THAI test facility for experimental research on hydrogen and fission product behaviour in light water reactor containments
| Autor: | E. Schmidt, Sanjeev Gupta, Gunter Weber, M. Freitag, F. Funke, G. Poss, B. von Laufenberg |
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| Rok vydání: | 2015 |
| Předmět: |
Nuclear and High Energy Physics
Fission products Nuclear fission product Waste management Hydrogen Mechanical Engineering Nuclear engineering chemistry.chemical_element Iodine oxide Combustion Thermal hydraulics chemistry.chemical_compound Nuclear Energy and Engineering Containment chemistry Environmental science General Materials Science Light-water reactor Safety Risk Reliability and Quality Waste Management and Disposal |
| Zdroj: | Nuclear Engineering and Design. 294:183-201 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/j.nucengdes.2015.09.013 |
| Popis: | The test facility THAI (thermal-hydraulics, hydrogen, aerosol, and iodine) aims at addressing open questions concerning gas distribution, behaviour of hydrogen, iodine and aerosols in the containment of light water reactors during severe accidents. Main component of the facility is a 60 m 3 stainless steel vessel, 9.2 m high and 3.2 m in diameter, with exchangeable internals for multi-compartment investigations. The maximal design pressure of the vessel is 14 bar which allows H 2 combustion experiments at a severe accident relevant H 2 concentration level. The facility is approved for the use of low-level radiotracer I-123 which enables the measurement of time resolved iodine behaviour. The THAI test facility allows investigating various accident scenarios, ranging from turbulent free convection to stagnant stratified containment atmospheres and can be combined with simultaneous use of hydrogen, iodine and aerosol issues. THAI experimental research also covers investigations related to mitigation systems employed in light water reactor containments by performing experiments on, e.g. pressure suppression pool hydrodynamics, performance behaviour of passive autocatalytic recombiners, and spray interaction with hydrogen–steam–air flames in phenomenon orientated and coupled-effects experiments. The THAI experimental data have been widely used for the validation and further development of Lumped Parameter and Computational Fluid Dynamics codes with 3D capabilities, e.g. International Standard Problems ISP-47 (thermal hydraulics, gas distribution) and ISP-49 (hydrogen combustion), EU-SARNET/SARNET2 code-benchmark exercises involving THAI data on iodine/surface interactions, iodine mass transfer, passive autocatalytic recombiner performance, iodine oxide behaviour and iodine transport in multi-compartment behaviour. The present paper provides an overview of the THAI experiments related to hydrogen and fission products issues performed in the frame of national and international projects. From the comprehensive THAI experimental database, a selection of typical results is presented to illustrate the multi-functionality of the THAI facility and the broad variety of the experimental investigations. |
| Databáze: | OpenAIRE |
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