Modifications for the Development of the MAAP-DOE Code: Volume 1, A Mechanistic Model for Core-Concrete Interactions and Fission Product Release in Integrated Accident Analysis Task 3.4.3

摘要

A core-concrete interaction model has been developed for the ARSAP program which is suitable for anticipated advanced light water reactor needs. The new molten debris-concrete attack model allows for unequal sideward and downward erosion rates. Heat transfer rates are independently calculated in each direction, and conduction into the concrete also occurs independently in each direction. Debris properties are more accurately represented by using data for each compound. Debris solidification calculations are based on phase diagrams which allow single- or two-phase debris surrounded by a crust. The new model was exercised for selected tests from three series of experiments. The model predictions for concrete erosion, fission product release and debris temperature compared well with experimental results. 18 refs., 49 figs., 13 tabs. (ERA citation 14:026546)