Publikationen
Multiactinide Analysis with Accelerator Mass Spectrometry for Ultratrace Determination in Small Samples: Application to an in Situ Radionuclide Tracer Test within the Colloid Formation and Migration Experiment at the Grimsel Test Site (Switzerland)
- Autor(en)
- Francesca Quinto, Ingo Blechschmidt, Carmen Garcia Perez, Horst Geckeis, Frank Geyer, Robin Golser, Florian Huber, Markus Lagos, Bill Lanyon, Markus Plaschke, Peter Steier, Thorsten Schaefer
- Abstrakt
The multiactinide analysis with accelerator mass spectrometry (AMS) was applied to samples collected from the run 13-05 of the Colloid Formation and Migration (CFM) experiment at the Grimsel Test Site (GTS). In this in situ radionuclide tracer test, the environmental behavior of U-233, Np-237, Pu-242, and Am-243 was investigated in a water conductive shear zone under conditions relevant for a nuclear waste repository in crystalline rock. The concentration of the actinides in the GTS groundwater was determined with AMS over 6 orders of magnitude from similar to 15 pg/g down to similar to 25 ag/g. Levels above 10 fg/g were investigated with both sector field inductively coupled plasma mass spectrometry (SF-ICPMS) and AMS. Agreement within a relative uncertainty of 50% was found for Np-237, Pu-242, and Am-243 concentrations determined with the two analytical methods. With the extreme sensitivity of AMS, the long-term release and retention of the actinides was investigated over 8 months in the tailing of the breakthrough curve of run 13-05 as well as in samples collected up to 22 months after. Furthermore, the evidence of masses 241 and 244 u in the CFM samples most probably representing Am-241 and Pu-244 employed in a previous tracer test demonstrated the analytical capability of AMS for in situ studies lasting more than a decade.
- Organisation(en)
- Isotopenphysik
- Externe Organisation(en)
- Karlsruher Institut für Technologie, Nationale Genossenschaft für die Lagerung radioaktiver Abfälle, Rheinische Friedrich-Wilhelms-Universität Bonn, Fracture Systems Ltd, Friedrich-Schiller-Universität Jena
- Journal
- Analytical Chemistry
- Band
- 89
- Seiten
- 7182-7189
- Anzahl der Seiten
- 8
- ISSN
- 0003-2700
- DOI
- https://doi.org/10.1021/acs.analchem.7b01359
- Publikationsdatum
- 07-2017
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103014 Kernphysik, 104002 Analytische Chemie
- Schlagwörter
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/9202dcf7-7e06-49e4-a0de-d2ac70a8e396