配管減肉保全管理の高度化に向けた研究調査活動

（5. 減肉管理への漏洩リスク評価の適用可能性の検討）

抄録

As one of the major activities of the JSME research committee for the improvement of pipe wall thinning management, latest knowledge concerning pipe wall thinning phenomena and state of the inspection technologies of wall thickness have been surveyed and reviewed. Although a complete management of pipe wall wastage consists of prediction, inspection and evaluation, survey of the evaluation part has been running late compared to the prediction and inspection parts. Survey of “Risk-Informed Inservice Inspection (RI-ISI)” was recently initiated in the research committee. In this paper, investigation results about the risk assessment procedure which was developed by the Electric Power Research Institute (EPRI) is introduced. In EPRI's RI-ISI procedure, leakage risk due to pipe failure is evaluated by consequence categories and pipe failure potential. The risk is categorized into seven level and the inspection method or input resources of inspection are determined according to the risk level.