“…In FY16, the core follow results were included in the MPACT V&V manual, even though the calculations were performed with VERA-CS multiphysics involving neutronics, thermal-hydraulics, and fuel temperature modeling. In FY17, a plan was formulated to develop a VERA-CS Verification and Validation manual [20] to include the core follow results. Therefore, the validation results in versions 4-5 of the MPACT manual included only single physics validation data, which include primarily the critical experiments and Cycle 1 start-up testing.…”