Safe monitoring method for radioactive source during flaw detection

A technology for safety monitoring and radioactive sources, applied in radiation measurement, radiation intensity measurement, material analysis using radiation, etc. Avoid off-source effects

Inactive Publication Date: 2015-01-07
SICHUAN TONGJIA ENVIRONMENTAL PROTECTION TECH
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Problems solved by technology

[0003] Due to the frequent use of industrial flaw detection radioactive sources and complex working conditions, source jamming and source-off accidents (mainly source whips falling off) are prone to occur in

Method used

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  • Safe monitoring method for radioactive source during flaw detection

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Embodiment Construction

[0018] The invention is a method for safety monitoring of radioactive sources in flaw detection operations, mainly aimed at the safety monitoring of industrial flaw detection radiation sources, which mainly include α particle, β particle and γ ray radiation source (including iridium 192, cobalt 60), the source of radioactive source The braid is the transmission mechanism used to transport the radioactive source. The source braid of the radioactive source for industrial flaw detection is a transmission device that sends the source out of the source tank and retrieves it.

[0019] see figure 1 Shown: a safety monitoring method for radioactive sources in flaw detection operations, equipped with a corresponding flaw detection automatic control device, including a device body and a monitor. The monitor is connected to the flaw detection automatic control device body and the monitor line in the flaw detection area. The body of the flaw detection automatic control device is separated...

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Abstract

The invention discloses a safe monitoring method for a radioactive source during flaw detection. The method comprises the following steps: (1) when an automatic control instrument sends out a radioactive source working signal, comparing and analyzing by a central processor to obtain a result that the radiation dose rate of the radioactive source acquired by a radiation dose rate signal acquisition module is increased based on the background radiation dose rate and reaches the radiation dose rate of a source storage device, and obtaining that the radioactive source works normally; (2) when the automatic control instrument sends out a radioactive source storage signal, comparing and analyzing by the central processor to obtain a result that the radiation dose rate of the radioactive source acquired by the radiation dose rate signal acquisition module is reduced to be less than 30% of the radiation dose rate of the source storage device, and judging that the radioactive source works normally; comparing and analyzing by the central processor to obtain a result that the radiation dose rate of the radioactive source acquired by the radiation dose rate signal acquisition module is still not reduced to be less than 30% of the radiation dose rate of the source storage device, judging that the radioactive source is not recovered in the source storage device and the radioactive source works abnormally, and giving an alarm by an alarm module to finish the safe monitoring process.

Description

technical field [0001] The invention relates to the field of radiation source monitoring, in particular to a method for safety monitoring of radiation sources in flaw detection operations. Background technique [0002] my country is a big country in the production and use of radioisotopes, and radioactive sources have been widely used in industry, agriculture, medicine, resources, environment, military, scientific research and other fields. There are 1,500 units using radioisotope and radiation devices in Sichuan Province, and more than 3,700 radioactive sources are in use, of which gamma sources account for more than 80%. In recent years, incidents of loss and theft of radioactive sources due to poor management and other reasons have occurred from time to time, leading to many radioactive pollution accidents and seriously threatening the lives and health of the people; according to Tianjin Environmental Protection Bureau: On May 7, 2014, Tianjin Hongdi Engineering Inspecti...

Claims

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Application Information

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IPC IPC(8): G01N23/18G01T1/18G01T7/12G08B21/18
Inventor 潘强刘安全廖方俊郭先静
Owner SICHUAN TONGJIA ENVIRONMENTAL PROTECTION TECH
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