in the information recording unit of all dosimeters attached to the dosimeter charging and lending device unit, it is necessary for personal exposure dose management. Data can be obtained accurately, easily, and in a short time.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a dosimeter and a personal exposure dose management device according to the present invention will be described using embodiments. It is to be noted that the same reference numerals are used for portions having the same functions as those of the conventional technology. [Embodiment of Dosimeter] FIG. 2 is a block diagram showing the configuration of an embodiment of the dosimeter according to the present invention.

In this embodiment, in addition to the function of the conventional dosimeter, each time the worker is borrowed, at least the personal identification information, the entry time, the departure time, and the borrowing time of the borrowed worker are used. A function of accumulating information for recording the exposure dose equivalent values in time series is added, and an information connection means for exchanging such information with the dosimeter charging / renting device is provided. That is, this dosimeter is a data storage type dosimeter.

This will be described in more detail with reference to FIG. The data storage type dosimeter 3a includes a radiation detection unit 31 that measures a radiation dose rate in a work environment, a display unit 32 that displays a measurement result and the like, and an exposure dose equivalent value that has been exposed during the current entrance or a value obtained by using the same. An alarm unit 33 that issues an alarm when the cumulative dose equivalent value accumulated in the existing dose equivalent value reaches a set level, and an instruction to display the dose equivalent value, the cumulative dose equivalent value, and the like on the display unit 32. And an operation unit 34 for inputting and instructing, and controlling them by connecting them, calculating and recording the dose equivalent value or the cumulative dose equivalent value from the radiation dose rate, and generating an alarm signal or a display signal based on the measurement result. Etc., and
Dosimeter control unit 35a equipped with an information recording unit that records information such as personal identification information, entrance / exit time, and exposure dose equivalent value every time the dosimeter is lent, and a power supply unit 36 composed of a secondary battery When,
It is composed of a battery charging connection section 37 for connecting the power supply section 36 to the dosimeter charging and lending device 1, an information connection section 38 for exchanging information of the information recording section with the outside, and the like.

The above-mentioned information recording section has been realized by the fact that a large-capacity memory has become available at a low cost, and is necessary for personal exposure dose management, judging from the number of lending of the dosimeter 3a. It is possible to save all information of the past in the dosimeter. As a result, if necessary information is searched and organized from the stored information, management data necessary for personal exposure dose management can be created. In the prior art, an access control device and a central computer are used. This makes it possible to accurately and easily grasp detailed personal exposure management data that could not be grasped otherwise.

If the capacity of the information recording unit is not enough to record all the past information of the dosimeter, the information is deleted from the old part, and if necessary, the period is determined. Just move the old part to another memory. [Embodiment of Personal Exposure Dose Management Apparatus] FIG. 1 is a block diagram showing the configuration of an embodiment of an individual exposure dose management apparatus 2 according to the present invention.

The personal exposure dose management device 2 is equipped with the data storage type dosimeter 3a described in "Embodiment of the dosimeter", charges the secondary battery of the dosimeter 3a, and charges the dosimeter 3a.
This device incorporates the function of a dosimeter charging and renting device that rents out, in addition to the function of the conventional dosimeter charging and renting device, reads personal identification information and inputs this personal identification information to the dosimeter, An input / output unit 21 for instructing search conditions of accumulated data and outputting search results is provided.The control unit 17a has a function of transmitting and receiving various information and data to and from the dosimeter 3a and a search data. A function for organizing / aggregating the data into a predetermined format is added.

This will be described in more detail with reference to FIG. As is clear from the above description, this personal exposure dose management device 2 mainly includes a data storage type dosimeter 3a and a dosimeter charging and lending device unit 1a, and an input / output unit 21 is added thereto, and a control unit 17a Has new features as described below.
The dosimeter charging and lending device unit 1a has ten dosimeters 3a mounted side by side on one stage, and the number of stages is adjusted according to the required number of dosimeters 3a. FIG. 1 shows a ten-unit unit 10a to which ten dosimeters 3a can be mounted side by side. On the front of the dosimeter charging and lending device section 1a, a bezel that serves as a decorative plate and an insertion slot for the dosimeter 3a is attached, and this bezel corresponds to each dosimeter 3a,
A status display section 11 indicating whether the dosimeter 3a is "charging" or "charging completed", and lending to unlock the dosimeter 3a when a worker borrows the charged dosimeter 3a. A switch 12 is provided.

