A Review of Current Calculation Methods Used to Predict Damage from High Energy Arcing Fault (HEAF) Events

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Due to the potential safety significance of HEAF events the NEA initiated a project to provide an in-depth investigation on such events in NEA member states. The general objective of the study was to determine damage mechanisms, extent of areas affected, methods of protecting systems, structures and components (SSCs) and possible calculation methods for modeling of HEAF events as applicable to fire protection in nuclear power plants (NPP). 

This report therefore presents a review of the current calculation methods used to predict damage from HEAF events to SSC, a summary of the operating experience with HEAF events that have occurred in NPPs, and recommendations for additional research work needed to better understanding fire risks associated with HEAF events resulting from this task.