Development of the SMART plant model using the modular modeling system (MMS)

A transient simulation model of an integral reactor plant, SMART, has been developed using a commercially available computer code package, Modular Modeling System (MMS). Several MMS modules are developed which represent the non-standard major components of the integral reactor, such as a once-through steam generator, self-pressurized pressurizer, core, preheater, etc. The MMS SMART model is then developed by combining the developed modules with the standard modules from the MMS Macro libraries. The whole plant system including the plant control logics are modeled as one integrated model. Benchmark calculations have been carried out in order to verify the developed MMS modules and the SMART model. These calculations cover steady-state conditions at various power levels, performance related events, a limited number of safety related events. The analysis results of the MMS SMART model were compared with those from design computer codes and showed good agreement. This MMS SMART model runs faster than real time in a Personal Computer in the MicroSoft Windows NT environment and it can be used for various purposes because of its fast, modular and flexible features