JPS63215986A - Exposure dose measuring and control system for each working place - Google Patents

Abstract

PURPOSE:To enable an exposure dose to be determined for every place (for every job) and more accurate control to be executed by reading information stored in a pocket dosimeter by a reader when a controlled area is left behind. CONSTITUTION:A reader 2 is provided in common for a radiation controlled area. The controlled area is divided into a plurality of working places and setting units 3(3a-3n) are provided in correspondence with the working places. The radiation dose in the controlled area is measured by a pocket dosimeter 1. Radiation exposure dose and working time classified by the working places are stored in the corresponding dosimeter 1 by the setting unit 3 and information stored in the dosimeter 1 is read by the reader 2 when the controlled area is left. Thus, the exposure dose and the working time are measured and controlled for every working place. By storing information on places capable of being entered in the dosimeters 11 in advance or via the reader 2, entrance into unnecessary places is stopped. Further, The setting allowable staying time and allowable exposure dose for every working place, staying time and the exposure dose are restricted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system for measuring and managing exposure doses within a radiation controlled area.

[Conventional technology]

Conventionally, radiation exposure doses have been measured in units of areas where exposure doses should be controlled (hereinafter referred to as control areas). That is, as shown in Fig. 2, one reading device 2 is provided in one controlled area, and the total exposure amount from when the pocket dosimeter 1 passes through this reading device 2 until it returns is read by the reading device 2. I'm looking forward to it. Note that the pocket dosimeter 1 has a radiation detection section 11. as shown in FIG. 2A. Timer section 1
2) Data communication section 13. Control unit 14. It includes an alarm unit 15, a memory 16, etc., and has data transmission and processing functions, and measures the amount of radiation. Further, the reading device 2 includes a control section 21, a personal identification (ID) card reading section 22, as shown in FIG. 2B. Memory 23. Dosimeter communication section 24. The host computer communication section 25, gate control section 262, clock 27, display section 28, etc. also have data transmission/reception and data processing functions. Note that the ID card is used for personal identification, and it is determined whether or not to permit entry into the managed area.If permission is not granted, entry is denied by a gate (not shown).

[Problem that the invention seeks to solve]

However, the above method has a problem in that it is not possible to know the exposure dose for each work location (work subject). The problem with the above method is that it is only possible to get an overall picture, and it is not possible to analyze things like how much radiation exposure should be done in what places (or work), and it is not possible to perform detailed management. There is.

Therefore, it is an object of the present invention to make it possible to grasp the K exposure dose by location (by work) and to enable more accurate management.

[Means for solving problems]

A reading device that is commonly installed in the radiation controlled area, a setting device that divides this controlled area into multiple work areas and is installed corresponding to each of them, and a pocket dosimeter that measures the small amount of radiation within the controlled area. The radiation exposure dose and working time for each work location are stored in each pocket dosimeter by each setting device, and the information stored in each pocket dosimeter is read by a reading device when leaving the controlled area. , to measure and manage exposure doses and working hours for each work location.

[Effect]

1 for each work location within the controlled area (work subject)
Install a clock setting device that is coded and set, and each time the worker works at that location, insert the pocket dose needle into the setting device, enter the location code of the setting device, and start work.
Store the end time and measured dose in the pocket dosimeter,
By reading this data with a reader when exiting the controlled area, the exposure dose for each work location (work subject) can be accurately evaluated.

In addition, before entering a controlled area or when entering a controlled area, the work place (work subject) for each work place in the controlled area is coded and stored in the pocket dosimeter, and each time you work at a work place, the pocket dosimeter ! Insert the 1iiiit meter into the setting device. Compare the work location (work subject) code stored in the meter with the code in the setting device itself, and if there is a match, the entry is permitted, and if there is no match, the entry is prohibited. and control worker access to the work area.

Furthermore, a pocket dosimeter with a time alarm function is used to code the work location (work subject) for each work location within a controlled area before entering the controlled area or at the time of entering the controlled area, and the corresponding stay time. Memorize this and insert the pocket dose needle into the setting device each time you work at the work site. The setting device compares the work place (work subject) code stored in the Mffi meter with the code of the setting device itself, and displays the time alarm of the pocket dosimeter for the stay time corresponding to the matching work place (work subject). Set it as a set value, start a time alarm, and enable time management using the Mffi meter.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the present invention.

As is clear from the figure, one control area is divided into a plurality of work areas A, B..., N, and setting devices 5a, 5b..., 3n are installed in each of them. It will be done. Each setting device has a restraining section 31. as shown in FIG. 1A. The line company account communication unit 52) is composed of a memory 632, a display unit 342, a clock 35, and a setting unit 36, and has data transmission/reception and data processing functions. Note that the setting device can be made portable.

