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Zero Thickness and Reference Demarcating Method for the Deposition Detection of Corrosion Products in PWR Primary System

[+] Author Affiliations
Xiaolei Cheng, Qian Yu, Fang Liu

North China Electric Power University, Beijing, China

Xiaoping Ouyang

Northwestern Institute of Nuclear Technology, Xi’an, Shaanxi, China

Paper No. ICONE21-15215, pp. V001T04A007; 3 pages
  • 2013 21st International Conference on Nuclear Engineering
  • Volume 1: Plant Operations, Maintenance, Engineering, Modifications, Life Cycle and Balance of Plant; Nuclear Fuel and Materials; Radiation Protection and Nuclear Technology Applications
  • Chengdu, China, July 29–August 2, 2013
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5578-2
  • Copyright © 2013 by ASME


A nondestructive detection method based on radiation detecting technology has been design to inspect the deposition of corrosion products in Pressurized Water Reactor (PWR) Primary system. The zero thickness and reference demarcating method could measure the thickness of the corrosion products deposited inside the pipeline without the γ attenuation coefficient of the pipeline, coolant and the corrosion products which are necessary in the normal Nondestructive detection yet hard to be controlled and accurately obtained. With this method, the wall thickness and the inner diameter of the pipeline are not required during detection. The thickness of the corrosion products could be measured by only five parameters which could be monitored on-site real time: the gamma intensity at Measured Angle I, the gamma intensity at standard angle I0, the length of the demarcating sample Z, the gamma intensity through the sample of corrosion products Ip and the gamma intensity through the sample of coolant Ic. With this method, the space distribution of the corrosion products inside the pipeline could be measured outside intuitively and conveniently. This method could also be applied to research the transport mechanisms of corrosion products in PWR Primary system, as the reference of the study on Primary water chemical.

Copyright © 2013 by ASME



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