MODULAR MODELING SYSTEM (MMS): A CODE FOR THE DYNAMIC SIMULATION OF FOSSIL AND NUCLEAR POWER PLANTS, OVERVIEW AND GENERAL THEORY, FINAL REPORT

ABSTRACT:
The Modular Modeling System (MMS) is a computer code developed by EPRI to facilitate modeling the dynamics of fossil-fueled and nuclear steam electric power plants. It is intended to assist in the power plant design process and during later operation for troubleshooting, setting control

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system gains, validation of simulators, checking operating procedures, and forecasting the consequences of severe transient tests before they are actually run. The code is able at present to model fossil-fueled plants of almost all conventional configurations, pressurized water reactor (PWR) coolant systems, and the balance of plant of both boiling water reactor (BWR) and PWR plants. Enhancements scheduled for release in early 1984 will permit the MMS to model BWR nuclear steam supply system components in normal operation and PWR reactor coolant systems which have been breached and are experiencing two-phase flow. The MMS provides preprogrammed modules that represent power plant components. These are automatically interconnected in the arrangement determined by the user by a high-level simulation language which is an integral part of the MMS. The language also provides a run time executive, the integration algorithm, linear analysis routines, and many user convenience features. This report provides the theoretical basis of the MMS, a description of each module, and an executive summary that describes the present status of the code and its major features, together with the validation and testing that it has undergone. Full documentation of the MMS is found in the Computer Code Manual, which is available to users under license to EPRI.
A. F. Armor, Project Manager; F. K. L. Wong, Project Manager Coal Combustion Systems; S. M. Divakaruni, Project Manager; J.P. Sursock, Project Manager Nuclear Power Division

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