Abstract
A porous particle bed consisting of core debris may be
formed as a result of a core melt accident in a nuclear
power plant. The coolability of conical (heap-like) and
cylindrical (evenly-distributed) ex-vessel debris beds
have been investigated in the COOLOCE experiments at VTT.
The experiments have been modeled by using the MEWA
severe accident analysis code. The main objectives of the
modeling were (1) to validate the simulation results
against the experiments by comparing the dryout power
density predicted by the code to the experimental results
and (2) to evaluate the effect of geometry on the
coolability by examining the flow field and the
development of dryout in the two geometries. In addition
to the MEWA simulations, 3D demonstration calculations of
the particle bed dryout process have been performed using
the in-house code PORFLO. It was found that the
simulation and experimental results are in a relatively
good agreement. The results suggest that the coolability
of the conical debris bed is poorer than that of the
cylindrical bed due to the greater height of the conical
configuration
| Original language | English |
|---|---|
| Title of host publication | Proceedings |
| Subtitle of host publication | 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference |
| Place of Publication | New York, NY, USA |
| Publisher | American Society of Mechanical Engineers ASME |
| Pages | 291-300 |
| ISBN (Print) | 978-0-7918-4498-4 |
| Publication status | Published - 2012 |
| MoE publication type | A4 Article in a conference publication |
| Event | 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference - Anaheim, California, United States Duration: 30 Jul 2012 → 3 Aug 2012 |
Conference
| Conference | 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference |
|---|---|
| Country | United States |
| City | Anaheim, California |
| Period | 30/07/12 → 3/08/12 |
Keywords
- Core debris
- coolability
- severe accident
- nuclear power
- MEWA simulations
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Cite this
Takasuo, E., Hovi, V., Ilvonen, M., & Holmström, S. (2012). Modeling of dryout in core debris beds of conical and cylindrical geometries. In Proceedings: 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference (pp. 291-300). American Society of Mechanical Engineers ASME.