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[en] One of the working groups dealt with the activity of the committee and in its report it is said that three types for the joint Scandinavian work could be identified: 1. - Projects. 2. - Conferences and training-courses. 3. - Publications and information. Among projects 'Intercalibration' regarding sampling techniques and analytical methods. Transport models, consequences of large accidents, were mentioned and in other groups the same type of projects was given. Another working group dealt with international cooperation in the field of radioecology and in its report it was said that it is important to present the work performed in the Scandinavian countries
[en] At the turn of millennium, several scientists have expressed their thoughts on the future of radioecology and related topics in the Journal of Environmental Radioactivity. These contributions are listed and commented upon. The role of radioecology in the 6th Euratom Framework Programme (2002-2006) is discussed. Previous Nordic radioecology seminars are summarised and trends identified, and suggestions are given for future Nordic activities and developments in the field of environmental radioactivity. (au)
[en] Complete text of publication follows. A major new research infrastructure is being planned to be constructed in Northern Scandinavia. The new EISCAT 3D radar system has a design goal of ten times higher temporal and spatial resolution than the present radars. The modular construction is aimed at a final configuration consisting of several very large phased-array transmitters/ receivers with multiple receiver arrays. Some arrays are very large, up to the scale of 30000 individual antenna elements. The receiver arrays will be located at 50-150 km distance from the illuminators, so that the total system will comprise in the order of 100 000 elements. The volumetric radar imaging capability in an extended spatial area with simultaneous full-vector drift velocities, continuous operation modes, built-in short baseline interferometry capability for imaging sub-beam width scales, real-time data access for applications and extensive data archiving and analysis solutions will provide an unprecedented science and technology application opportunity, well beyond the traditional ground-based ionospheric remote sensing role of the old incoherent scatter radars. EISCAT 3D was accepted on the European Roadmap for Research Infrastructures by the European Strategy Forum on Research Infrastructures in December 2008. The facility will be constructed as a modular concept by year 2015. The first design study of the facility was conducted recently, during 2005-2009 by EISCAT Scientific Association, University of Tromso, Lulea University of Technology, Swedish Institute of Space Physics, Rutherford Appleton Laboratory, and supported by EU FP6 funding. EISCAT Scientific Association operates currently three incoherent scatter radars in Northern Scandinavia on behalf of its associate members in Finland, China, Germany, Japan, Norway, Sweden and United Kingdom, as well as currently supporting partners in France, Russia and Ukraine.
[en] More than 100 delegates forom the Scandinavian countries were gathered for a symposium on September 14-16 1981 at Kungaelv Sweden to discuss nuclear reactor waste. The organisation for the handling of radioactive waste at different countries was presented and the principles of radioactive safety were discussed. The planning of the deposition and storage of waste was described. The proceedings are reproduced on some twenty papers, a number of them written in English. (G.B.)
[en] Planned outages at Asea-Atom boiling water reactors in Scandinavia are remarkably short and efficient by world standards, and their duration is getting shorter. The reasons behind this achievement are examined, and the ingredients of a successful outage are described. (author)
[en] The Board of the Nordic Nuclear Safety Research (NKS) decided in the autumn 2000 to contract out two separate evaluations on the NKS Programme 1998-2001. Martin Oeiby from the NorwegiOe Radiation Protection Authority was requested to perform an evaluation on overall administration of the NKS Programme. Two experts conducted the scientific evaluation. Gustaf Lowenhielm from the Swedish Nuclear Power Inspectorate was requested to assess projects on nuclear safety issues and waste management, and Raimo Mustonen from the Finnish Radiation and Nuclear Safety Authority to evaluate projects on radiation protection and nuclear emergency preparedness. This report deals with the scientific evaluation. The report contains brief review on the history of the Nordic nuclear and radiation safety co-operation and on the development of Programme for 1998-2001. Brief summaries of activities in all the projects are given, together with the main results of the projects. The evaluators give their subjective assessments on the success and effectiveness of the projects based on the evaluation criteria agreed With the NKS Board in the beginning of work. Also some general recommendations for the future co-operation are given. (au)
[en] Complete text of publication follows. Meteor head echoes are radio wave reflections from the dense plasma created by and surrounding a meteoroid on its way through the atmosphere. Using the tristatic EISCAT UHF radar in northern Scandinavia, we have experimentally found that meteor head echo radar targets are virtually independent of aspect angle and confirmed that their Doppler velocity agrees with the target range rate with negligible biases. This demonstrates that no contribution from slipping plasma is detected and that the Doppler velocities are unbiased within the measurement accuracy. One of the long-term questions in meteor physics is how big a role fragmentation plays in the interaction processes of submillimeter-sized meteoroids with the atmosphere. We show that regular pulsations in received power of meteor head echoes observed with the EISCAT radars are a signature of interference from multiple fragments. This study is currently being extended using the Shigaraki MU radar in Japan and simultaneous ICCD video observations. Fragmentation may be taking place on a too small scale for individual fragments to be observable optically, but the effect of fragmentation on the optically observed luminosity can be examined using its signature in the radar data. Statistical studies of fragmentation provide information about meteoroid structural components. These are useful in distinguishing physical differences between various meteoroid populations and contribute to our understanding of the fate of the meteoric material in the atmosphere.