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Rostock 2019 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 4: Accelerator Mass Spectrometry and Applications

MS 4.1: Talk

Wednesday, March 13, 2019, 10:30–10:45, U A-Esch 2

Proof of suitability of 41Ca as a reference isotope for the characterization of reactor concrete — •R. Spanier1, S. Heinze1, M. Schiffer1, A. Stolz1, G. Hackenberg1, S. Herb1, L. Bussmann1, C. Müller-Gatermann1, A. Dewald1, R. Magreiter2, E. Strub2, M. Michel2, K. Eberhardt3, M. Dewald4, and B. Dittmann41Institut für Kernphysik, Köln, Deutschland — 2Abteilung Nuklearchemie, Köln, Deutschland — 3Institut für Kernchemie, Mainz, Deutschland — 4Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) GmbH

In the field of nuclear waste management reference isotopes are important for the radiological characterization of the radioactive material. Often 60Co or 152Eu are used for this purpose as they are relatively easy to measure by means of gamma ray spectroscopy. The disadvantages are the relatively short half-lives and in the case of reactor concrete these seed materials 59Co or 151Eu are contained only as trace elements and homogeneity of the seed material in a large amount of material is not guaranteed. Thus, these reference nuclides are not very well suited if longer storage and control is needed. Therefore, we investigated the suitability of 41Ca as a reference isotope for reactor concrete e.g. originating from the bio-shield of a nuclear power station. We measured 41Ca concentration of irradiated samples at the 6MV TANDETRON AMS set-up of the University of Cologne. The 41Ca was chemically extracted as CaF to produce a sputter target for the AMS measurement . We will report on the results with respect to sensitivity and precision obtained so far.

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