Technology Based on Wall-Thinning Prediction and Numerical Analysis Techniques for Wall-Thinning Analysis of Small-Bone Carbon Steel Piping

In approximately fifty utilities, including KHNP (Korea Hydro & Nuclear Power), CHECWORKS is used as a tool for predicting and managing the wall thinning of carbon steel piping this wall thinning is caused by flow-accelerated corrosion (FAQ. It is known that CHECWORKS is only applicable to predict the wall thinning of piping with large bores. When dealing with small bore steel piping FAC engineers measure the thickness of the susceptible area that is selected on the basis of the experience and judgment of tie engineer. This paper proposes the application of CHECWORKS for the management of wall thinning of small bore piping. Four small bore pipelines of a domestic nuclear power plant were analyzed from the viewpoints of FAC and fluid dynamics by using CHECWORKS and FLUENT code. Depending on the engineer's skill, CHECWORKS can also be used for the management of wall thinning of small bore piping.