Assessment for inside building dispersion of aerosol from an outdoor radiological release
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W. H. Wang
Abstract
Estimation of indoor aerosol concentrations during outdoor release of radioactive materials is important since most people spend a lot of their time indoors. Whereas most of the mass transfer models are too complex to assess the indoor air quality by the first responders or radiation safety officers, this report uses the IAQX code to simulate the airborne concentration and inhalation exposure in a multi-zone building in the event of an outdoor radiological release. The way to establish a multi-zone well-mixed model is introduced first. The contamination in each zone is demonstrated by scenario and case study. Finally, the inhalation exposure will be derived from the air concentration versus time results. The analysis results show the major factors that influence the indoor air quality and health effects from an ambient release and the effectiveness of using IAQX to simulate complex multi-zone mass transfer model.
Kurzfassung
Die Abschätzung von Aerosolkonzentrationen in Gebäuden während der Freisetzung von radioaktiven Stoffen im Freien ist wichtig, da die meisten Leute einen Großteil ihrer Zeit Drinnen verbringen. Während die meisten Massentransfermodelle zu komplex sind, um die Qualität der Luft innerhalb von Gebäuden durch Ersthelfer oder Strahlenschutzbeauftragte zu bestimmen, verwendet dieser Beitrag den IAQX Code zur Simulation der Luftkonzentration und der Exposition durch Inhalation in einem Gebäude mit mehreren Zonen im Falle einer radiologischen Freisetzung im Freien. Ein Modell mit mehreren Zonen und guter Durchmischung der Luft wird erstmals eingeführt. Die Kontamination in jeder einzelnen Zone wird durch entsprechende Szenarien und Fallstudien dargestellt. Schließlich wird die Exposition durch Inhalation aus den Ergebnissen der Luftkonzentration im Zeitverlauf abgeleitet. Die Analyse zeigt die Hauptfaktoren, die die Luftqualität in Gebäuden und die daraus folgenden gesundheitlichen Auswirkungen durch eine Freisetzung in der Gebäudeumgebung beeinflusst sowie die Effektivität des IAQX Codes zur Simulation komplexer Massentransfermodelle mit mehreren Zonen.
References
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© 2009, Carl Hanser Verlag, München
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- Application of the Laplace transform method for the albedo boundary conditions in multigroup neutron diffusion eigenvalue problems in slab geometry
- Modified Chebyshev polynomial (UN) approximation in the neutron transport theory and computation of critical half thicknesses
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- Technical Notes/Technische Mitteilungen
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Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Technical Contributions/Fachbeiträge
- AVR prototype pebble bed reactor: a safety re-evaluation of its operation and consequences for future reactors
- Design Concept of the High Performance Light Water Reactor
- Behavior of CANDU fuel under power pulse conditions at the TRIGA reactor of INR Pitesti
- Plate heat exchanger – inertia flywheel performance in loss of flow transient
- Performance analyses of the communication networks of a modern supervision and control system of research reactors
- Thermal analytical model for MoO3 ampoules irradiated in a high neutron flux
- Effect of using various grades of plutonium in the protective liquid wall of an IFE type fusion reactor
- A discrete ordinates scheme for void fraction evaluation with nonstandard reflective conditions and weakly divergent beams
- Application of the Laplace transform method for the albedo boundary conditions in multigroup neutron diffusion eigenvalue problems in slab geometry
- Modified Chebyshev polynomial (UN) approximation in the neutron transport theory and computation of critical half thicknesses
- Optimizing the dynamic response of the H. B. Robinson nuclear plant using multiobjective particle swarm optimization
- Assessment for inside building dispersion of aerosol from an outdoor radiological release
- Technical Notes/Technische Mitteilungen
- Analysis of a steam generator tube rupture under realistic initial and boundary conditions
