Simulation of Steady-State and Transient Sodium Boiling Experiments in a Seven-Pin Bundle under Flow Rundown Conditions by Using BODYFIT-1FE Code

摘要

A seven-pin rod bundle under flow rundown conditions was simulated by using the computer code BODYFIT-1FE (Boundary-Fitted Coordinate System - 1 phase, Fully-Elliptic). In this code, the complicated rod bundle configuration is first transformed into rectangular geometry with uniform meshes. The transformed governing equations for all the thermal-hydraulic variables are then solved. The results of the simulation are presented here. All the predicted values agree favorably with the measured data.