Survey on the recent research trends for the fire events analysis

This report aims at looking onto the recent research trends for the fire events analysis including PSA(Probabilsitc Safety Assessment) methodology. The objective of the internal fire events analysis is to estimate the contribution of the in-plant fires to overall plant core damage frequency and to identify the vulnerabilities to fire-induced events. Recently fire PSAs, have been performed for various types of reactors. The increasing capacity of PSA has enabled more detailed modeling for all aspects of the fire PSA including fire growth, suppression and the impact on systems. However, due to the lack of experimental data or validated models for key issues (e.g., fire growth, the impact of fire on equipment and operator performance), the results of current fire PSAs have significant uncertainties. Accordingly, the recent research trends for the fire events analysis in the report will be based on the fire PSA research to reduce the conversatism and the uncertainties in Korea