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This exercise aims to assess the analytical performance of laboratories in the analysis of difficult-to-measure radionuclides in high activity steel.

January 18, 2026Journal of Radioanalytical and Nuclear Chemistry0 citationsOpen Access

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Intercomparison exercise of easy-to-measure and non-volatile difficult-to-measure analysis in homogenised high activity steel

ALAnumaija LeskinenVTT Technical Research Centre of Finland SJSimon JeromeNorconsult (Norway)NWNancy Nazem WannaBelgian Nuclear Research Centre

Key Points

This exercise aims to assess the analytical performance of laboratories in the analysis of difficult-to-measure radionuclides in high activity steel.
Conducted an intercomparison exercise following ISO 13528 standards.
Measured analytical performance using z scores to evaluate results.
Included comparison with activation calculation results.
Z scores were generally acceptable, indicating satisfactory laboratory performance.
Experimental results showed a wide range of compatibility with theoretical activation calculation results.

Abstract

Abstract Intercomparison exercises (IE) are a way for laboratories to test their analytical performance. In case of difficult-to-measure (DTM) radionuclide analysis, participation in IEs are important due to the lack of reference materials. This paper reports the results from an IE focusing on non-volatile DTM analysis in homogenised high activity steel. The IE was carried out according to the ISO 13528 standard, in which the performances are assessed using z score. The z scores were generally acceptable. The experimental results were compared with activation calculation results showing wide range of compatibility.

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Intercomparison exercise of easy-to-measure and non-volatile difficult-to-measure analysis in homogenised high activity steel

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