The operation will be explained below.

(1) When a worker enters a controlled area, the reading device 2 records the entry time ('ro) in the i-pocket dosimeter 1.

At this time, the measured dose of the pocket dosimeter 1 has been reset (No.
Work title) Code A2 Time (TAI) and measurement line f
f1CN person 1) is stored in pocket dosimeter 1. When finishing work at work location A and moving to the next work location,
Insert the pocket dosimeter into the setting device 3a again, and check the work location code A2 time (TA2') and measurement line M (NA2
) t: Stored in pocket dosimeter 1. From now on, similar operations will be carried out at other work places, and when leaving the controlled area, the reading device 2 will read the data stored in the pocket dosimeter 1, and the radiation exposure shelter at each work place will be identified as shown in the table below. It can be calculated as follows.

In addition, when leaving the area, by reading the time (TL) and measurement line jt (NL) at the time of leaving with the reading device 1, the total exposure dose for the total working time can be calculated (TL
Of course, it can be evaluated as (To) and (NL No).

In addition, workers entering the controlled area must have a pocket dosimeter with a work location (work subject) code stored in it before entering the controlled area, or use the reader 2 to read the pocket dosimeter 1 to the work location (work subject) code. Subject) Memorize the code. If the worker is new to the workplace, he or she inserts the pocket dose needle into the setting device 5a. The setting device 3a reads the work place (work subject) code stored in the pocket dose needle, compares it with the code of the setting device itself, and if there is a match, entry is allowed; if there is no match, entry is allowed. Display of prohibited entry and control of workers' access to the work area. Similar controls will be carried out at other work locations.

Furthermore, before entering the controlled area, workers must carry a pocket dosimeter with a work location (work subject) code and the corresponding stay time memorized, or read the pocket dosimeter using the reader 2. 1 stores the work location (work subject) code and the corresponding stay time. When a worker is new to the workplace, he or she inserts a pocket dosimeter into the setting device 3a. The setting device 6a reads the work place (work subject) code stored in the pocket dosimeter, compares it with the code of the setting device itself, and sends the matching work place (work subject) K corresponding stay time to the pocket dosimeter. Set it as an alarm setting value and start counting the time alarm.1And, if you are new to the workplace and the pocket i-quantity needle time alarm is issued, immediately leave the work place. Work place A
When leaving after finishing the work, the pocket dosimeter is inserted into the setting device 3a again to stop and reset the time alarm count. Similar controls will be carried out at other work locations.

[Efficacy of invention]

According to this invention, since the exposure dose can be measured for each work place, there is an advantage that accurate and detailed management is possible. Furthermore, if the setting device is made portable, the work area can be easily subdivided or changed, and management can be carried out in accordance with reality.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 1A is a block diagram showing a specific example of a setting device, Fig. 2 is a block diagram showing a conventional example, and Fig. 2A is a specific example of a pocket 11 meter. FIG. 2B is a block diagram showing a specific example of the reading device. Description of symbols 1... Pocket dose needle, 2... Reading device, 3 (3a to 5n)... Setting device, 11...
... Radiation detection section, 12 ... Timer section, 15
, 24, 25. 52... Communication Department, 14, 21,
31...Control unit, 15...Alarm unit, 1
6,25.55...Memory, 22...
ID card reading section, 26...Gate control section, 2
7゜35...Clock, 28.54...Display section, 36...Setting section. Agent Patent Attorney Akio Namiki Agent Patent Attorney Kiyoshi Matsuzaki Figure 1 Management r: Completed F5 @ 1 person Figure 2 Figure 2B?

Claims (1)

[Scope of Claims] 1) A reading device commonly provided in a radiation controlled area; a setting device that divides the controlled area into a plurality of work areas and is provided corresponding to each of the working areas; It is equipped with a pocket dosimeter for measuring the amount of radiation, and each setting device stores the radiation exposure dose and working time for each work place in the corresponding pocket dosimeter, and the information stored in each pocket dosimeter is stored in the pocket dosimeter. An exposure dose measurement and management system for each workplace, characterized by measuring and managing exposure doses and working hours for each workplace by reading them with the reading device when leaving a controlled area. 2) In the exposure dose measurement and management system for each workplace as set forth in claim 1, by storing information on accessible locations in the pocket dosimeter in advance or via a reader, unnecessary A work place exposure dose measurement and management system that is characterized by preventing entry into the place. 3) In the exposure dose measurement and management system for each work place as set forth in claim 2, the stay time and exposure dose are limited by setting the allowable stay time and allowable exposure dose for each work place. A radiation dose measurement and management system for each workplace, which is characterized by: