Advanced management of pipe wall thinning based on prediction-monitor fusion

KOJIMA Fumio¹, and UCHIDA Shunsuke²

1. Organization of Advanced Science and Technology, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe 657-8501 Japan (kojima@koala.kobe-u.ac.jp)
2. Institute of Applied Energy, 1-14-2, Nishi-Shimbashi, Minato-ku, Tokyo 105-0003 Japan (suchida@jae.or.jp)

Abstract: This article is concerned with pipe wall thinning management system by means of hybrid use of simulation and monitoring. First, the computer-aided simulation for predicting wear rate of piping system is developed based on elucidation of thinning mechanism such as flow-accelerated corrosion (FAC). The accurate prediction of wear rate allows us the useful information on region of interest of inspection. Secondly, several monitoring methods are considered in accordance with interest of inspection. Thirdly, probability of detection (POD) is considered for the reliability of inspection data. The final part of this article is devoted to how to improve safety performance under the hybrid use of predicting and monitoring on the proposed pipe wall management.
Keyword: nuclear safety; simulation; inspection; flow-accelerated corrosion; probability of detection