Intercomparison exercise on difficult to measure radionuclides in activated concrete - Statistical analysis and comparison with activation calculations

Anumaija Leskinen (1) , Céline Gautier (2) , Antti Räty (1) , Tommi Kekki (1) , Elodie Laporte (3) , Margaux Giuliani (3) , Jacques Bubendorff (3) , Julia Laurila (4, 5) , Kristian Kurhela (4, 5) , Pascal Fichet (3) , Susanna Salminen-Paatero (4)

1 Technical Research Centre of Finland
2 SEARS - Service d'études analytiques et de réactivité des surfaces
3 LASE - Laboratoire d’analyse en soutien aux exploitants
4 TKK - TKK Helsinki University of Technology
5 Helsinki Metropolia University of Applied Sciences

This paper reports the results obtained in a Nordic Nuclear Safety Research project during the second intercomparison exercise for the determination of difficult to measure radionuclides in decommissioning waste. Eight laboratories participated by carrying out radiochemical analysis of 3H, 14C, 36Cl, 41Ca, 55Fe and 63Ni in an activated concrete. In addition, gamma emitters, namely 152Eu and 60Co, were analysed. The assigned values were derived from the submitted results according to ISO 13,528 standard and the performance assessments were determined using z scores. The measured results were compared with activation calculation result showing varying degree of comparability.

Mots clés: Difficult to measure radionuclides; intercomparison exercise; decommissioning waste; concrete; biological shield; ISO 13528

Domaines: Chimie inorganique

Anumaija Leskinen, Céline Gautier, Antti Räty, Tommi Kekki, Elodie Laporte, et al.. Intercomparison exercise on difficult to measure radionuclides in activated concrete - Statistical analysis and comparison with activation calculations. Journal of Radioanalytical and Nuclear Chemistry, 2021, ⟨10.1007/s10967-021-07824-7⟩. ⟨cea-03783338⟩