GOTHIC Verification on Behalf of the Heiss Dampf Reaktor Hydrogen-Mixing Experiments

GOTHIC is an advanced code for thermal-hydraulic flow simulation in nuclear reactor containments and other confinements. Battelle Europe has participated in the development and verification of the code over a number of years. Described are blind and open posttest calculations of the Heiss Dampf Reak...

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Bibliographic Details
Published in:Nuclear technology 1999-02, Vol.125 (2), p.166-181
Main Authors: Holzbauer, Helmut, Wolf, Lothar
Format: Article
Language:English
Subjects:
Accident prevention
Computational fluid dynamics
Computer aided analysis
Computer simulation
Computer software selection and evaluation
Cooling
Flow of fluids
Hydraulics
Hydrogen
Mixing
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Summary:GOTHIC is an advanced code for thermal-hydraulic flow simulation in nuclear reactor containments and other confinements. Battelle Europe has participated in the development and verification of the code over a number of years. Described are blind and open posttest calculations of the Heiss Dampf Reaktor hydrogen-mixing experiments E11.2 and E11.4 in comparison with measured data. Caused by a miscalibration of steam source flow rates and neglect of the heat sink capability of the instrumentation cooling lines, the pressure, temperature, and steam concentrations were drastically overpredicted by the blind predictions and are quantitatively not comparable to experimental data. The following conclusions can be drawn from the parametric open posttest calculations: 1. Scenarios with homogeneous containment atmosphere (like E11.4) can be simulated accurately with lumped-parameter models. 2. The lumped-parameter method is seemingly not fully qualified to predict the hydrogen distribution in a stratified containment atmosphere (like E11.2). 3. Improved predictive quality may require the application of distributed parameter models.
ISSN:0029-5450
1943-7471
DOI:10.13182/NT99-A2940