60Co in cast steel matrix: A European interlaboratory comparison for the characterisation of new activity standards for calibration of gamma-ray spectrometers in metallurgy

• Published in: Applied radiation and isotopes Vol. 114; pp. 167 - 172
• Main Authors: Tzika, Faidra, Burda, Oleksiy, Hult, Mikael, Arnold, Dirk, Marroyo, Belén Caro, Dryák, Pavel, Fazio, Aldo, Ferreux, Laurent, García-Toraño, Eduardo, Javornik, Andrej, Klemola, Seppo, Luca, Aurelian, Moser, Hannah, Nečemer, Marijan, Peyrés, Virginia, Reis, Mario, Silva, Lidia, Šolc, Jaroslav, Svec, Anton, Tyminski, Zbigniew, Vodenik, Branko, Wätjen, Uwe
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-08-2016; Elsevier
• Subjects: Cast steel, metallurgy; EURAMET; Gamma-ray spectrometry; Intercomparison exercise; Ionising radiation; Metrology; Nuclear Experiment; Physics; Metrology; EURAMET; Gamma-ray spectrometry; Intercomparison exercise; Ionising radiation; Cast steel, metallurgy; UNCERTAINTY; metallurgy; Cast steel
• ISSN: 0969-8043; 1872-9800
• DOI: 10.1016/j.apradiso.2016.05.014

Two series of activity standards of 60Co in cast steel matrix, developed for the calibration of gamma-ray spectrometry systems in the metallurgical sector, were characterised using a European interlaboratory comparison among twelve National Metrology Institutes and one international organisation. The first standard, consisting of 14 disc shaped samples, was cast from steel contaminated during production (“originally”), and the second, consisting of 15 similar discs, from artificially-contaminated (“spiked”) steel. The reference activity concentrations of 60Co in the cast steel standards were (1.077±0.019) Bqg−1 on 1 January 2013 12h00 UT and (1.483±0.022) Bqg−1 on 1 June 2013 12h00 UT, respectively.
•A comparison was run on measurement of 60Co activity in two batches of cast steel.•The samples were measured using high resolution gamma-ray spectrometry.•Different experimental and computational efficiency calibration methods were used.•Two new standards with 60Co in steel matrix are available for metallurgy.•The standards´ reference activity contents were determined from comparison results.