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Pool Scrubbing system for aerosol removal: focus on bubble characteristics and modeling

pubblicazioni - Poster

Pool Scrubbing system for aerosol removal: focus on bubble characteristics and modeling

Questo metodo viene utilizzato in impianti nucleari come sistema di sicurezza per ridurre la dispersione di aerosol radioattivi per l’ambiente in seguito ad un incidente grave, ma può essere utilizzato anche come un sistema di filtraggio per purificare flussi di gas inquinanti come ad esempio i fumi di combustione creati da caldaie o generatori di vapore alimentati con carbone o biomasse.

The removal of fine and ultrafine toxic particulate from gaseous streams is important in several energyengineering applications. Among the removal mechanisms used, the pool scrubbing allows the removal of particles by bubbling the gas inside a liquid pool (usually water). This method is used in nuclear engineering as a safety system to reduce the dispersion of radioactive aerosols to the environment due to a severe accident, but can be also used as a filtering system to purify polluted gas streams like combustion fumes created by boilers or steam generators fuelled with coal or biomass.

The PASSAM project (Passive and Active Systems on Severe Accident source term Mitigation, 7th framework programme of EC, 2013-2016), has been built to explore potential enhancements of existing source term mitigation devices and check the ability of innovative systems to achieve even larger source term attenuations.

With regards existing devices, RSE is involved in experimental and modeling activity on pool scrubbing dedicated to significant weaknesses on this topic (i.e. lack of systematic analysis of the parameters influencing pool scrubbing, no experimental tracking of variables like bubble size and shape). This work shows the first part of the RSE work dedicated to experimental studies of bubble behaviour, characteristics and modelling.

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