Main Page

Welcome to the Kraken wiki.

Kraken is a reactor analysis computational framework developed at VTT Technical Research Centre of Finland Ltd.

This wiki will document the developed solvers and their coupling and using instructions.

The framework as a whole is still very much under development and functionalities described in this wiki may substantially change from version to version.

Setting up Kraken

1. Setting up the Python environment.
2. Setting up the Python packages.
3. Compiling libFluid.
4. Compiling Ants.
5. Compiling SuperFINIX.
6. Compiling Kharon.
7. Testing for a successful setup.

Codes under development

• Ants nodal neutronics code.
• Cerberus multi-physics driver package.
• Cetus reactor simulator package.
• FINIX fuel behaviour module.
• Kharon porous medium thermal hydraulics code.
• Serpent Monte Carlo particle transport code.
• KrakenTools Python 3 package for pre- and postprocessing purposes.
• SuperFINIX core level fuel behaviour module.
• Not distributed yet as a part of Kraken: TRACEWrap wrapper code which enables Cerberus communication with NRC code TRACE.
• Not distributed yet as a part of Kraken: TUWrap wrapper code which enables Cerberus communication with fuel behaviour code TRANSURANUS.

Distribution and Compiling

• Distribution
• Common build instructions

Tutorials

• Kraken tutorial
• Uncertainty and sensitivity analysis tutorial
• Kraken tutorial 2024

Kraken progression and demonstration problems

• Three by three assembly asymmetric 3D minicore with coolant temperature and density feedback.
• Three by three assembly asymmetric 3D minicore with feedbacks from TH and fuel behavior.
• An SMR scale demonstration case.
• A demonstration of time-dependence with an SMR startup simulation.

Development instructions

• Details of coupling a solver to Cerberus
• Mesh types
• Version control
• SerpentTest collection of test cases for Serpent.