Some Aspects in High Quality Reliability Data Collection and Analysis

Living probabilistic safety assessment of nuclear power plant requires quantitative reliability parameters. To obtain high quality reliability data in complicated systems such as nuclear power plant, there needs to understand hardware such as plant, systems, and components, and to consider software such as culture, human, management, organization, and to understand plant life cycles such as design, installation, operation and maintenance in a wholly integrated manner. Now we are in a situation to set up of a new establishment of reliability database systems in Korea for living PSA in near future. A few but not less important cases to be reminded which I have experienced during the very initial phase of reliability data collection and analysis for the sample plant and components are introduced here. (author)