Experiences and future plan for risk-informed decision making in Korea

A program for establishing regulatory framework on the use of risk information has been underway since 1995, and several trial applications have been done to evaluate the applicability and usefulness of risk-informed approach to nuclear power plant regulation. The program consists of fifteen general and/or specific items of interest and pilot applications will be initiated in 2003. In parallel, research and development program has been continued to support the regulatory implementation. A task force team has been formed and the official channel has also been opened for cooperation between regulatory body and utility-related organizations. Specifically, a couple of trial applications have been done up to now. First, the risk-based inspection (RBI) program has been implemented to improve regulatory inspection framework by utilizing risk information obtained from plant specific PSA and worldwide operating experiences. Next, optimization of technical specifications has been applied for surveillance test intervals (STIs) and allowed outage time (AOT). (author)