Data assimilation in early phase of radiation accident using particle filter

0331546 - ÚTIA 2010 RIV AU eng C - Conference Paper (international conference)
Hofman, Radek - Šmídl, Václav - Pecha, Petr
Data assimilation in early phase of radiation accident using particle filter.
[Asimilace v časné fázi radiační nehody pomocí particle filteru.]
The Fifth WMO International Symposium on Data Assimilation. Melbourne: Australian Government - Bureau of Meteorology, 2009 - (Kepert, J.), s. 1-8
[The Fifth WMO International Symposium on Data Assimilation. Melbourne (AU), 05.10.2009-09.10.2009]
R&D Projects: GA MŠMT(CZ) 1M0572; GA ČR(CZ) GA102/07/1596; GA ČR GP102/08/P250
Institutional research plan: CEZ:AV0Z10750506
Keywords : data assimilation * particle filter * prediction * cloud shine * Gaussian puff * dose rate * reactor accident * decision support
Subject RIV: DL - Nuclear Waste, Radioactive Pollution ; Quality
http://library.utia.cas.cz/separaty/2009/AS/hofman-data assimilation in early phase of radiation accident using particle filter.pdf

Exploitation of the data assimilation methodology in the field of radiation protection is studied. When radioactive pollutants are released into the atmosphere, a radioactive plume is passing over the terrain. In order to ensure efficiency of introduced countermeasures, it is necessary to predict spatial and temporal distribution of the aerial pollution and material already deposited on the ground. The predictions are made by the means of numerical dispersion models with many inputs. A group of the most significant input parameters affecting the dispersion process was selected using available sensitivity and uncertainty studies performed on dispersion models. Exact values of these parameters are uncertain due to the stochastic nature of atmospheric dispersion, hence the parameters are modeled as random quantities. We attempt to estimate these parameters upon measurements using particle filter. The algorithm is tested on an artificial scenario.

Prace se zabyva vyuztim data asimilacnich metod v casne fazi radiacni nehody.
Permanent Link: http://hdl.handle.net/11104/0177037