A simple mechanistic model for particle penetration and plugging in tubes and cracks

Mitrakos, D.; Chatzidakis, Stylianos; Hinis, E.P.; Herranz, L.E.; Parozzi, F.; Housiadas, C.

doi:10.1016/j.nucengdes.2008.07.002

Cited by 19 publications

(8 citation statements)

References 15 publications

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“…In particular, an Eulerian model has been developed to calculate deposition through cracks, as well as plug formation [148]. In particular, an Eulerian model has been developed to calculate deposition through cracks, as well as plug formation [148].…”

Section: Aerosol Leaks Through Cracksmentioning

confidence: 99%

Fission Product Release and Transport

2012

Nuclear Safety in Light Water Reactors

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Containmentby-pass FIGURE 5.1 Schematic representation of the source term pathway.2. Equations are similar for variations in HN and AP inventories without an expression for production by fission. 428Nuclear Safety in Light Water Reactors: Severe Accident Phenomenology l The potential formation of UO 2 -FP eutectics 3 tends to lower the melting temperature [5], with the FP concentration in the fuel being significant at high burn-ups (higher than 10 atomic % above 50 GWd/t);3. ZrO 2 from cladding oxidation can also play a role in reducing the melting temperature of the corium mixture, as also discussed in [5].

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Section: Aerosol Leaks Through Cracksmentioning

confidence: 99%

Fission Product Release and Transport

2012

Nuclear Safety in Light Water Reactors

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“…Here, we will focus on a recent example of modelling described in Refs. [14,15]. However, the cracks are represented by straight-sided channels, and turbulent deposition mechanisms are used there to model inertial deposition in an effort to match the filtering measurements of Gelain and Vendel [5], as interpreted by those authors.…”

Section: Other Theoretical Modellingmentioning

confidence: 99%

“…The strategy employed was therefore to use Eq. (15) to determine the time evolution of the pressure differential, while the instantaneous aerosol mass flow rate to the environment was determined by the CCFE model as a function of the pressure.…”

Section: Specification Of Bounding Accident Scenariomentioning

confidence: 99%

Theoretical modelling of gas flow and filtering of particulates in cracks in containment barriers, and comparison with other theoretical and empirical studies

Han

2012

Fusion Engineering and Design

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“…Furthermore, the penetration of aerosol particles into naturally ventilated rooms takes place through open windows, designated passages in the building shell, or even cracks or leakages in the building shell. Such conditions make the description of the penetration factor very difficult 14 , 18 – 21. In general, the penetration factor depends on many variables including airflow characteristics, physical properties and geometry of air passage, and also particle size.…”

Section: Introductionmentioning

confidence: 99%

“…Such conditions make the description of the penetration factor very difficult. 14,[18][19][20][21] In general, the penetration factor depends on many variables including airflow characteristics, physical properties and geometry of air passage, and also particle size.…”

Section: Introductionmentioning

confidence: 99%

Migration of aerosol particles inside a two-zone apartment with natural ventilation: A multi-zone validation of the multi-compartment and size-resolved indoor aerosol model

Mølgaard

Ondráček

́ávová³

et al. 2013

Indoor and Built Environment

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Since decades, indoor aerosol models have been introduced to understand the behaviour of indoor aerosols. However, studies about model validation in multi-zone form are very rare because of the lack of high quality and well-controlled measurements. We utilized state-of-the-art measurement and modelling approaches to validate the Multi-Compartment and Size-resolved Indoor Aerosol Model (MC-SIAM) inside a two-zone apartment with natural ventilation. According to the MC-SIAM simulations, the ventilation rates ranged from 0.06 to 0.31 h–1 during closed windows and it was as high as 2.1 h–1 when a window was open; compared to the tracer gases analysis results, the ventilation rate was as high as 0.26 h–1 (closed windows) and 1.7 h–1 (open window). The internal airflow predicted with the MC-SIAM ranged from 9.3 to 11 m–3 h (tracer gas analysis 7.6–15 m–3 h) when the door between the internal rooms was opened. The methods utilized in this study have proven that indoor aerosol models such as the MC-SIAM are valid to describe the behaviour of indoor aerosol particles inside multi-zone dwellings with the assumption of well-mixed indoor air inside each zone. The next step in indoor aerosol models development should include re-suspension and new particle formation processes.

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A simple mechanistic model for particle penetration and plugging in tubes and cracks

Cited by 19 publications

References 15 publications

Fission Product Release and Transport

Fission Product Release and Transport

Theoretical modelling of gas flow and filtering of particulates in cracks in containment barriers, and comparison with other theoretical and empirical studies

Migration of aerosol particles inside a two-zone apartment with natural ventilation: A multi-zone validation of the multi-compartment and size-resolved indoor aerosol model

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