Qucosa – Hemholtz-Zentrum Dresden-Rossendorf
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Rapidity dependence of thermal dileptons resulting from hadronizing quark-gluon matter with finite baryon charge
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Institute of Safety Research; Annual Report 1993
Get PDFThe report gives an overview on the scientific work of the Institute of Safety Research in 1993
Analysis of transients for NPP with VVER-440 using the code SiTAP
Get PDFThe report contains results of the analysis of the transients "Loop connection" and "SG tube rupture" for NPP with VVER-440 type reactors. To obtain detailled informations about NPP's dynamic characteristics, various variants of initial and boundary conditions are considered. Calculation of these transients was performed with use of the code SiTAP developed at the Nuclear Safety Institute of Russian Research Centre "Kurchatov Institute". SiTAP is a multi-functional computer tool for fast analysis of transient and accidental processes of VVER type reactors for engineers working in the field of NPP dynamics. SiTAP can be used for comparative analysis of several variants of accident scenarios to find out the conditions leading to the most severe consequences from safety point of view. For this cases, additional analyses using best-estimate codes should be carried out. The results from SiTAP for faulty loop connection leading to a boron dilution accident are intended to be used as boundary conditions for a more detailled analysis by the help of the three-dimensional reactor core model DYN3D, developed in the Research Centre Rossendorf for the simulation of reactivity initiated accidents
Three Contributions to the Seventh International Symposium on Small Particles and Inorganic Clusters
Get PDFA Note on Thermocapillary Instability in the Presence of a Magnetic Field
Get PDFWe formulate the asymptotic theory of thermocapillary instability in a planar fluid layer heated from below in the presence of a strong magnetic field corresponding to high Hartmann number. Explicit asymptotic expressions are derived for the velocity perturbation, temperature perturbation and electric current density. Their spatial structure is characterized in terms of Hartmann boundary layers - a concept which permits a physical understanding of more complicated situations involving surface deformation, buoyancy and thermoelectric effects. The physical nature of large scale instabilities in the case of a deformable surface is clarified