The ten-unit 10a is connected to the battery charging connection part 37 of the dosimeter 3a to charge the secondary battery of the dosimeter 3a and to hold the dosimeter 3a with the charging electrode pin 14, and the dosimeter 3a. An information electrode pin 15a for exchanging information between the device and the dosimeter charging and lending device unit 1a, a limit switch 16 as a position detection switch for detecting the mounting of the dosimeter 3a, a status display unit 11 and A connector (not shown) to the rental switch 12,
The dosimeter 3a includes 10 sets of a charging circuit section 18 for charging the secondary battery and detecting the state of charge and generating a signal of the state of charge, and a control section 17a having the following functions.

The control unit 17a receives a signal indicating that the dosimeter 3a is mounted from the limit switch 16, sends a charge start signal to the charge circuit unit 18, and receives a charge state signal of the secondary battery from the charge circuit unit 18. The status display unit 11 to indicate `` charging '' or `` charging completed '' and release the lock of the dosimeter lock mechanism 13 of the dosimeter 3a that has been fully charged in response to the signal from the lending switch 12. , The dosimeter 3a can be extracted, and information such as personal identification information and entry / exit time from the input / output unit 21 can be
3a to have the dosimeter 3a record that information,
The necessary data is read from the accumulated data of the dosimeter 3 a in accordance with the search condition from the input / output unit 21, and these are arranged / aggregated and output to the input / output unit 21. In other words, the control unit 17a
In addition to the functions of the conventional control unit, a function for recording various information in the information recording unit of the dosimeter 3a, and searching for necessary information from the information recording unit of the dosimeter 3a to organize and total A function as information retrieval means has been added.

Such a 10-unit unit 10a is arranged, for example, vertically in 10 stages and connected to a common power supply 19 to constitute a dosimeter charging and lending unit 1a. The information electrode pin 15a
The personal identification information and the entry / exit time are recorded in the information recording section of the dosimeter 3a, and the exposure dose equivalent value and entry / exit area during the designated period of the worker to be searched from the information recording section of the dosimeter 3a. It is a dosimeter connection unit connected to the information connection unit 38, which is an information connection unit of the dosimeter 3a, for reading information such as time.

The input / output unit 21 inputs 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 inputs instructions and the like of information to be read from the information recording unit of the dosimeter 3a. And an output unit such as a printer or a display device for outputting a search result based on an instruction. This personal exposure dose management device 2 is
Is the data storage type dosimeter 3a and the dosimeter charging and lending unit 1a
The input / output unit 21 is added to this, and the exposure-related information such as the past dose equivalent value and the entrance / exit time of the worker who worked in the management area is stored in the dosimeter 3a. Since the information is recorded in the information recording unit, desired data can be retrieved and output from the information as needed, and the management of the personal exposure dose can be performed accurately, in a short time, and easily. And fine-grained management is possible,
The level of management and reliability will be higher.

In order to retrieve desired data with the personal exposure dose management device 2, all dosimeters 3a need to be returned to the dosimeter charging and lending device 1a.
Therefore, even if the search condition is input from the input / output unit 21, the search is not performed while the dosimeter 3a is not returned, and the search is started after all the 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 completion of the search. Therefore,
The search is executed, for example, at night or on holidays when all the dosimeters 3a are returned.

Further, judging from the recent increase in memory capacity, it is considered that it is possible to store all information up to the useful life of the dosimeter 3a in the information recording section of the dosimeter 3a. If there is a shortage, it is only necessary to take measures to delete old information or to transfer information after a certain period of time to another memory if necessary.

[0034]

According to the first aspect of the present invention, the information recording unit of the dosimeter stores at least the personal identification information of the worker who borrowed the dosimeter, the entry / exit time, the exposure dose equivalent value during the borrowing, and the like. Are recorded in chronological order in the order of borrowing. By reading out the necessary information from these information, it becomes possible to grasp or collate the desired management dose equivalent value and work time, and The data necessary for management can be accurately and easily grasped in a short time, and the reliability of individual dose management is improved.

