Three dimensional reactor power profile reconstruction using Cerenkov radiation

摘要

The purpose of this study is to extend a method of power profile reconstruction based upon Cerenkov radiation measurements outside of a reactor core to provide information about the 3D power profile. Multiple simulated viewpoints above a coolant channel in a TRIGA reactor are used to estimate the axial tilt in the power density in the surrounding pins. The ability to produce a map of the axial flux tilts throughout the core is demonstrated. The presence of control rods inserted from the top of the core causes a downwards tilt throughout the reactor. Various reactor states are analyzed to demonstrate the ability of the method to provide information about changes in the axial flux tilt by comparing a perturbed state to a baseline. (C) 2020 Elsevier Ltd. All rights reserved.