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Título : | Modelling of HTR Confinement Behaviour during Accidents Involving Breach of the Helium Pressure Boundary |
Autor : | Fontanet, Joan Herranz, Luis E. Ramlakan, Alastair Naicker, Lolan |
Palabras clave : | HTR Accident analysis Simulation ASTEC CONTAIN Thermal-hydraulics Aerosols |
Fecha de publicación : | ago-2009 |
Editorial : | Science and Technology of Nuclear Installations |
Citación : | Science and Technology of Nuclear Installations. Volume 2009, Article ID 687634, 11 pages |
Resumen : | Development of HTRs requires the performance of a thorough safety study, which
includes accident analyses. Confinement building performance is a key element of the
system since the behaviour of aerosol and attached fission products within the building
is of an utmost relevance in terms of the potential source term to the environment. This
paper explores the available simulation capabilities (ASTEC and CONTAIN codes) and
illustrates the performance of a postulated HTR vented confinement under prototypical
accident conditions by a scoping study based on two accident sequences characterized
by Helium Pressure Boundary breaches, a small and a large break. The results obtained
indicate that both codes predict very similar thermal-hydraulic responses of the
confinement both in magnitude and timing. As for the aerosol behaviour, both codes
predict that most of the inventory coming into the confinement is eventually depleted on
the walls and only about 1% of the aerosol dust is released to the environment. The
cross-comparison of codes states that largest differences are in the inter-compartmental
flows and the in-compartment gas composition. |
URI : | http://documenta.ciemat.es/handle/123456789/5182 |
ISSN : | 1687-6075 DOI: 10.1155/2009/687634 |
Aparece en las colecciones: | Artículos de Fisión Nuclear
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