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A method for measuring radiation dose distribution and unevenness of products

A technology of irradiation dose and measurement method, applied in the field of product irradiation quality control in irradiation processing, can solve the problems of cumbersome, heavy workload, loss, etc.

Active Publication Date: 2020-04-14
JIANGSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the dosimeter is placed before irradiation to track the entire irradiation process of the product, and it cannot be remedied afterwards; the second is that a dosimeter can only represent one site. inaccurate location or broken or missing dosimeters, you will not get the desired results
The commonly used method of deploying dosimeters is very cumbersome and requires a lot of work

Method used

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  • A method for measuring radiation dose distribution and unevenness of products
  • A method for measuring radiation dose distribution and unevenness of products
  • A method for measuring radiation dose distribution and unevenness of products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1, the determination of the unevenness of irradiation dose of dehydrated vegetables and jujube.

[0052] Dehydrated vegetables and jujube packing cartons are 30×25×20cm 3 , 25×25×20cm 3 ,Co 60 γ-irradiation, using dynamic suspension, spreader 55×85×160cm 3 , the predetermined irradiation dose is 6kGy, 2kGy. Select 2 positions in the spreader filled with dehydrated vegetables and red dates: the top position min (minimum dose position), the front 3 / 4 position max (maximum dose position), and mark on the outer surface of the carton ( before or after irradiation), samples were taken within 2 days after irradiation. Tear open the above carton, cut out 2.5×4cm from the interlayer of the inner wall of the carton at the mark 2 Paper, weighing 0.135g, curled into a cylinder, kneaded, stuffed into the ESR test tube along the tube wall, and pushed into the bottom of the tube with a special stainless steel shovel, compacted, so that the sample height is between 2.5-...

Embodiment 2

[0058] Embodiment 2, electron beam irradiated dressing and mask dose unevenness measurement.

[0059] Dressing and mask packaging carton specifications are 60×28×35cm 3 、30×25×27cm 3 , electron beam irradiation (10MeV), under the beam transport adopts the plate chain transmission method, the predetermined irradiation dose is 10, 15kGy. Select 2 points on the flat surface and the edge of the dressing and mask packaging carton respectively: the edge min (minimum dose), the center max (maximum dose), and mark on the outer surface of the carton (irradiation before and after), samples were taken within 7 days after the irradiation was completed. Tear open the above carton, cut out 2.5×4cm from the interlayer of the inner wall of the carton at the mark 2 Paper material, weighing 0.150g, curled into a cylinder, kneaded, stuffed into the ESR test tube along the tube wall, and pushed into the bottom of the tube with a special stainless steel shovel, compacted, so that the sample hei...

Embodiment 3

[0064] Embodiment 3, measurement of X-ray irradiation blood collection needle and glove dose unevenness.

[0065] The specifications of cartons for blood collection needles and gloves are 65×38×35cm respectively 3 、40×35×67cm 3 , X-irradiation (5MeV), under-beam transportation adopts crawler transmission, and the predetermined irradiation dose is 25, 35kGy. Select 2 points respectively on the flat surface and the edge of the lancet and glove packaging carton: edge min (minimum dose), center max (maximum dose), and mark on the outer surface of the carton (radiation Both before and after irradiation), samples were taken within 15 days after the irradiation was completed. Tear open the above carton, cut out 2.5×4cm from the interlayer of the inner wall of the carton at the mark 2 Paper material, weighing 0.150g, curled into a cylinder, kneaded, stuffed into the ESR test tube along the tube wall, and pushed into the bottom of the tube with a special stainless steel shovel, comp...

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Abstract

The invention discloses a product irradiation dose distribution and ununiformity determination method. The method is characterized in that a packaging box or a determination paper which undergoes irradiation treatment together with a product is selected, to-be-determined paper materials are extracted from different sites, ESR signals of the paper materials are determined, product irradiation dose distribution and ununiformity are calculated according to positive correlation between the ESR signals induced by irradiation from the paper materials and product irradiation dose. The method is advantaged in that arranging a dosimeter before irradiation treatment to track the whole irradiation process of the product is not necessary, and a dosimeter break or loss problem does can be avoided; for thousands of boxes of products, manpower and detection cost can be substantially saved, and half dose depth of electron beam irradiation and effective range determination can be determined.

Description

technical field [0001] The invention relates to a product radiation quality control technology in radiation processing, especially a technology for measuring the unevenness and distribution of radiation doses of gamma, electron beam and X-ray products. The EPR signal in the material, the method of calculating the radiation dose distribution and unevenness of the product. Background technique [0002] Irradiation technology refers to the use of high-energy rays (γ, electron beams and X-rays) to irradiate food, medical supplies, chemical materials and "three wastes" to achieve the purpose of product preservation, disinfection and modification. It has many advantages such as no temperature rise, no environmental pollution, no preservative residue, fast, no need to open the package, and convenient industrial production. During the irradiation process, the irradiation quality of the product is achieved through radiation dose control. In order to make the product or material ach...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/02
CPCG01T1/02
Inventor 赵永富汪敏李俐俐
Owner JIANGSU ACAD OF AGRI SCI
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