According to the second aspect of the present invention, the entry / exit time is grasped by lending and returning the dosimeter. Since the dosimeter charging and lending device can be provided with a clock function, the dosimeter charging / leaving method is the most reliable and easiest method of ascertaining the entering / leaving time at no cost. According to the invention of claim 3, in addition to having the function of the dosimeter charging and lending device to which the dosimeter according to claim 1 is attached, input information such as personal identification information and instructions such as search conditions are input. In addition, every time a dosimeter is borrowed, information necessary for personal exposure management such as personal identification information of the worker who borrowed the dosimeter and entry / exit time is provided. The information is input and recorded in a time series in the information recording section of the dosimeter, and in addition, the exposure dose equivalent value during borrowing is also recorded in the information recording section. Therefore, for work performed using a dosimeter borrowed, the above information on the work is always recorded in one of the dosimeters, and can be retrieved from the information recording section of all dosimeters that are mounted. If necessary, it is possible to obtain data necessary for personal dose management accurately, easily, and quickly, without using an entry / exit area control device and central computer. And improve the reliability of personal dose management.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a personal exposure dose management device according to the present invention.

FIG. 2 is a block diagram showing the configuration of an embodiment of the dosimeter according to the present invention.

FIG. 3 is a conceptual diagram for explaining a conventional personal exposure dose management system.

FIG. 4 is a block diagram showing a configuration of an example of a conventional dosimeter charging and lending device.

FIG. 5 is a block diagram showing a configuration of an example of a conventional rechargeable dosimeter.

[Explanation of symbols]

 1 Dosimeter charging and renting device 1a Dosimeter charging and renting device section 10, 10a 10-unit unit 11 Status display section 12 Lending switch 13 Dosimeter locking mechanism 14 Charging electrode pin 15 Electrode pin 15a Information electrode pin 16 Limit switch 17, 17a Control unit 18 Charging circuit unit 19 Power supply 2 Personal exposure dose management device 21 Input / output unit 3 Dosimeter 3a Data storage type dosimeter 31 Radiation detection unit 32 Display unit 33 Alarm unit 34 Operation unit 35, 35a Dosimeter control unit 36 Power supply unit 37 Battery charging connection 38 Information reading connection 4 Access control device 5 Central computer

Claims (3)

[Claims] Claims: 1. When a worker working in a radiation control area enters the radiation control area, the worker borrows from the personal alarm dosimeter charging / renting device and is carried by the worker,
Measures and records the dose equivalent of the radiation that the worker has been exposed to in the radiation control area, issues an alert when the exposure dose equivalent reaches the set value, and gives an individual when leaving the radiation control area. Alarm dosimeter A personal alarm dosimeter that is returned to the charging / renting device.Every time it is borrowed by a worker, at least personal identification information, entry time, exit time, and borrowing of the borrowed worker are borrowed. An information recording unit for recording the exposure dose equivalent values in time series, and an information connection means for exchanging information with the personal alarm dosimeter charging / renting device. A personal alarm dosimeter characterized by the following. 2. The entry time is defined as the time when a worker borrows the personal alarm dosimeter from the personal alarm dosimeter charging / renting device, and the leaving time is defined as the worker using the personal alarm dosimeter. 2. The personal alarm dosimeter according to claim 1, wherein the time is returned to the alarm dosimeter charging / renting device. 3. A personal exposure dosimeter incorporating a plurality of personal alarm dosimeters according to claim 1 and having a function of a personal alarm dosimeter charging / renting device for charging and renting the personal alarm dosimeters. A personal identification information reading means for reading personal identification information; an input means for inputting instructions of information to be read from the personal alarm dosimeter; Dosimeter connection means connected to the information connection means of the personal alarm dosimeter for inputting the local time and the like and reading the information of the information recording unit of the personal alarm dosimeter, and information for executing the instruction A search means, and an output means for outputting a search result based on the instruction, and rented by receiving personal identification information from the personal identification information reading means and receiving a lending request for a personal alarm dosimeter. The request time is set as the entry time, the entry time is recorded in the information recording unit of the personal alarm dosimeter together with the personal identification information, and the return time is set as the exit time by returning the personal alarm dosimeter. Is recorded in the information recording unit of the personal alarm dosimeter together with the personal identification information and the entry time, and the personal alarm dosimeter borrowed by the worker records the exposure dose equivalent value until returned to the personal identification information and The information is recorded in the information recording unit together with the entry time, and based on the instruction input from the input unit, the information retrieval unit transmits the information from the information recording units of all the attached personal alarm dosimeters via the dosimeter connection unit. A personal exposure dose management device, characterized in that the designated information is searched and the search result is output to an output unit.