Development of radiation technologies on VNIIEF LU-10-20 linac

In the present article there is given a review of a number of last works conducted at VNIIEF with the use of this accelerator

Production of radiation destructant from spent butyl rubbers on the linac LU-10-20

Radiation methods of materials modification applied in technological chains can have significant economical and ecological advantages as compared to the established chemical, thermal and mechanical methods. Each year the problems of nature resources economy through the use of production and consumption wastes acquire a more significant value, as it allows to solve also ecological issues along with economical ones. This is mostly acute in relation to polymeric systems based on saturated rubbers, for example butyl rubber (BR) used in tyres industry, as due to their high resistance to the action of oxygen, ozone, solar radiation and bacteria they contaminate the environment for rather a long period. At VNIIEF and KSPU there were carried out experiments on application of electron beams with energy from 6 to 10 MeV for radiation destruction of spent rubber based on butyl rubber. Reclaim is tested in the formulation of initial diaphragm mixture, rubber mixture for producing rubberized fabric, roofing

A FLUID PRESSURE-LOADED SINGLE CRACK LOCATED IN A ROCK MASSIF PROPAGATION TRAJECTORY CALCULATION

The task solving results of a single crack filled with liquid under pressure propagation in a rock mass are presented. The rock mass is loaded with an unequal component gravitational field of stresses and represents a homogeneous elastic medium. The causes of the crack occurrence and its loading by internal pressure are not considered. In the task set, the rock mass is under conditions of a flat deformed state. In this paper, the effect of the opening on the stressed state of the rock mass and on crack propagation trajectory is not considered. The task is solved within the framework of classical concepts of the state of a crack, its stable and unstable growth in an infinite plate of brittle material, based on the theories of Griffiths - Irwin. Based on the results of the studies carried out, crack propagation trajectories are constructed for a number of the crack to the horizon inclination angle values, the characteristics associated with the strength of the enclosing rocks. An analysis is given of the critical pressures change during the crack intergrowt

First record of Artemia urmiana Günther, 1890 in Europe. An Integrated Interdisciplinary Study Case

Artemia urmiana has been recorded for the first time out of its nominal site (lake Urmia, Iran), in European territory (the Crimean peninsula, Ukraine). The species identification has been carried out on the basis of morphomnetry, SEM, molecular biology, with a multidisciplinary approach