Risk assessment Methodology for Heat Transfer Tube Failure in a Sodium-Molten Salt Heat Exchanger for Sodium-Cooled Fast Reactor Coupled to Molten Salt Thermal Energy Storage System

As part of the development of safety assessment technologies for sodium-cooled fast reactor coupled to thermal energy storage (TES) system with sodium-molten salt heat exchanger (HX), the database on the number of heat transfer tube failure in molten salt HX and the exposure time of concentrated solar power (CSP) system to molten salt was surveyed on the basis of reported practices of accidents in the existing CSP systems with the molten salt TES system.Using the database, a risk assessment methodology of the heat transfer tube failure frequency was also studied with a Bayesian estimation method to obtain a risk insight for improving the HX.