Download or read book Evaluation of Atmospheric Dispersion Models Applied to the Release from Chernobyl written by and published by . This book was released on 1989 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of atmospheric dispersion models applied to the release from Chernobyl written by Peter Steinhauser and published by . This book was released on 1989 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Atmospheric Dispersion Models Applied to the Release from Chernobyl written by and published by . This book was released on 1989 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Long Range Atmospheric Transport Models Using Environmental Radioactivity Data from the Chernobyl Accident written by W. Klug and published by Springer. This book was released on 1992-06-30 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: A group of experts developed the outline for the Atmospheric Transport Model Evaluation Study and specified the requirements of modellers for radiological and meterological data. The results of the study are presented in this book.
Download or read book Air Pollution Modeling and Its Application VII written by Han Van Dop and published by Springer. This book was released on 1989 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air pollution remains a major environmental issue despite many years of study and much legislative control. In rec~nt times, pollution on a global scale has become of particular concern. The gradually changing con centration of trace gases in the global troposphere due to man's activity is becomming a matter of serious concern. No scientist would dare to pre dict in detail the consequences of this gradual change due to its immense complexity involving social and economic factors and near countless chemical and phjsical cycles in our biosphere. In this chain of processes, the transport of pollution is an important factor, but only a factor. Therefore, I would like to emphasize that the mOdelling of atmospheric transport is becoming more and more an activity which fits into larger frameworks and can no longer be exercised as a single step, which bridges the gap between emissions and policy measures. This is also reflected in the topics and papers which were presented at this conference. The topics were: - emission invetories for and source treatment in air pollution dispersion models; - modelling of accidental releases; - regional and global scale dispersion mOdelling; including boundary layer-free troposphere exchange processes and subgrid scale parameter isations; - model verification and policy implications; - new developments in dispersion modelling and theory. 56 papers were presented in these sections. While many posters were dis cussed in a special session.
Download or read book Modelling Radioactivity in the Environment written by E.M. Scott and published by Elsevier. This book was released on 2003-05-22 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: Just as an environmental model typically will be composed of a number of linked sub-models, representing physical, chemical or biological processes understood to varying degrees, this volume includes a series of linked chapters exemplifying the fundamental nature of environmental radioactivity models in all compartments of the environment. Why is a book on modelling environmental radioactivity necessary? There are many reasons why such a boook is necessary, perhaps the most important that: - modelling is an often misunderstood and maligned activity and this book can provide, to a broad audience, a greater understanding of modelling power but also some of the limitations. - modellers and experimentalists often do not understand and mistrust each other's work yet they are mutually dependent, in the sense that good experimental science can direct good modelling work and vice-versa; we hope that this book can dispel mistrust and engender improved understanding. - there is an increasing reliance on model results in environmental management, yet there is also often misuse and misrepresentation of these results. This book can help to bridge the gap between unrealistic expectations of model power and the realisation of what is possible, practicable and feasible in modelling of environmental radioactivity; and finally, - modelling tools, capacity and power have increased many-fold in a relatively short period of time. Much of this is due to the much-heralded computer revolution, but much is also due to better science. It is useful to consider what gap if any still remains between what is possible and what is necessary.
Download or read book Evaluation and Development of Data Assimilation in Atmospheric Dispersion Models for Use in Nuclear Emergencies written by Dongqin Zheng and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Evaluation and Development of Data Assimilation in Atmospheric Dispersion Models for Use in Nuclear Emergencies" by Dongqin, Zheng, 鄭冬琴, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled EVALUATION AND DEVELOPMENT OF DATA ASSIMILATION IN ATMOSPHERIC DISPERSION MODELS FOR USE IN NUCLEAR EMERGENCIES Submitted by Zheng Dongqin for the degree of Doctor of Philosophy at The University of Hong Kong in August 2007 When radioactive contaminants are released into the atmosphere during a nuclear accident, the consequence assessment that relies on atmospheric dispersion models plays an important role for the decision-makers in taking the correct response. In this thesis, a 3D Monte Carlo Dispersion Model (MCDM) was developed and evaluated. Data assimilation technique was in- corporated to give a real time consequence assessment in the unlikely event of a nuclear accident of the nuclear power plant (NPP) in the Daya Bay. The predictions of MCDM were compared with that of the Particle Dis- persion Model (PDM) developed by the Hong Kong Observatory. The dif- ferences in air concentrations and ground depositions predicted by the two models were found to be within one order of magnitude. MCDM predictions were also tested against the measurements of a eld dispersion of radioactivematerials from a research reactor in Mol, Belgium. Both the gamma uence rates and the plume geometry given by MCDM are comparable with the measurement results. Although the dispersion model can execute well given a known source term, meteorological data and dispersion parameters, uncertainties of these model parameters may inuence the reliability of model predictions. The ability of a model in assimilating measurement data is crucial to improve model predictions. In this thesis, a data assimilation method based on the Ensemble Kalman Filter (EnKF) and a stochastic nonlinear state space model was proposed. It presents a new method for online update of the model predictions and estimation of the model parameters, i.e. the release rate, wind direction, or turbulence intensity, by adding the measurement in- formation. The proposed method has been tested by twin experiments in which simulated ground level dose rates have been assimilated. The predic- tion errors caused false' estimations of model parameters could be reduced by more than 60%. The temporal variations of model parameters estimated by EnKF were found to follow the true' value very well. In order to test the data assimilation method with real experimental data, a wind tunnel dispersion experiment was carried out for the east and south-east wind directions over the area surrounding the Daya Bay NPP. The measurement data collected were assimilated in the dispersion model. Amethodwaspresentedbyusingrandomeldstoconstructtheerrorsin3D parameters, e.g. the wind direction and turbulence intensity. This method is very helpful in ensuring the performance of the EnKF. The data assimilation method was also tested against the Mol experi- mental data. The gamma uence rates overestimated by the MCDM were corrected by EnKF. The temporal variations of model parameters estimated by EnKF have been shown to provide useful information for tracking the major error sources. DOI: 10.5353/th_b3934603 Subjects: Radioactive fallout Particle size determination Monte Carlo method
