[en] An outline of the Secondary Standard Dosimetry Laboratories (SSDL) network program of the IAEA. (G.Q.)

[en] Results of the second national intercomparison of personal dosemeters are presented. We have chosen only the results for 70 kV X radiation quality which are relevant for radiological diagnostics. All results show dispersions which are probably caused by using various dosemeter types of various producers as well as by using non-uniform calibration conditions. (author)

[en] The National Laboratory for Ionizing Radiation Metrology/IRD has promoted an intercomparison among secondary and tertiary dosemeters which have been used as national standards in Latin America. Thirteen therapy level and five protection level dosemeters were brought by representatives, of eight countries and were compared against two reference dosemeters brought by an IAEA staff member. As far as the stablished limits for discrepancies are concerned it was possible to detect that therapy level secondary standard dosemeters failed in 4 conditions when 46 were used; therapy tertiary dosemeters failed in 5 of the 15 test conditions and the protection level secondary dosemeters showed 4 discrepancies during the 21 test conditions. The exercise emphasized the importance of intercomparisons as part of a quality control programme to garantee the metrological quality and the coherency of standard dosemeters with international metrological system. (author)

[en] Results from a confirmatory survey of the upper structural surfaces of the Reactor Building Dome at the Rancho Seco Nuclear Generating Station (RSNGS) performed by the Oak Ridge Institute for Science and Education for the NRC. Also includes results of interlaboratory comparison analyses on several archived soil samples that would be provided by RSNGS personnel. The confirmatory surveys were performed on June 7 and 8, 2006

[en] The measurement of radioactivity concentrations in urine samples is an important tool for the monitoring of possible radionuclide intakes by occupationally exposed workers, especially for those radionuclides emitting alpha or beta radiation. The new German guideline for requirements for measuring laboratories requires measures for standardisation and quality assurance by all laboratories responsible for such measurements. For this purpose the working group 'Incorporation Monitoring (AKI)' of the German-Swiss Radiation Protection Association has already performed, in the period from 1981 to 1997, interlaboratory comparisons of uranium, thorium, americium, lead, strontium and tritium in urine. The results and their implications for internal dosimetry are presented. (author)

[en] A brief description is given of a comparison of dosimetric instruments from 17 institutions in Czechoslovakia, Austria and Germany, which was conducted in Czechoslovakia in September 1990. The results gave evidence of a good standard of measuring instrumentation in use in Czechoslovakia, which improved appreciably after the Chernobyl accident. (Z.M.)

[en] The Ionizing Radiations Metrology Forum (IRMF) organized a second intercomparison of calibrations of gamma-ray dose-rate monitors in which sixteen establishments in the UK participated. The exercise involved the circulation of four gamma-ray monitors for calibration the fields produced using ¹³⁷CS, ⁶⁰Co and ²⁴¹Am. The instruments used were an NE Technology PDM1B, a Mini-Instruments Mini-Rad (1000R), a Mini-Instruments Mine-900 with 44a Probe and a Siemens Electronic Personal Dosemeter. All results were submitted to the authors for analysis. Responses relative to 'true' air-kerma rate, as state by the individual participants, were calculated. The results, reported anonymously, are compared and demonstrate generally satisfactory agreement between establishments

[en] The main characteristics of four standard radon chambers are described. These facilities were selected by the Organization of Economic Cooperation and Development (OECD) and the Commission of the European Communities (CEC) as regional reference centres for intercalibration and intercomparison of passive and active techniques for the monitoring of radon, thoron and daughters. The important parameters of these chambers are compared with those of the newly constructed Paul Scherrer Institute (PSI) radon chamber. The methods of intercalibration and the results obtained for the PSI chamber are discussed. (author). 18 refs, 1 tab

[en] In the original publication of the article, the values of u(s), u(r) and ITV for HKED were published incorrectly in Table 6. (authors)

[en] Results of an intercomparison of environmental thermoluminescence dosemeters from laboratories of selected CMEA countries are presented. The method of intercomparison is described and attention is paid to the estimation of the field dose delivered under the conditions of radioactive pollution after the Chernobyl accident. If each participant's mean dose alone is used for the statistical evaluation of results, overall acceptability is much higher than if each participant's dose along with the whole confidence interval, as appears more correct, is taken into account. (author)