Abstract
Kraken is a new computational reactor analysis framework under development at VTT Technical Research Center of Finland Ltd. The framework builds heavily on the new generation of Finnish simulation codes such as the Serpent Monte Carlo code, the Ants nodal neutronics solver and the FINIX fuel behavior module. This paper describes the application of Kraken to its first realistic full core problem, a small modular reactor (SMR) core in its fresh state in order to evaluate control rod worths, shutdown margins and reactivity coefficients for the core.
Highlights
The Kraken reactor analysis framework [1] ties together various novel Finnish reactor analysis tools in a modular fashion
Neutronics, thermal-hydraulics and thermal-mechanics solvers are coupled via a central multi-physics driver forming a core analysis tool that can be later coupled to system codes via a separate interface to model transients with power plant level feedbacks
The thermal hydraulics are solved with Kharon, a steady-state closed-channel porous-medium two-phase thermal-hydraulics solver, while the fuel behavior is solved using SuperFINIX
Summary
The Kraken reactor analysis framework [1] ties together various novel Finnish reactor analysis tools in a modular fashion. While one of the main goals of the framework is to leverage Finnish reactor analysis tools and build new source code level expertise through their development, coupling and use, coupling to state-of-theart third-party solvers is supported. In this article we use two different calculation sequences where the neutronics is solved either using the Monte Carlo code Serpent or the nodal neutronics solver Ants. In both cases, the thermal hydraulics are solved with Kharon, a steady-state closed-channel porous-medium two-phase thermal-hydraulics solver, while the fuel behavior is solved using SuperFINIX. A short introduction of the different modules is given
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