In September 2018, WSC was awarded a contract by Battelle Energy Alliance (BEA) to provide a full upgrade the Idaho National Labs Advanced Test Reactor (ATR) Simulator. WSC is providing a full replacement of the environment and models including the reactor neutronics and thermal hydraulics of all systems with our 3KEYMASTER simulation system and modeling tools and is teaming with Studsvik to provide the ATR's serpentine-shaped core model using their RAMONA code. In addition to upgrading the environment and models, WSC will improve modeling of the radiation transport to allow a more integrated environment with the DRMS (radiation monitoring system), and provide interfaces with the MaxDNA virtual control system and the stimulated systems (CDS, IO and the DRMS). The updated simulator will include a full set of soft panel graphics to mimic the ATR control room. The 3KEYMASTER Instructor Station will provide access to thousands of generic malfunctions and custom malfunctions unique to the ATR and access to visually dynamic diagrams of all modeled systems.