SASSYS analysis for PRISM UTOP with air dump HX for safety tests

A PRISM reactor and intermediate heat transport system were modeled using the SASSY-1 code with heat rejection by either a steam generator or an air dump heat exchanger (ADHX). An ADHX is considered in order to decrease prototype safety test costs. Analysis results were compared for an unprotected transient overpower (UTOP). The simple SASSYS steam generator model was benchmarked to General Electric UTOP results using ARIES-P. A comparison of the benchmarked SASSYS steam generator model results obtained with an ADHX show an ADHX can adequately simulate steam system transient response for the PRISM UTOP.