Cardinal

High-Fidelity Multiphysics

From neams-th-coe·Updated June 14, 2026·View on GitHub·

Cardinal accelerates scientific discovery in fusion and fission energy systems using high-fidelity multiscale and multiphysics simulation. Cardinal wraps the spectral element code CFD [NekRS](https://github.com/Nek5000/nekRS) and the Monte Carlo radiation transport code [OpenMC](https://github.com/openmc-dev/openmc) within the MOOSE framework, enabling large-scale, first-of-a-kind simulation of energy systems. The project is written primarily in SWIG, distributed under the Other license, first published in 2021.

Cardinal accelerates scientific discovery in fusion and fission energy systems
using high-fidelity multiscale and multiphysics simulation. Cardinal wraps
the spectral element code CFD NekRS and
the Monte Carlo radiation transport code OpenMC within
the MOOSE framework, enabling large-scale, first-of-a-kind simulation of energy systems.

Please visit our documentation website, where you
will find: