Evaporative release model in KP-SAM for source term evaluation

SAM (System Analysis Module) is a systems code developed by ANL for advanced reactor system and safety analysis. It takes advantage of U.S.DOE's object-oriented application framework MOOSE, and modern software development environment and numerical methods to ensure the quality of the code. KP-SAM is the branch of SAM code with specific models for KP-FHR designed by Kairos Power, LLC. KP-SAM is primarily designed for heat transfer and single-phase fluid dynamics, but it has been recently enhanced to include the models for source term transport and release. One of the enhancements is a new evaporative release model, which is presented here.