Report - NUCLEUS - IAEA

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“The Mission of the IAEA Department of Nuclear Sciences and Applications is to contribute to sustainable development in Member States through the use of nuclear sciences and their applications in food and agriculture, human health, industry, water resources management, and environment monitoring, research and protection, with due regard to safety”. Page iv iv
Executive summary The Chemistry Unit of the Physics, Chemistry and Instrumentation Laboratory in the IAEA's Seibersdorf Laboratory in Austria, has the programmatic responsibility to support global radionuclide measurement systems, in issues of international concern related to an accidental or intentional release of radioactivity in the environment. To fulfil this obligation and ensure a reliable worldwide, rapid and consistent response, the Chemistry Unit coordinates an international network of Analytical Laboratories for the Measurement of Environmental Radioactivity (ALMERA). The network, established by the IAEA in 1995 [1] [2] [3], makes available to Member States a world-wide network of analytical laboratories capable of providing reliable and timely analysis of environmental samples in the event of an accidental or intentional release of radioactivity. The network is a technical collaboration of existing institutions. It provides an operational framework to link expertise and resources, in particular when a boundary-transgressing contamination is expected or when an event is of international significance. A primary requirement of the ALMERA members is participation in the IAEA interlaboratory comparison exercises which are specifically organized for ALMERA on a regular basis. These exercises are designed to monitor and demonstrate the performance and analytical capabilities of the network members, and to identify gaps and problem areas where further development is needed. Continued membership has benefits in training and educational opportunities, enhanced mutual trust in results and methodology and objective evidence for accreditation purposes. Page 5 The performance evaluation results of the interlaboratory comparison exercises performed in the frame of the ALMERA network are not anonymous for those laboratories nominating to participate as ALMERA members. In the interlaboratory exercise described in this report, 195 test samples (matrix reference materials) were prepared and distributed to the participating laboratories in June 2006. Laboratories were sent samples containing known activities of gamma emitting radionuclides in three matrices (soil, grass and water), and were requested to return the results within three days of receipt of the samples (short-term reporting). The participating laboratories were requested to analyse the samples employing the methods used in their routine work, so that their performance on the test samples could be directly related to the real performance of the rapid reporting. Thirty eight laboratories (Table 1) from sixty five initially registered laboratories, reported their results to the IAEA. The analytical results of the participating laboratories were compared with the reference values assigned to the reference materials, and a rating system was applied. Table 2 reports a summary evaluation of this proficiency test. The proficiency test results has demonstrated that in the case of 40 K, 54 Mn, 60 Co, 65 Zn, 134 Cs, 137 Cs and 241 Am the majority of the participating laboratories could produce analytical results within acceptable time limit and which is satisfactory and comparable within the network. For these radionuclides the accepted results ranged between 70 to 95 %. The proficiency test results show that the determination of the activity concentrations of 109 Cd and 210 Pb were the most problematic and it was found that
Page 1: Report on the IAEA-CU-2006-04 ALMER
Page 4 and 5: Contact information Abdulghani Shak
Page 8 and 9: more than 50 % of the participating
Page 10 and 11: Lab Page 8 241 Am 109 Cd 60 Co Soil
Page 12 and 13: 1. Introduction The Chemistry Unit
Page 14 and 15: allows estimating the reference val
Page 16 and 17: Page 14 Radionuclide Soil sample 01
Page 18 and 19: Radionuclide Page 16 210 Pb 241 Am
Page 20 and 21: Page 18 A2 = 3.2.2 Precision 2 2 2.
Page 22 and 23: Radionuclide Page 20 Soil sample 01
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Lab code Lab. Value Lab. Unc. Unc.
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The IAEA-CU-2006-04 ALMERA open pro
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Appendix D: List of participating l
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GERMANY LAB CODE 291 ENVIRONMENTAL
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NORWAY LAB CODE 303 HEALTH & SAFETY
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