In this case study the endless possibilities within Flownex® are highlighted by the application of user coding and the versatility it adds to the tool. In a pneumatic conveying system, the interaction between the gas and the particles being conveyed is very important for control and performance prediction. This is also the case for the Fuel Handling System of the Pebble Bed Modular Reactor where the fuel (in the form of 60mm graphite spheres) is pneumatically conveyed with Helium (±11m vertically). The Helium accelerates the pebbles in the feed line and then pneumatically brakes the pebbles before they are deposited back into the bed or storage container. The challenge is to model/predict the sphere kinematics, and to determine the interaction of the sphere on the flow velocities/distribution in the system.

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