D4.1: Analysis of SMART plant with 1D system code and intercomparing between codes

This deliverable contains a description of the SMART reactor. Starting from the SMART reactor
description, two models are developed for the TRACE system code. In the first model, a 1D approach
is used for most components including the reactor core. In the second model, the 3D flow-solution
features are used to model the RPV and the core. Steady-state and transient calculations are
performed. For the transient calculation, the ATWS transient has been chosen. The ATWS transient
is a loss of normal feedwater without an automatic scram of the reactor. Finally, the results of the
simulated ATWS transient using the 1D and 3D system models are compared.