D. Trybushnyi
Karlsruhe Institute of Technology
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Publication
Featured researches published by D. Trybushnyi.
Journal of Hazardous Materials | 2017
Xiaole Zhang; Wolfgang Raskob; Claudia Landman; D. Trybushnyi; Yu Li
In case of a nuclear accident, the source term is typically not known but extremely important for the assessment of the consequences to the affected population. Therefore the assessment of the potential source term is of uppermost importance for emergency response. A fully sequential method, derived from a regularized weighted least square problem, is proposed to reconstruct the emission and composition of a multiple-nuclide release using gamma dose rate measurement. The a priori nuclide ratios are incorporated into the background error covariance (BEC) matrix, which is dynamically augmented and sequentially updated. The negative estimations in the mathematical algorithm are suppressed by utilizing artificial zero-observations (with large uncertainties) to simultaneously update the state vector and BEC. The method is evaluated by twin experiments based on the JRodos system. The results indicate that the new method successfully reconstructs the emission and its uncertainties. Accurate a priori ratio accelerates the analysis process, which obtains satisfactory results with only limited number of measurements, otherwise it needs more measurements to generate reasonable estimations. The suppression of negative estimation effectively improves the performance, especially for the situation with poor a priori information, where it is more prone to the generation of negative values.
international conference on advancements in nuclear instrumentation measurement methods and their applications | 2013
Vincent Schoepff; Istvan Alamsi; Khalil Amgarou; Frank Becker; Frédérick Carrel; Federico Carvajal; David Gaboriau; Mehdi Gmar; Andras Kovacs; Hermine Lemaire; Nabil Menaa; Luc Morat; Ciaran G. Morrison; Israel Perez-llopis; Wolfgang Raskob; Sandor Szabo; Éva Széles; Isabelle Testard; D. Trybushnyi; Nicolas Ugolin; Muriel Viau; Arpad Vincze
The effective management of an event involving the exposure of a large number of people to radioactive material requires a mechanism for fast triage of exposed people. BOOSTER is a project founded by the European Union under the Seventh Framework Programme, addressing this requirement. It is a capability project designed to provide an integrated system which could easily be deployed and used. For this purpose, the BOOSTER consortium, relying on the expertise of seven members, researches and develops new approaches to allow an effective and fast management of most kind of nuclear threats. BOOSTER System was designed to help first responders mitigating the crisis by providing the necessary information to quickly assess the radiological situation, to support triage staff in performing an efficient and fast categorization of the potentially affected victims, and to give medical staff crucial information for further treatment at medium or long term post-accident.
International Journal of Environment and Pollution | 2014
Ivan V. Kovalets; Lennart Robertson; Christer Persson; Svitlana N. Didkivska; Ievgen A. Ievdin; D. Trybushnyi
The paper presents estimates of the far-range atmospheric dispersion of radionuclides after the accident at Fukushima Daiichi Nuclear Power Plant (NPP), obtained using the long-range atmospheric dispersion model MATCH. Software tools were developed to run MATCH in the EU nuclear emergency response system JRODOS using freely available numerical weather prediction (NWP) data of the Global Forecasting System (GFS) operated by the United States National Center of Environmental Prediction (NCEP). Comparisons are made of results with JRODOS/MATCH and a standalone MATCH operated by Swedish Meteorological and Hydrological Institute (SMHI) driven by the European Center for Medium-Range Weather Forecasts (ECMWF) NWP data.
Radioprotection | 2011
Wolfgang Raskob; D. Trybushnyi; I. Ievdin; M. Zheleznyak
Radioprotection | 2010
M. Zheleznyak; S. Potempski; R. Bezhenar; A. Boyko; I. Ievdin; A. Kadlubowski; D. Trybushnyi
International Journal of Energy for a Clean Environment | 2012
Ievgen O. Ievdin; Oleksandr V. Khalchenkov; Ivan V. Kovalets; Wolfgang Raskob; D. Trybushnyi; M. Zheleznyak
Radioprotection | 2013
Claudia Landman; J. Päsler-Sauer; Wolfgang Raskob; D. Trybushnyi
Journal of Environmental Radioactivity | 2017
Xiaole Zhang; Wolfgang Raskob; Claudia Landman; D. Trybushnyi; Christoph Haller; Hongyong Yuan
Radioprotection | 2016
Claudia Landman; Wolfgang Raskob; D. Trybushnyi; I. Ievdin
Radioprotection | 2016
T. Charnock; Claudia Landman; D. Trybushnyi; I. Ievdin