Hybrid computer simulation of the LOFT plant

A real-time hybrid computer simulation of the LOFT facility has been developed to predict dynamic plant response to both normal and abnormal operating conditions. The report contains a detailed description of the analytical basis for the LOFT plant simulation. The current simulation contains the following plant components: reactor core, vessel, primary coolant loop, pressurizer, PPS, steam generator, air-cooled condenser, condensate receiver, feedwater subcooler, steam generator water level control system and air-cooled condenser pressure control system. These individual component models are functionally integrated on an Applied Dynamics System 511 hybrid computer to form the total plant simulation. The LOFT plant simulation has been recently used to analyze plant response to a variety of postulated accidents for the LOFT FSAR. Future tasks requiring use of the simulation include verification of zero power physics test procedures, analysis of plant maneuvering procedures and continued operator training