[en] The ISO 11137 and EN 552 standards were issued in the mid-90's. These documents have been devoted to the requirements regarding the sterile medical devices offered on the market. The implementation of those standards by Polish manufacturers of medical devices is discussed in this paper. The currently introduced national regulations effectively stimulated this process. The activities of the Institute of Nuclear Chemistry and Technology (INCT) in the field of radiation sterilization standardization and its radiation sterilization commercial service are described. (author)

[en] A overview of the techniques used by ANSTO's high-dose dosimetry laboratory is given, commencing with a description of the facilities operated and the nature of the services provided. The dosimetry systems used by ANSTO are detailed along with their applications. Techniques used for calibration of dosimeters and radiation sources are given, including traceability and measurement uncertainty considerations. Quality assurance aspects of the dosimetry service are discussed. (author)

[en] A number of experimental data reveal that ESR-dosimetry used for high doses sometimes fails as a result of radiation defect interactions at high radiation temperatures or after preliminary annealing stages, etc. Such interactions lead to non-linearities in the defect accumulation in a sample matrix vs. irradiation dose. The ways of accurate consideration of such effects by means of two phenomenological models are discussed. (author)

[en] High energy ionising radiation can be used to beneficially change the properties of plastic materials used in the manufacture of coated wires, cables and extruded tubings. For realisation of this process it is preferable to use electron accelerators as radiation sources. In the present study a scanned 2-MeV electron beam was used to irradiate the simulated objects and the real products. The determination of absorbed dose distribution in the irradiated objects was performed by using the thin polyethylene film equivalent to the insulating material. Equations of dose evaluations for 'figure eight' irradiation technique for the real products (thin wires and tubes) are given. (author)

[en] The effect of environmental factors, such as irradiation temperature and relative humidity, on the PVG dosifilm irradiated by EB was tested. Experiments show that the temperature coefficient of irradiated PVG dosifilm was 0.008 deg. C^-1 from 20 deg. C to 55 deg. C, and the humidity coefficient was 0.006 per r.h. (%) from r.h. 0% to 76%. The PVG dosifilm can be used as a routine dosimeter for dose measurement for low-energy EB processing. The absorbed dose values for various irradiation temperature and humidity can be corrected based on experimental data. (author)

[en] The radiation-induced effects of the electron beams (EB) generated by accelerators in typical calorimetric materials and sensors have been surveyed and investigated. These effects influence the useful lifetime of the materials and sensors at high doses of about 4,000 to 5,000 kGy. (author)

[en] One of the characteristic features of ion beam radiation experiments is that the absolute methods of dosimetry are more convenient than secondary ones. In this paper the absolute method used in the course of the radiation experiments performed on the U-400 Dubna cyclotron is presented in detail. Some remarks dealing with the secondary methods are also given. (author)

[en] Optical readout of the ethanol-chlorobenzene (ECB) or Dvornik dosimetry system is based on the development of the coloured secondary complex of ferric thiocyanate which has a maximum absorption at 485 nm. The applicability of a rugged, hand-held, battery powered filter colorimeter operating at 480 nm has been investigated as a reader for this purpose. This simple reader performs very well within absorbance one displaying an excellent linearity of absorbance with the concentration of Cl^- ions. It is shown that by choosing the appropriate dilution factor when preparing the secondary complex solution the entire useful dose range of the dosimeter up to 2 MGy can be covered. The applicability of this reader to some other liquid chemical dosimeters is also discussed. (author)

[en] This report presents the results of the High Dose Dosimetry Laboratory of Argentina during ten years of international intercomparisons for high dose with the International Dose Assurance Service (IDAS) of the IAEA, using the standard high dose dichromate dosimetry system, and the results of a high dose intercomparison regional exercise in which our Laboratory acted as a reference laboratory, using the standard high dose and low dose dichromate dosimetry system. (author)

[en] When performing radiation treatment of products using an electron beam much time and money should be spent for numerous measurements to make optimal choice of treatment mode. Direct radiation treatment simulation by means of the EGS4 computer code fails to describe such measurement results correctly. In the paper a multi-step radiation treatment planning procedure is suggested which consists in fitting the EGS4 simulation results to reference measurement results, and using the fitted electron beam parameters and other ones in subsequent computer simulations. It is shown that the fitting procedure should be performed separately for each material or product type. The procedure suggested allows to replace measurements by computer simulations and therefore reduces significantly time and money required for such measurements. (author)