The Virtual Test Bed (VTB) is an open repository containing a wide variety of documented models supporting nuclear energy applications, primarily based on advanced reactor designs. The VTB is sponsored by the National Reactor Innovation Center (NRIC) and supports its mission by facilitating the application of advanced modeling & simulation (M&S) tools toward efforts to accelerate the deployment of innovative reactor concepts. A variety of tools are represented in these models, primarily those developed under the Nuclear Energy Advanced Modeling and Simulation (NEAMS) program. Models employing NEAMS codes are continuously tested and maintained so that they always run with current code versions.