Measurement system for distinguishing dissolved corrosion products from deposited corrosion products

By designing a measurement system including a gamma detector, measuring pipeline and flow meter, the problem of the inability of the prior art to distinguish the dissolved state and deposit corrosion products is solved, and accurate measurements are achieved when the coolant is present, and measurement accuracy is improved.

CN222704736UActive Publication Date: 2025-04-01LINGDONG NUCLEAR POWER +1
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Patent Information

Application Number
CN202421125637.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-21
Publication Date
2025-04-01
Estimated Expiration
2034-05-21

AI Technical Summary

Technical Problem

The prior art cannot distinguish the dissolved corrosion products from the deposition corrosion products in the presence of coolant in the first circuit system pipeline of the pressurized water reactor nuclear power plant, resulting in the inability to accurately measure the surface activity of the deposition corrosion products.

Method used

A measurement system is designed, including a first gamma detector, a second gamma detector, a measuring pipe, a pipe decontamination device and a flow meter. Through the arrangement of horizontal and vertical pipe sections, using the combination of gamma detector and flow meter, it is possible to distinguish the dissolved state and deposit corrosion products in the presence of coolant, and calculate the respective surface activity through data processing.

Benefits of technology

The surface activity of dissolved states and deposited corrosion products is accurately distinguished and measured by non-destructive measurements outside the tube when the coolant is present, and the measurement accuracy is improved.

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Abstract

The utility model discloses a measuring system for distinguishing dissolved corrosion products and deposited corrosion products, which comprises a first gamma detector, a second gamma detector, a measuring pipeline, a pipeline decontamination device and a flow velocity meter, and the measuring pipeline comprises a horizontal pipeline section and a vertical pipeline section which are communicated with each other. Dissolved corrosion products flow from the horizontal pipeline section to the vertical pipeline section, the first gamma detector is installed at a first measuring point of the horizontal pipeline section, the second gamma detector is installed at a second measuring point of the vertical pipeline section, and the pipeline decontamination device is installed on the vertical pipeline section. And two ends of the pipeline decontamination device are respectively connected to the upstream and the downstream of the second measuring point. According to the measurement system for distinguishing the dissolved corrosion product from the deposited corrosion product, the deposited corrosion product and the dissolved corrosion product can be distinguished through out-of-pipe nondestructive measurement under the condition that a coolant exists in a loop pipeline, so that the surface activity of the deposited corrosion product is obtained.
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