インフラストラクチャー管理とリスク評価

抄録

This article summarized a session held in the 2019 annual meeting of Society for Risk Analysis in Japan, in which risk management and risk assessment on infrastructures were discussed after three topical presentations. The first speaker, Dr. Sakai talked about “Risk based maintenance for plant safety”. Next, Dr. Muta talked about “Probabilistic risk assessment of nuclear power plant”. Finally, Dr. Taki talked about “Implementation of the risk-based floodplain management: Shiga experience”. This session focused to seek common methods and common problems across the field of infrastructure management. We found a common approach hidden in infrastructure systems, such as setting safety goal in the metrics of frequency of accident. We observed some difference in risk estimation methodologies. For example, hazard (i.e. adverse effect) of flood can be quantitatively estimated in the field of floodplain management using hydrology and geology techniques, however, hazard at an accident of engineering plant has been not always quantitatively estimated due to its complicated mechanism and the risk assessment approaches were often qualitative. It is important to share knowledge on risk analysis methods and its application for infrastructure risk management among professional of various fields of risk analysis.