The possibility of using intermediate working bodies to reduce the power consumption of own needs of nuclear power plants with VVER-1200

The analysis of electricity consumers of own needs of NPP with VVER 1200. It is shown that the greatest power consumption characteristic of main technological pumps-the main circulation, nourishing, condensate, circulation, network. The possibility of applying for pumps 2-nd contour drive steam turbine low pressure. Defined scope of underproducing of energy on NPP due to increased steam selection systems drives.Проведен анализ электропотребителей собственных нужд АЭС с реактором ВВЭР 1200. Показано, что наибольшее энергопотребление характерно для основных технологических насосов – главного циркуляционного, питательного, конденсатного, циркуляционного, сетевого. Рассмотрена возможность применения для насосов 2-го контура АЭС паротурбинного привода низкого давления. Определены масштабы недовыработки энергии АЭС вследствие увеличения отбора пара на турбоагрегаты приводов

ROOT - A C++ Framework for Petabyte Data Storage, Statistical Analysis and Visualization

ROOT is an object-oriented C++ framework conceived in the high-energy physics (HEP) community, designed for storing and analyzing petabytes of data in an efficient way. Any instance of a C++ class can be stored into a ROOT file in a machine-independent compressed binary format. In ROOT the TTree object container is optimized for statistical data analysis over very large data sets by using vertical data storage techniques. These containers can span a large number of files on local disks, the web, or a number of different shared file systems. In order to analyze this data, the user can chose out of a wide set of mathematical and statistical functions, including linear algebra classes, numerical algorithms such as integration and minimization, and various methods for performing regression analysis (fitting). In particular, ROOT offers packages for complex data modeling and fitting, as well as multivariate classification based on machine learning techniques. A central piece in these analysis tools are the histogram classes which provide binning of one- and multi-dimensional data. Results can be saved in high-quality graphical formats like Postscript and PDF or in bitmap formats like JPG or GIF. The result can also be stored into ROOT macros that allow a full recreation and rework of the graphics. Users typically create their analysis macros step by step, making use of the interactive C++ interpreter CINT, while running over small data samples. Once the development is finished, they can run these macros at full compiled speed over large data sets, using on-the-fly compilation, or by creating a stand-alone batch program. Finally, if processing farms are available, the user can reduce the execution time of intrinsically parallel tasks - e.g. data mining in HEP - by using PROOF, which will take care of optimally distributing the work over the available resources in a transparent way

Energy loss of pions and electrons of 1 to 6 GeV/c in drift chambers operated with Xe,CO2(15%)

We present measurements of the energy loss of pions and electrons in drift chambers operated with a Xe,CO2(15%) mixture. The measurements are carried out for particle momenta from 1 to 6 GeV/c using prototype drift chambers for the ALICE TRD. Microscopic calculations are performed using input parameters calculated with GEANT3. These calculations reproduce well the measured average and most probable values for pions, but a higher Fermi plateau is required in order to reproduce our electron data. The widths of the measured distributions are smaller for data compared to the calculations. The electron/pion identification performance using the energy loss is also presented.Comment: 15 pages, 10 figures, accepted for publication in Nucl.Instrum.Meth.

High Precision Mass Measurements in Ψ\Psi and Υ\Upsilon Families Revisited

High precision mass measurements in $\Psi$ and $\Upsilon$ families performed in 1980-1984 at the VEPP-4 collider with OLYA and MD-1 detectors are revisited. The corrections for the new value of the electron mass are presented. The effect of the updated radiative corrections has been calculated for the $J/\Psi(1S)$ and $\Psi(2S)$ mass measurements.Comment: 5 pages, 1 table, submitted to Phys. Lett.

The possibility of using intermediate working bodies to reduce the power consumption of own needs of nuclear power plants with VVER-1200

The analysis of electricity consumers of own needs of NPP with VVER 1200. It is shown that the greatest power consumption characteristic of main technological pumps-the main circulation, nourishing, condensate, circulation, network. The possibility of applying for pumps 2-nd contour drive steam turbine low pressure. Defined scope of underproducing of energy on NPP due to increased steam selection systems drives.Проведен анализ электропотребителей собственных нужд АЭС с реактором ВВЭР 1200. Показано, что наибольшее энергопотребление характерно для основных технологических насосов – главного циркуляционного, питательного, конденсатного, циркуляционного, сетевого. Рассмотрена возможность применения для насосов 2-го контура АЭС паротурбинного привода низкого давления. Определены масштабы недовыработки энергии АЭС вследствие увеличения отбора пара на турбоагрегаты приводов

Search for narrow resonances in e+ e- annihilation between 1.85 and 3.1 GeV with the KEDR Detector

We report results of a search for narrow resonances in e+ e- annihilation at center-of-mass energies between 1.85 and 3.1 GeV performed with the KEDR detector at the VEPP-4M e+ e- collider. The upper limit on the leptonic width of a narrow resonance Gamma(R -> ee) Br(R -> hadr) < 120 eV has been obtained (at 90 % C.L.)

New precise determination of the \tau lepton mass at KEDR detector

The status of the experiment on the precise $\tau$ lepton mass measurement running at the VEPP-4M collider with the KEDR detector is reported. The mass value is evaluated from the $\tau^+\tau^-$ cross section behaviour around the production threshold. The preliminary result based on 6.7 pb$^{-1}$ of data is $m_{\tau}=1776.80^{+0.25}_{-0.23} \pm 0.15$ MeV. Using 0.8 pb$^{-1}$ of data collected at the $\psi'$ peak the preliminary result is also obtained: $\Gamma_{ee}B_{\tau\tau}(\psi') = 7.2 \pm 2.1$ eV.Comment: 6 pages, 8 figures; The 9th International Workshop on Tau-Lepton Physics, Tau0