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http://dx.doi.org/10.14773/cst.2012.11.6.218

A Study on the Thermal Hydraulic Analysis and B-Scan Inspection for LDIE Degradation of Carbon Steel Piping in a Nuclear Plant  

Hwang, Kyeong Mo (KEPCO E&C)
Lee, Dae Young (KEPCO E&C)
Publication Information
Corrosion Science and Technology / v.11, no.6, 2012 , pp. 218-224 More about this Journal
Abstract
Liquid droplet impingement erosion (LDIE) known to be generated in aircraft and turbine blades is recently appeared in nuclear piping. UT thickness measurements with both A-scan and B-scan UT inspection equipments were performed for a component estimated as susceptible to LDIE in feedwater heater vent system. The thickness data measured with B-Scan equipment were compared with those of A-Scan. Thermal hydraulic analysis based on ANSYS FLUENT code was performed to analyze the behavior of liquid droplets inside piping. The wall thinning rate and residual lifetime based on both existing Sanchez-Caldera equation and measuring data were also calculated to identify the applicability of the existing equation to the LDIE management of nuclear piping. Because Sanchez-Caldera equation do not consider the feature of magnetite formed inside piping, droplet size, colliding frequency, the development of new evaluation method urgently needs to manage the pipe wall thinning caused by LDIE.
Keywords
liquid droplet impingement erosion; flow accelerated corrosion; UT inspection; thermal hydraulic analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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