[en] A description is given of the field application of a technique using CR-39 and LR 115 detectors to determine alpha recoil implanted ²¹⁰Po surface activity on domestic glass artefacts in dwellings. These investigations took place in two small stable rural communities in uraniferous areas of Yugoslavia where between 32% and 74% of contemporary indoor radon levels were found to be above the commonly used Action Level of 200 Bq m^-3 and individual levels as high as 8700 Bq m^-3 were measured. The ²¹⁰Po data is used to retrospectively estimate radon exposures in these communities. Comparisons between the retrospectively estimated radon exposures and those being received at present are made

[en] The detection characteristics for different kinds of cellulose nitrate as a function of water treatment between originate of latent alpha tracks and etching were determined. It has been shown that efficiency depends on their physico-chemical characteristics. Registration efficiency has been also determined for alpha particles for different kinds of cellulose nitrates as a function of uranium salts concentration. (author)

[en] The papers discusses some results of ionizing radiation effects in realization of non-destructive methods, achieved progress from the aspect of innovation, comparative results with previously used methods, etc. A review is given of methods based on alpha-radiography, auto-alpha radiography, beta-radiography, X-ray-fluorescent analysis, X- and gamma radiography, and photos of specific samples of neutron radiography

[en] The possible application of the CN-BDH (type 1) nitrocellulose detector synthesized in laboratory conditions, and also the CR-39 detector, to the measurement of the gross alpha-activity of geothermal and mineral water has been investigated. (author)

[en] Radon concentration measurement in the ground can be used for the prospecting for uranium and earthquake prediction. Some results of radon concentration measurement in the soil are presented here. The moisture condensation at the detector surface can affect on the detection efficiency. Due to this problem we tested a few filter papers on water permeability. The ratio of track densities on solid state nuclear track detector (SSNTD) in the open and the closed diffusion chamber is also determined. (author)

[en] Deconvolution peak glow of Mg B₄ O₇:Dy thermoluminescence spectra, with known radiation history, was investigated. Dosimeters did not receive doses higher than 60[mSv] during their radiation history. Dosemeters were irradiated by Co-60, gamma source from 0.2 mSv to 9 mSv of absorbed dose. Glow peak deconvolution separated from background by numerical analysis, chi-square fit of experimental data with theoretical models. Approximate models of first and second order of kinetics were applied. Results clearly show the advantages of applying numerical methods. (author)

[en] There are two reasons for measurement of radon concentration. On one hand, it causes grave health hazards to not only uranium miners but also people living in normal houses and buildings. On the other hand it helps in mineral exploration, earthquake prediction, study of volcanic activities, and search for geothermal energy sources. In this paper we have investigated possibilities of radon detection using passive detectors based on domestic industry activated charcoal and their relative detection efficiency is determined in comparison to commercial EPA detector. Also, minimum detectable activity for measuring radon is determined, effect on water gain, exposure time and counting efficiency. (author)

[en] The contents of radiocaesium and radiostrontium in broiler nutrients containing soy up to 17-24%, were investigated during 1985, and during a period of time after the Chernobyl accident (1986-87). The research was extended to investigation of contents of radiocaesium 137 and radiostrontium 90 and the changes in their concentration in the same kind of nutrients. In that way, we obtained the data about the increasing of the irradiation risk for fast fattening poultry if the soy rich nutrients are used. 7 refs., 2 figs., 1 tab. (Author)

[en] The Institute of Security has, in accordance with a directive from the Federal Government, designed and placed stationary monitors of gamma-radiation at border crossings at Kelebija, Horgos, Vatin, Gradina, Presevo, Djeneral Jankovic, Batrovci, and at the Djerdap-I shiplock. Some of the results of these protective measures are described in the paper. Radiological checks at border crossings are vital for every country, in view of current concerns over smuggling of strategic radioactive material, problems related to nuclear-waste disposal, etc. In the Federal Republic of Yugoslavia, several authorities are involved - including the Federal Secretariat for Labour,Health and Social Security, institutions responsible for protection against ionizing radiation, and institutes authorized in the field of operative dosimetric spot-checks - to ensure compliance with protocols for radiological controls at border crossings. (author)

[en] Full text: SUMMARY: The paper describes some of the results of the protection measures in the field of ionizing radiation at FRY border crossings where there were placed stationary monitors of gamma-radiation. The Institute of Security as licensed institution for ionizing radiation detection, designed and placed stationary devices MZ - 100 at border crossings check points named Kelebija, Horgos, Vatin, Gradina, Presevo, Djeneral Jankovic, Batrovci and the ship lock 'Djerdap-I'. CONCLUSION: Over the several years ago IAEA and its member states as well as other international organizations have become increasingly aware of the consequences which might result from illegal activities involving these materials. Therefore initiatives to strengthen physical protection regime are strongly supported and steps towards improving security of nuclear and other radioactive material have already been taken. Yugoslavia as IAEA member state wishes to contribute to the all together efforts in reducing the possibility of illegal activities such as theft, sabotage and trafficking, involving nuclear materials and other radioactive materials, and on the associated proliferation threat and radiation risks. Therefore relevant national bodies prepare project proposal titled 'PREVENTION OF ILLICIT TRAFFICKING IN NUCLEAR AND RADIOACTIVE MATERIALS IN THE FEDERAL REPUBLIC OF YUGOSLAVIA'. Significant work is ahead in this field, since harmonization of radiological control at our border crossings must be achieved. (author)