Conference Publications
This community mainly contains citations, yet where permitted, the full text, of the conference papers, presentations, posters and abstracts written by ANSTO authors.
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Browsing Conference Publications by Subject "Accidents"
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- ItemEvaluation of dispersion models DIPCOT and RIMPUFF used in Decision Support Systems for nuclear and radiological emergency response(HARMO, 2010-06-01) Andronopoulos, S; Dyer, LL; Davakis, E; Bartzis, JGThis paper presents evaluation of the atmospheric dispersion models DIPCOT and RIMPUFF which are incorporated for operational use in Decision Support Systems for nuclear emergencies. The evaluation is performed through comparisons of model results with real-scale measurements of gamma radiation dose rates in air obtained during the routine operation of the HIFAR Research Reactor located in Sydney, Australia. The area surrounding the reactor is characterized by moderately complicated topography and varying land cover. A total of 16 days have been computationally simulated, covering all atmospheric stability conditions. Qualitative and quantitative model evaluation is carried out, using comparisons of paired in space and time calculated and measured gamma dose rates, statistical indices, scatter plots, and contour plots. The models performance is satisfactory for a number of cases, while for others the performance is poor. This can be attributed to a number of factors, mainly uncertainties in the prediction of meteorological conditions.
- ItemModel evaluation of RIMPUFF within complex terrain using an Ar-41 radiological dataset(Inderscience Enterprises Ltd., 2012-01-01) Dyer, LL; Astrup, PThe newly updated atmospheric dispersion model RIMPUFF is evaluated using routine releases of Ar-41 from the former HIFAR research reactor located in Sydney, Australia. A large number of Ar-41 measurements from a network of environmental gamma detectors are used to evaluate the model under a range of atmospheric stability conditions within the complex terrain area. Model sensitivity of input data is analysed including meteorological station data, land use maps, surface roughness and wind interpolation schemes. Various model evaluation tools are used such as gamma dose rate plots, exploratory data analyses and relevant statistical performance measures. © 2012, Inderscience Enterprises Ltd.
- ItemModel evaluation of RIMPUFF within complex terrain using an Ar-41 radiological dataset(HARMO, 2010-06-01) Dyer, LL; Astrup, PThe newly updated atmospheric dispersion model RIMPUFF is evaluated using routine releases of 41Ar from the former HIFAR research reactor located at the Australian Nuclear Science and Technology Organisation (ANSTO) in Sydney, Australia. Predicting radiological dispersion for emergency response at this site proves challenging due to complex topographical conditions including a steep-sided river valley located between the reactor and the nearest residents. A large number of 41Ar measurements from a network of environmental gamma detectors are used to evaluate the model under a range of atmospheric stability conditions. Topographic and meteorological influences that potentially affect a released plume, such as channelling, wind shear, local terrain slope flows and strong inversions are explored. A sensitivity analysis using various combinations of meteorological station data for model input, including vertical wind and temperature profiles, also identifies model strengths and weaknesses within the complex terrain. Various model evaluation tools, such as relevant statistical indices and gamma dose contour plots, are used to evaluate this new version of RIMPUFF for emergency response purposes at ANSTO and for inclusion in the ARGOS Decision Support System.
- ItemReturn of the Sea Monster – a tale from D’Urville Island, New Zealand(International Union for Quaternary Research, 2012-09-04) Chagué-Goff, C; Cope, J; McFadgen, BG; Mooney, SD; Kilroy, C; Zawadzki, A; Wong, HKY; Jacobsen, GENot available.