Piping sYstem, Risk management based on wAll thinning MonItoring and preDiction
The PYRAMID project is an International Collaborative Research Project (PRCI), which brings together French public laboratories (MATEIS and LVA at INSA Lyon, and CEA), an International Joint Unit (ELyTMaX at CNRS - Tohoku Univ. and Univ. de Lyon), Japanese public laboratories (IFS, and GSE at Tohoku University, GSST at Gunma University), and the Nuclear Technology Research Laboratory at CRIEPI a non profit research foundation, supported by the electrical japanese industries.PYRAMID project aims to develop new tools and techniques to detect and quantify wall thinning due to Slurry Flow induced Corrosion (SFC) in piping systems. SFC is a special case of Flow Accelerated Corrosion (FAC) in presence of a flow with a high concentration of debris of various kinds (concrete, corrosion, metallic…).Corrosion modes and rate will be predicted by numerical simulations at any position for actual layouts of piping systems such as elbows. These predictions will be validated by electrochemical experiments under controlled mass transfer coefficient.Also Ultrasonic Non Destructive Testing (UT) methods will be designed with the help of simulations and their performances will be investigated in corrosion test facilities. The adequate signal processing techniques based on Bayesian approaches will be developed.The final goal is to provide a risk management system based on prediction-monitoring of wall thinning due to SFC.