Potential for interactive/real time nuclear power plant simulation with RELAP5

RELAP5 is a computer code, used to simulate transients in light water reactors and was designed primarily for large and small break loss-of-coolant and operational transients. Development emphasized fast running, ease of use, and sufficient accuracy for most calculations. Models used in RELAP5 are briefly described and applications of the code to Semiscale and LOFT experiments are illustrated. Planned research at INEL to use RELAP5 in interactive, real time, and ultimately predictive modes are discussed.