Evaluation Method for Pipe Wall Thinning Due to Liquid Droplet Impingement - (I) Overview

Abstract

The analysis code system, DRAWTHREE-LDI has been developed in order to evaluate pipe wall thinning due to liquid droplet impingement (LDI). The wall thinning due to LDI is classified into two types which are LDI (corrosion) and LDI (erosion). In LDI (corrosion), the dominant mechanism to dwindle pipe wall thickness is flow-accelerated corrosion which is a chemical process. While in LDI (erosion), it is impact onto wall surfaces due to droplet impingement which is a physical process. The comparison between results calculated by DRAWTHREE-LDI and those measured at an actual power plant shows good agreements within a factor of two.