Method of measuring and monitoring weight of UO2 pellets in single fuel rod in real time

Abstract

The invention provides a method of measuring and monitoring weight of UO2 pellets in a single fuel rod in real time. The method comprises the following steps: (1) automatically reading, by a barcode reading device, a barcode on a cladding tube, and then comparing the barcode with welding information in a database to determine whether the cladding tube is already welded; (2) automatically weighing the determined welded cladding tube by means of a weighing system; (3) conveying the cladding tube already loaded with pellets to a weighing position again, automatically reading, by the barcode reading device, the barcode on the cladding tube, and then comparing the barcode with weighing information in the database; (4) automatically weighing the cladding tube determined as being filled with pellets by means of the weighing system; and (5) assembling a fuel assembly, inquiring about the barcodes on the cladding tubes, and automatically reading and counting up the weight of the loaded UO2 pellets. The method in the invention increases the level of informationization of fuel rod weighing, achieves data tracing in weight data storage, and can achieve immediate obtaining of the weight of UO2 pellets in a single fuel rod and real-time monitoring on consumption fluctuation of UO2 pellets during the production of the fuel rods.

Description

technical field [0001] The invention relates to the technical field of pressurized water reactor nuclear power fuel assembly production, in particular to a real-time weighing and monitoring of UO in a single fuel rod 2 Pellet weight method. Background technique [0002] Fuel rods are an important part of AFA3G fuel assemblies. In order to account for the nuclear materials used in the production of fuel assemblies, it is necessary to calculate the UO consumed by each set of fuel assemblies 2 The pellet weight is counted. At present, the batch weighing method is used for statistics, that is, after the fuel rods pass the inspection, the operator manually groups 132 fuel rods into a batch, and then 3 people use the crane hook scale to weigh the fuel rods in batches, and then use the batch Subtract the weight of fuel rods to consume the sum of the weights of other components to obtain the consumed UO 2 Pellet weight. This method has a low degree of automation and a low degree...

AI Technical Summary

Problems solved by technology

This method has a low degree of automation and a low degree of informatization, and at the same time, the existing conditions cannot obtain the UO in a single fuel rod in time. 2 Pellet weight, resulting in inability to monitor fluctuations in fuel rod material consumption in time during production

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