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Abstract
The FIN IX fuel behavior code has been updated to version
0.15.6. The focus of the update has in improving the
usability of the code. The interface and data structures
have been rewritten and input and output file formats
have been defined and added to the code package. The
FINIX code has been designed to provide a fuel behavior
module for other simulation codes in multiphysics
simulations. The intended use is the improvement of fuel
behavior description in neutronics, thermal hydraulics
and reactor dynamics codes, without having to employ
full-scale fuel performance codes. FINIX couples with the
host code on a source code level, and provides an
interface of functions that can be used to access the
fuel behavior model from the host code. At VTT, FINIX has
been integrated into the Monte Carlo reactor physics code
Serpent 2, and reactor dynamics codes TRAB-1 D, TRAB3D
and HEXTRAN. FINIX consists of several interconnected
models that describe the thermo-mechanical behavior of
the fuel rod. FIN IX solves the transient heat equation,
with couplings to the cladding and pellet mechanical
behavior through the gap conductance and pressure.
Publicly available experimental correlations are used for
the material properties, and simple models for the heat
transfer from the cladding to the coolant have been
included. FINIX has been verified against the FRAPTRAN
fuel performance code in RIA scenarios, and compared
against experimental Halden reactor data. Results
indicate good agreement with the FRAPTRAN code and
experimental measurements. Limitations of the present
version in the simulated scenarios have also been
identified. Detailed account of the validation results
are presented in a separate validation report.
Original language | English |
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Publisher | VTT Technical Research Centre of Finland |
Number of pages | 121 |
Publication status | Published - 2015 |
MoE publication type | D4 Published development or research report or study |
Publication series
Series | VTT Research Report |
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Volume | VTT-R-02988-15 |
Keywords
- fuel behaviour modelling
- FINIX
Fingerprint
Dive into the research topics of 'FINIX - Fuel behavior model and interface for multiphysics applications: Code documentation for version 0.15.6'. Together they form a unique fingerprint.Projects
- 1 Finished
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PANCHO - Physics and Chemistry of Nuclear Fuel
Tulkki, V., Loukusa, H., Heikinheimo, J., Peltonen, J., Arkoma, A., Myllykylä, E. & Pohja, R.
1/01/15 → 31/01/18
Project: Other