[en] Energy resources in use today, except hydropotentials, are unrecoverable and therefore their use as rational as possible is crucial in all exploitation stages up to the final use. The paper treates using i.e. efficiency of using those reserves through the stages of exploitation, preparation and conversion in existing plants and by application of todays technology phases. Considering those phases, possible development with regard to increase of future efficiency doefficient is estimated, based on so far available information on advance of research work in those fields. Whenever we had available reliable data, comparison has been made in our country with the efficiency state of those three phases

No abstract available

No abstract available

[en] A fast algorithm for reactivity determination from a sequence of neutron flux values is developed and tested. In the present development phase, the algorithm is realized as an off-line program RODCAL on the process computer CDC 170O. The essential result of the present work in using the algorithm for the determination of antireactivity of the control rods in reactor TRIGA is great accuracy of the results obtained even with slow saMpling rates of 1 to 5 samples per second. The goal of further work is the adaptation of the reactivity monitor for its use in reactor working at power by the incorporation into the monitor the dynamic model of the reactor

[en] The study presents the results of radon measurements in 558 apartments in the Republic of Serbia. We analyzed the obtained results depending on the type of building, number of floors, year of construction, type of heating and the types of material the buildings were constructed from. It was found that the greatest radon concentration was in basement and ground floor apartments of private houses, heated with coal and built of bricks. (author)

[en] 'LUDEP' (LUng Dose Evaluation Program) is a computer program for IBM-compatible personal computers, for calculating internal doses using the ICRP Publication 66 Respiratory tract model. This program, also, enables the user to calculate doses and dose rates from intakes of radionuclides to other body organs for a wide range of user-defined conditions. There are the facilities for fitting the calculated data to experimental data. This program includes databases containing the ICRP Publication 30 biokinetic models, ICRP Publication 38 radionuclide decay data and ICRP Publication 54 excretion functions. (author)

[en] In this paper, two calibration procedure (in water phantom and in air) for high activity brachytherapy source (¹⁹²Ir) are compared. Difference in certain air kerma rate determined by two independent methods was less than 2.5%. (author)

[en] The paper presents the results of comparative analysis of haematological parameters (mean values of blood cells and haemoglobins) in group of persons professionally exposed to ionizing radiation. Obtained results are matched with appropriate controls. The examination was performed during 1997 year. (author)

[en] A number of devices are routinely used for collimation and beam diagnostics at accelerator installations. Some of them permanently cuts-off parts of the accelerated particles forming a distinct beam shape (slits and diaphragms). Others are used from time to time to give information on beam shape or current by intercepting the beam (Faraday cups, scintillators, wire grids). Due to a number of nuclear reactions resulted by the interaction of energetic particles with matter, these devices are strong sources of ionizing radiation and they must be considered in the shielding design procedure. The fast neutron equivalent dose rate is calculated for a certain lay-out of beam diagnostic elements at the 'Tesla' Accelerator Installation and their contribution to the equivalent dose is discussed. (author)

[en] X-rays instrument Baltobloc 200/3-Yu is intended for luggage and consignment survey. It is simple constructed, easy and reliable for manipulation. By dosimetry control is concluded that instrument is safe for using with regard to X-rays. (author)