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Borzov I.N.,Obninsk Institute of Physics and Power Engineering | Saperstein E.E.,RAS Research Center Kurchatov Institute | Tolokonnikov S.V.,RAS Research Center Kurchatov Institute | Neyens G.,Catholic University of Leuven | Severijns N.,Catholic University of Leuven
European Physical Journal A | Year: 2010

Dipole magnetic moments of several long isotopic chains are analyzed within the self-consistent finite Fermi system theory with exact account for the pairing and quasiparticle continuum. The momentum dependence of the spin-isospin Landau-Migdal amplitude g′ is taken into account. This dependence was introduced previously to describe high-energy electron magnetic scattering. New moment data for nuclei far from the β-stability valley are included in the analysis. For a number of semi-magic isotopes of the tin and lead chains a good description of the data is obtained, with an accuracy of 0.1-0.2μN. A chain of non-magic isotopes of copper is also analyzed in detail. © 2010 SIF, Springer-Verlag Berlin Heidelberg.

Raskach K.F.,Obninsk Institute of Physics and Power Engineering
Physics of Atomic Nuclei | Year: 2012

In multigroup calculations of reactivity and sensitivity coefficients, methodical errors can appear if the interdependence of multigroup constants is not taken into account. For this effect to be taken into account, so-called implicit components of the aforementioned values are introduced. A simple technique for computing these values is proposed. It is based on the use of subgroup parameters. © 2012 Pleiades Publishing, Ltd.

Van Den Bosch J.,Belgian Nuclear Research Center | Van Den Bosch J.,Los Alamos National Laboratory | Almazouzi A.,Belgian Nuclear Research Center | Almazouzi A.,Electricite de France | And 2 more authors.
Journal of Nuclear Materials | Year: 2011

Thin wall tubes with suitable dimensions for possible future use as nuclear fuel cladding based on ferritic-martensitic steel T91 have been produced. Several rolling routes for thin wall tube rolling have been successfully explored to produce T91 tubes of 8.5 mm OD and 0.5 mm wall thickness as well as 6.5 mm OD and 0.5 mm wall thickness. The results show that the cold rolled 91 steel thin walled tubes remain ductile and the material easily carries fractional strains. Finally the microstructure of the resulting tubes was examined and preliminary burst and tensile tests were performed showing properties comparable to those of T91 plate material. © 2011 Published by Elsevier B.V.

Rezvykh K.A.,Obninsk Institute of Physics and Power Engineering | Romanov V.A.,Obninsk Institute of Physics and Power Engineering
24th Russian Particle Accelerator Conference, RuPAC 2014 | Year: 2014

New effective technique of conditioning of gaseous insulation of electrostatic accelerator is described. To achieve stable breakdown voltage, accelerator conditioning procedure would take 7-8 hours (volume of pressure tank is 93 m ). Three methods of monitoring cleanness of gaseous insulation are proposed. © 2014 CC-BY-3.0 and by the respective authors.

Rohde U.,Helmholtz Center Dresden | Pivovarov V.,Obninsk Institute of Physics and Power Engineering | Matveev Y.,Obninsk Institute of Physics and Power Engineering
Kerntechnik | Year: 2012

The multi-group version of the DYN3D reactor dynamics code was used for calculations for a new concept of a boiling water reactor with tight lattice of fuel rods and reduced neutron moderation. For that purpose, a 5-group cross section library was prepared and connected to the DYN3D code. Comparison calculations with the steady-state finite-difference code ACADEM showed a very good agreement. The capability of the DYN3D multi-group code in modeling transients in boiling water reactors with tight fuel element lattices was demonstrated by the analysis of two reactivity accidents initiated by the ejection of one control rod and unauthorized withdrawal of a control rod bank from the reactor core. The corresponding analyses were performed for begin of cycle conditions, when the considered control rods are at their maximum insertion depth. © Carl Hanser Verlag München.

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