Prediction and Measurement of Three-Dimensional Turbulent Jets Under Suction and Countercurrent Flows in a MAPLE-Type Test Facility

Abstract

Flow patterns in the 1/5-scale hydraulic model of the MAPLE (Multipurpose Applied Physics Lattice Experimental) research reactor were observed experiientallyand were simulated numerically. The study was necessary to ensure that the core jet, which contains short-lived high-level radionuclides, is contained in the open chimney of MAPLE under normal operating conditions. Two selected experiments were simulated using a three-dimensional flow model, MAPL3D, to study the effects of chimney height and core velocity on the flow patterns in the chimney. The numerical results correctly predicted these effects and the unique flow patterns in the chimney.