CTF: A modernized, production-level, thermal hydraulic solver for the solution of industry-relevant challenge problems in pressurized water reactors

NEAMS Burnup Extension Accomplishments and Remaining Modeling Gaps

“…The TRACE solution was used to provide boundary conditions for limiting pins modeled by BISON; however, a very coarse radial meshing approach was used that lumps assemblies in the core into five regions. Because of the effect of fuel rod performance gradients on FFRD susceptibility, it was determined that a study should be performed to investigate the impact of significantly increasing the resolution of the thermal hydraulic solution so that every pin and coolant channel in the core is explicitly modeled using the CTF subchannel code [25].…”

Coupled Decay Heat and Thermal Hydraulic Capability for Loss-of-Coolant Accident Simulations

“…CTF is a subchannel TH code that can be used to solve reactor problems [15]. It contains a wide range of correlations that allow it to solve single-or two-phase flow for both normal operating conditions and accident scenarios.…”