This report presents the modeling of the core of a generic pebble-bed reactor (PBR) at the
system level using the System Analysis Module (SAM) code. This work is an extension of a
previous work by the authors (Ooi et al.(2021)) that used the so-called 2-D ring model
approach to model the PBMR-400. With the new approach, the pebble bed of the reactor is
modeled with multiple PBCoreChannel components with spherical heat structures which
allows the code to calculate thermal fluid parameters with built-in closure relations. The new …

To meet future energy demand, while producing safe, reliable, and carbon-free energy,
nuclear reactors will be needed. Before operating these systems, designers must be sure
that they can operate these systems efficiently and safely in a variety of different scenarios.
To have the capability of evaluating different control approaches given component
degradation for a Pebble-Bed High-Temperature Gas-cooled Reactor (PB-HTGR), a system
model consisting of the System Analysis Module (SAM) coupled to Simulink is developed …