Automated radiochemical analysis of total 99Tc in aged nuclear waste processing streams

O. B. Egorov; M. J. O’Hara; J. W. Grate

doi:10.1007/s10967-005-0635-7

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 263: Issue 3

Automated radiochemical analysis of total ⁹⁹Tc in aged nuclear waste processing streams

Authors:

O. B. Egorov

O. B. Egorov Pacific Northwest National Laboratory P.O. Box 999, Richland, WA 99352, USA

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M. J. O’Hara

M. J. O’Hara
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J. W. Grate

J. W. Grate
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Pages:: 629–633

Online Publication Date:: 24 Mar 2005

Publication Date:: 17 Feb 2005

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-005-0635-7

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Summary

A fully automated analysis procedure and instrument for the measurement of total ⁹⁹Tc in aged nuclear waste has been developed. The overall analysis approach is based on a fully automated wet radiochemical analysis method. Microwave-assisted sample oxidation is used prior to a chemical separation step in order to oxidize all of the non-pertechnetate species to pertechnetate. Separation of the pertechnetate from interfering radioactive and stable matrix species is carried out using an anion-exchange column. The separated ⁹⁹Tc is quantified using a flow-through solid cell scintillation detector. The instrument is capable of an analysis time of <13 minute per sample with a detection limit of 2000 dpm/ml. Nuclear waste samples from the Hanford site with a high content of non-pertechnetate species were successfully analyzed using this method.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)