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Dispersion In Confined Environment Experiments

Tests most representative of hydrogen behaviour within enclosures are the following:

• The Russian tests by Shebeko (ShebekoYN:1988): hydrogen distribution experiments for a subsonic release of hydrogen in a closed vessel.
• GEXCON, NH and STATOIL (GexCon:2003) performed hydrogen dispersion experiments in a confined compartmented space.
• CEA has performed slow release helium dispersion tests in their MISTRA facility, Caron-Charles and Blumenfeld (CaronCharlesM:2001), also Blumenfeld and Caron-Charles (BlumenfeldLCEA).
• Tests in the gallery facility of INERIS (LacomeJM:2007)

Aiming at the development and validation of predictive numerical tools for simulating the hydrogen and mixing processes, a valuable knowledge and experimental database has been compiledachieved in the field of nuclear fission safety through an extensive program of tests for hydrogen distribution and mixing within confined geometries, with the aim to develop and validate numerical tools for modelling hydrogen relases and mixing processes. Geometrical conditions are typical of nuclear reactor containments (large and multi-compartment), and test conditions are very nuclear-specific (high contents of steam, no venting). As an example they are worth mentioning the tests performed in the HDR and BMC facilities in Germany or the NUPEC one in Japan (CSNI:1999), as well as those planned or performed at the ThAI (KanzleiterT:2005) and PANDA (AubanO:2007) facilities.

References

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