Download or read book Meteorological Aspects of Emergency Response written by American Meteorological Society and published by . This book was released on 1990 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Review of Atmospheric Diffusion Models for Regulatory Applications written by S. R. Hanna and published by . This book was released on 1982 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tracking and Predicting the Atmospheric Dispersion of Hazardous Material Releases written by National Research Council and published by National Academies Press. This book was released on 2003-07-18 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: For many years, communities have prepared themselves to deal with accidental atmospheric releases from industrial sites, energy facilities, and vehicles transporting hazardous materials. Today, these communities must also worry about the terrorist threat of the intentional use of chemical, biological, and nuclear (C/B/N) agents. Because of this threat, the ability to predict and track the dispersal of harmful agents has become a critical element of terrorism planning and response. Our nation�s capacity to respond to atmospheric C/B/N events stands, like a three legged stool, on the strength of three interconnected elements: 1) dispersion models that predict the path and spread of the hazardous agent; 2) observations of the hazardous plume itself and of local meteorological conditions, which provide critical input for the models; and 3) interaction with emergency responders who use the information provided by the models. As part of the National Academies continuing focus on issues of homeland security, Tracking and Predicting the Atmospheric Dispersion of Hazardous Material Releases examines our nation�s current capabilities in these three areas and provides recommendations for strengthening them.
Download or read book Recent Advances in Reactor Accident Consequence Assessment written by and published by . This book was released on 1988 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Evaluation of a Simple Second Order Closure Atmospheric Dispersion Model for an Elevated Passive Release written by Sandeep Sahore and published by . This book was released on 1997 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation and Development of Data Assimilation in Atmospheric Dispersion Models for Use in Nuclear Emergencies written by Dongqin Zheng and published by . This book was released on 2007 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atmospheric Dispersion Modelling written by Rod Barratt and published by Routledge. This book was released on 2013-11-05 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: To comply with legal and other standards, businesses and regulators are increasingly required to make decisions based on risk assessments of the potential effects of their activities on the environment. Atmospheric dispersion modelling is a cost-effective method, allowing various scenarios to be explored before expensive investment takes place. This guide offers advice on this environmental management tool. Unlike much of the previous literature, it doesn't focus excessively on the mathematical theory behind the modelling or on modelling for specific regulatory purposes. Instead, it offers an understanding of the background to the methodologies, providing exercises to develop the skills to carry these out and including examples of the use of commercially available models to enable the reader to assess the results of modelling for risk assessment.
Download or read book Air Pollution Modeling written by P. Zannetti and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finishing this book is giving me a mixture of relief, satisfaction and frus tration. Relief, for the completion of a project that has taken too many of my evenings and weekends and that, in the last several months, has become almost an obsession. Satisfaction, for the optimistic feeling that this book, in spite of its many shortcomings and imbalances, will be of some help to the air pollution scientific community. Frustration, for the impossibility of incorporating newly available material that would require another major review of several key chap ters - an effort that is currently beyond my energies but not beyond my desires. The first canovaccio of this book came out in 1980 when I was invited by Computational Mechanics in the United Kingdom to give my first Air Pollution Modeling course. The course material, in the form of transparencies, expanded, year after year, thus providing a growing working basis. In 1985, the ECC Joint Research Center in Ispra, Italy, asked me to prepare a critical survey of mathe matical models of atmospheric pollution, transport and deposition. This support gave me the opportunity to prepare a sort of "first draft" of the book, which I expanded in the following years.
Download or read book Environmental Consequences of the Chernobyl Accident and Their Remediation written by International Atomic Energy Agency and published by IAEA. This book was released on 2006 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: The explosion on 26 April 1986 at the Chernobyl nuclear power plant and the consequent reactor fire resulted in an unprecedented release of radioactive material from a nuclear reactor and adverse consequences for the public and the environment. Although the accident occurred nearly two decades ago, controversy still surrounds the real impact of the disaster. Therefore the IAEA, in cooperation with other UN bodies, the World Bank, as well as the competent authorities of Belarus, the Russian Federation and Ukraine, established the Chernobyl Forum in 2003. The mission of the Forum was to generate 'authoritative consensual statements' on the environmental consequences and health effects attributable to radiation exposure arising from the accident as well as to provide advice on environmental remediation and special health care programmes, and to suggest areas in which further research is required. This report presents the findings and recommendations of the Chernobyl Forum concerning the environmental effects of the Chernobyl accident.
