Electronic exposure dose meter and radiation handling operation management system employing the same

• US 20020195572A1
• Filed: 03/15/2002
• Published: 12/26/2002
• Est. Priority Date: 06/05/2001
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Matsui, Tetsuya, Kono, Naoyuki, Kitaguchi, Hiroshi, Ushiroda, Kouichi, Fukutsuka, Naoya
• Granted Patent: US 6,891,476 B2
• Time in Patent Office: Days
• US Class Current: 250/472.1
• CPC Class Codes: G01T 1/026 Semiconductor dose-rate meters
• CPC Class Codes: G01T 7/00 Details of radiation-measuring instruments

Abstract

An electronic exposure dose meter and a radiation handling operation management system is capable of realizing real time exposure management. The radiation handling operation management system has monitoring unit receiving an exposure dose amount measured by an electronic exposure dose meter having a radiation detector, its counter circuit and a PHS transmission and reception antenna, from a plurality of transmission and reception base station installed in a radiation handling operation site through bidirectional communication with a central management section via an external management base station, and deriving position of user of the electronic exposure dose meter for collecting and displaying position and exposure dose amount of the user. The electronic exposure dose meter has a radiation detector, a counter circuit, a PHS antenna for bidirectional communication with a central management section. The electronic exposure dose meter generates an alarm in response to an instruction signal from the central management section.

Claims

1. A radiation handling operation management system comprising:

monitoring unit receiving an exposure dose amount measured by an electronic exposure dose meter having a radiation detector, its counter circuit and a PHS transmission and reception antenna, from a plurality of transmission and reception base station installed in a radiation handling operation site through bidirectional communication with a central management section via an external management base station, and deriving position of user of said electronic exposure dose meter for collecting and displaying position and exposure dose amount of the user.

6. A radiation handling operation management system as set forth in claim 1 or 3, wherein a display unit installed in said central management section displays a position of user of each electronic exposure dose meter at the radiation handling operation side, a moving route and accumulated exposure dose amount of each individual or particular group on the basis of collected data of the position of the individual user of the electronic exposure dose meter or a plurality of users of the electronic exposure dose meters.

7. A radiation handling operation management system as set forth in claim 1 or 3, wherein the position of user of each electronic exposure dose meter or moving route of the user is displayed on the basis of a CAD data of the radiation handling facility.

8. A radiation handling operation management system as set forth in claim 1 or 3, wherein a display unit installed in said central management section displays a radiation dose rate distribution in the radiation handling operation site on the basis of collected data of the position of the individual user of the electronic exposure dose meter or a plurality of users of the electronic exposure dose meters.

9. A radiation handling operation management system as set forth in claim 1 or 3, which further comprises an on-site display unit in said radiation handling operation site to display information equivalent to a display content of a display unit installed in said central management section.

10. A radiation handling operation management system as set forth in claim 1 or 3, which further comprises a beanie light provided in said radiation handling operation site for generating an alarm upon entry of worker having no permission to enter into the radiation handling operation site to monitor through bidirectional communication.

11. A radiation handling operation management system as set forth in claim 1 or 3, wherein the radiation handling site and different external organization are connected through internet or telephone circuit for monitoring condition of radiation handling operation of the radiation handling operation site and providing instruction with a computer and a display unit provided in said external organization.

12. A radiation handling operation management system as set forth in claim 11, which directly provides instruction for operation to a management section of particular site or radiation handling operation site through said internet or telephone circuit.

2. An electronic exposure dose meter comprising:

a radiation detector;

a counter circuit counting a radiation detection signal from said radiation detector;

a PHS antenna for bidirectional communication with a central management section; and

means for generating an alarm in response to an instruction signal transmitted from said central management section.

4. An electronic exposure dose meter as set forth in claim 2, wherein said electronic exposure dose meter generates an alarm, such as audible alarm, vibration and so on the basis of information transmitted from said central management section via said management base station.

5. An electronic exposure dose meter as set forth in claim 2, which further comprises an external input switch for notifying abnormality to said central management section.

3. A radiation handling operation management system comprising:

monitoring unit deriving a position of a user of an electronic exposure dose meter by receiving an exposure dose amount measured by said electronic exposure dose meter and transmitted through a plurality of transmission and reception base station, on the basis of reception signals output from said plurality of transmission and reception base station, and storing said position, said exposure dose amount and date and time with correspondence therebetween.

13. A radiation handling operation management system comprising:

monitoring unit receiving an exposure dose amount measured by an electronic exposure dose meter having a radiation detector, its counter circuit and a wireless communication unit, from a plurality of transmission and reception base station installed in a radiation handling operation site through bidirectional communication with a central management section via an external management base station, and deriving position of user of said electronic exposure dose meter for collecting and displaying position and exposure dose amount of the user.

14. An electronic exposure dose meter comprising:

a radiation detector;

a counter circuit counting a radiation detection signal from said radiation detector;

a wireless communication unit for bidirectional communication with a central management section; and

means for generating an alarm in response to an instruction signal transmitted from said central management section.