Method for measuring alpha radiation pollution on inner surface of abnormal pipeline based on RPC (Remote Position Control) technology
A technology for measuring systems and inner surfaces, applied in the direction of radiation intensity measurement, etc.
Inactive Publication Date: 2012-08-15
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to use RPC (Resistive Plate Ionization Chamber) detectors to detect α-radiation pollution on the inner surface of special-shaped pipelines in the decommissioning of nuclear facilities. ion pair
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[0023] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0024] figure 1 It is a block diagram of the measurement system for α-radiation pollution on the inner surface of special-shaped pipelines based on RPC technology. Specifically include: the measured special-shaped pipeline, air extraction device, gas purification device, working gas, gas distribution instrument, RPC test box, RPC detector, preamplifier, high-voltage power supply and data acquisition unit; the air extraction device extracts the measured special-shaped pipeline The internal gas is input to the gas distribution instrument together with a certain proportion of working gas after filtering the particulate matter in the air through the gas purification device; the RPC detector is placed inside the RPC test box, and the mixed gas output by the gas distribution instrument is installed in the RPC test box. The air inlet (9) on the RPC detector en...
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The invention provides a method for measuring the alpha radiation pollution on an inner surface of an abnormal pipeline based on an RPC (Remote Position Control) technology. The system specifically comprises an abnormal pipeline to be detected, an air exhausting device, an air purifying device, working gas, an air distribution instrument, an RPC test box, an RPC detector, a prepositioned amplifier, a high-voltage power supply and a data acquisition unit. The air exhausting device exhausts the gas in the abnormal pipeline to be detected, and the gas and the working gas cane input into the air distribution instrument through the air purifying device; the PRC detector is placed in the RPC test box; the mixed gas output by the air distribution instrument enters a detection flexible region (1) of the RPC detector through an air inlet (9) on the RPC test box; the high-voltage power supply is connected with a graphite high-voltage electrode (16) of the RPC detector through a high-voltage connector (8) on the RPC test box; and the output signal of the RPC detector is connected with the data acquisition unit through the prepositioned amplifier. The RPC detector detects an electronic signal in the mixed gas so as to realize the detection of the alpha radiation pollution on the inner surface of the abnormal pipeline.
Description
technical field [0001] The invention relates to the field of nuclear waste treatment, in particular to a system and method for measuring α nuclear radiation pollution on the inner surface of a special-shaped pipeline in the decommissioning of nuclear facilities. Background technique [0002] Since the operation of my country's nuclear industry, a number of nuclear facilities have entered or are about to enter the decommissioning stage one after another. In the decommissioning or decommissioning plan, the decommissioning of special-shaped pipelines of nuclear facilities has attracted enough attention. The radiation pollution detection technology and evaluation method for the decommissioning of special-shaped pipelines is one of the key technical issues in the whole decommissioning. For the investigation and measurement of the characteristics of special-shaped pipelines in nuclear facilities, as well as the subsequent decontamination, treatment, disposal and other issues, ther...
Claims
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Inventor 丁卫撑
Owner CHENGDU UNIVERSITY OF TECHNOLOGY