- PSI used SIMULATE-3 and SIMULATE-3K to predict the neutron noise induced by predefined vibrations of a single fuel assembly or of a cluster of fuel assemblies, with and without additional perturbations of the core inlet coolant flow.
- UPV tested the FEM-based neutronic code that they are developing, over the case of a 1-D simplified nuclear reactor with an oscillating fuel assembly.
- Chalmers prepared a new version of the reactor neutron noise simulator CORE SIM that can treat strongly localized neutron noise sources, and thus fuel assembly vibrations too. The new version of CORE SIM is designed to perform fine-mesh full-core calculations. Small displacements associated to the fuel assembly vibrations can thus be considered with a feasible computational cost.
By Paolo Vinai
Simulated response of an external detector to a prescribed vibration of a fuel assembly in a PWR