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Personal dose-meter calibrating panorama irradiation device

A technology of irradiation device and panoramic irradiation, applied in dosimeter and other directions, to achieve the effect of reducing volume, effective shielding thickness, and high repeatability of source in place

Inactive Publication Date: 2008-04-09
中国人民解放军63960部队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No patents related to personal dosimeter calibration panoramic irradiation device equipped with a Cs-137γ source with an activity not greater than 11.1GBq (300mCi) have been found in domestic and foreign patents

Method used

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  • Personal dose-meter calibrating panorama irradiation device

Examples

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Effect test

example 1

[0024] Such as figure 1 As shown, the panoramic irradiation device is loaded with 11.1GBq (300mCi) 137 The Csγ source, the radioactive source is installed on the upper end of the source rod supported by a long-stroke cylinder rod, and is located in the source tank. The source tank is a cylindrical lead container φ180mm×278mm, the lower end is connected to the cylinder and the support system, and the upper end is a round shutter. When irradiating, the circular shutter rotates and opens, and the cylinder pushes the radiation source out to realize panoramic irradiation. After the irradiation is completed, the cylinder returns the source to the source storage tank, and the circular shutter closes to ensure sufficient shielding. Due to the fast pneumatic speed, the transition dose is reduced and the accuracy of irradiation is ensured.

[0025] The irradiation platform is a plexiglass ring with a diameter of 1.55m fixed on an aluminum ring. The low atomic number material is used ...

example 2

[0030]Fix the personal dosimeter on the irradiation bracket (1) before irradiation, move the irradiation device to the middle position of the irradiation room by moving the base (14) during irradiation, level it and fix it, and open the circular shutter (6) during irradiation, and then the cylinder ( 8) Push the radioactive source (7) to the center of the disk and start irradiation. At this time, the irradiation disc is driven to rotate by the irradiation platform drive motor (9), and after the preset time of irradiation, the cylinder (8) retracts the radiation source (7), and the circular shutter (6) is closed.

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Abstract

The invention discloses a Cs-137 Gamma-source panoramic exposure apparatus with individual dosimeter calibration and the degree of activity of the invention is not larger than 11.1 GBq (300m Ci). The invention adopts the technique of barrel shutter to open and close a mask channel, and uses a long-stroke air cylinder to push out radioactive source from a storage jar rapidly, and a rotary platform with multiple exposure directions which is placed with the individual dosimeter rotates around the radioactive source, which ensures the even irradiation of the individual dosimeter. The invention uses a remote controller to control the running of the apparatus (setting the irradiation time for automatic irradiation is included), and the invention is provided with a safety door rod, audible and visual alarm, and the safety of an enhanced test system of source availability. The invention can be used for the test and calibration of single or batch X and Gamma individual dosimeters (including TL sheets), and the placement of active or passive individual dosimeters for irradiation which are composed of various detecting elements and have all sizes and shapes. The invention can be taken as a standard apparatus in the department that detects and calibrates radioactive dosage, and the invention can be used for the calibration of individual dosimeters in the field of nuclear facility such as nuclear plants, as well as the field of medical treatment, and the service departments specializing in individual dosage.

Description

technical field [0001] The invention relates to a personal dosimeter calibration panoramic irradiation device, which belongs to the field of ionizing radiation measurement. It can be widely used in the calibration of personal dosimeters in radiometric verification and calibration departments, nuclear facilities such as nuclear power plants, medical fields, and personal dose assurance service departments. Background technique [0002] In foreign countries, companies or service centers authorized to be responsible for personal dose monitoring have specially designed personal dosimeter calibration irradiation systems. For example, Chiyoda Security Products Co., Ltd. in Japan has a special irradiation room and a large device, and the source used is Cs- 137, activity about 185GBq (5Ci), panoramic irradiation; Seibersdorf dosimetry laboratory in Austria developed a personal dosimeter calibration irradiation system using a pneumatic source return system, there are 4 Cs-137 sources ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/02
Inventor 胡长江郭文沙雪刚刘传香
Owner 中国人民解放军63960部队
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