A FORMAL PROCEDURE FOR OF MODELING UNCERTAINTIES EMPLOYED IN PHENOMENOLOGICAL TRANSIENT MODELS

摘要

Continuous efforts to identify and better under stand the uncertainties have changed many model parameters and physical phenomena employed in the phenomeno- logical transient models or related computer codes to be estimated by more detailed models. Since their true forms are often not known, however, different modeling assump- tions have resulted in various forms of model elements even for a given phenomenon, allowing for different re- sults in the code predictions.