A Three-Dimensional Modeling Analysis of CANDU 9 End-Shield Cooling Effects with CFX-4: A Preliminary Report

Abstract

End-shield cooling effects in CANDU 9 under both normal and accidental conditions have been analyzed, using a commercial three-dimensional code, CFX-4. The simulated three-dimensional heat transfer agrees with the design specifications for normal operation conditions. In the event of loss of forced flow, the code predicts a maximum temperature of 96 degrees C on the fueling tubesheet, which is far below the coolant boiling point of 143 degrees C. The detailed temperature distribution in the end shield. simulated with the code, can be used as input for stress analysis.