XAS and XRF investigation of an actual HAWC glass fragment obtained from the Karlsruhe vitrification plant (VEK)

Dardenne, Kathy; González-Robles, E.; Rothe, Jörg; Müller, Nikolaus; Christill, G.; Lemmer, D.; Praetorius, R.; Kienzler, Bernhard; Metz, Volker; Roth, Georg; Geckeis, Horst

doi:10.1016/j.jnucmat.2015.02.021

Cited by 16 publications

(13 citation statements)

References 40 publications

(40 reference statements)

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“…On the other hand, it is also possible by following the latter procedure, to re-interpret former results obtained by Hess et al [12] and Dardenne et al [10] on nuclear waste forms, where Zr K-edge XANES spectra show clearly the major Zr octahedral site of symmetry contribution, mixed with a smaller one from a sevenfold site of symmetry.…”

Section: Xanes At Zr K-edgesupporting

confidence: 52%

“…6, XANES curves for both glasses do not show any subtle changes in WL and edge energy positions, whereas the WL normalized intensity lowers from 0.45 to 0.36, which could reflect a local change in Pu environment, or oxidation state. Comparison of the WL and edge positions for the glasses with PuO 2 standard (F=0.34, Table 4), seems to show that Pu stays in a ?4 oxidation state, as already reported in many works from Hess [12], Dardenne [10], Lopez [13] and Grambow [31]. However, the examination of spectra where Pu appears in ?4, ?5 and ?6 oxidation states [19,32] shows that the WL and edge energy positions are quite similar.…”

Section: Xanes At Pu L 3 -Edgementioning

confidence: 61%

“…Apart from the measurements of macroscopic physical quantities, like density, hardness or mechanical properties [6], considering the radioactive nature of the samples, sparse experimental techniques are available to investigate the glass structure under self-irradiation condition such as vibrational Raman technique [7,8], X-Ray Fluorescence (XRF), X-ray Absorption Spectroscopy (XAS) [6,7,[9][10][11][12][13] and more recently Nuclear Magnetic Resonance (NMR) [14].…”

Section: Introductionmentioning

confidence: 99%

“…A more refined study using a Cm-doped borosilicate glass highlighted the local environment of Cm 3þ by the combination of laser spectroscopy and XAS [9]. More recently, XAS and XRF experimental techniques were applied to a vitrified highly radioactive waste concentrate from German spent fuel nuclear power plants [10]. Moreover, large investigations of specific nuclear glasses SON68 (inactive R7T7 French nuclear waste glass [16]), Cmdoped, are still underway by French Atomic Energy Commission (CEA), in terms of vibrational Raman spectroscopy and macroscopic property measurements [6].…”

Section: Introductionmentioning

confidence: 99%

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XANES analysis of a Cm-doped borosilicate glass under $$\alpha $$ α -self-irradiation effects

Bouty

Ramond²,

Solari

et al. 2016

J Mater Sci

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Industrial borosilicate glasses containing fission products and minor actinides can be subjected to structural damage caused mainly by a-self-irradiation effects. In this field of glasses under extreme conditions, we present an X-ray Absorption Near-Edge Structure investigation of two six-oxide borosilicate curium-doped glasses (based on the International Simplified Glass (ISG) composition). The first sample is an 8-year ISG damaged glass, which has already accumulated an a-decay dose greater than 6.10 18 a g À1 , a value corresponding to a damaged but stabilized structural state. The second sample results from annealing of the latter ISG damaged glass. Three species, Cm, Pu and Zr were probed at L 3 -edge, L 3 -edge and K-edge, respectively. From the experimental results, Cm and Pu species appear respectively in ?3 and ?4 oxidation states in both glasses. No Cm local environment changes are observed. In contrast, a small variation in Pu local environment appears between the damaged and annealed glasses, reflecting a possible coordination variation or Pu-Zr substitution. A more drastic effect appears for Zr local environment, where a sevenfold coordinated site grows over time under a-self-irradiation effects, at the expense of the initial major sixfold site of symmetry. Moreover, annealing the damaged glass does not permit to retrieve a similar structural state to the one of a just melted curium-doped ISG.

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Section: Xanes At Zr K-edgesupporting

confidence: 52%

Section: Xanes At Pu L 3 -Edgementioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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XANES analysis of a Cm-doped borosilicate glass under $$\alpha $$ α -self-irradiation effects

Bouty

Ramond²,

Solari

et al. 2016

J Mater Sci

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“…In 2013, as a pilot experiment for projected XAS studies of genuine HLW matrices at INE-Beamline and the future ACT lab, a mm-sized HLW-glass fragment with a mass < 1 mg and a contact dose rate of ~590 µSv/h was removed from the INE shielded box-line and loaded into a specially designed Plexiglas sample holder. Initial speciation investigations by fluorescence yield XAFS at the INE-Beamline [16] were focused on the long-lived fission products Se and Tc, and the actinide elements which are expected to be released consecutive to degradation of the HLW-glass [17]. To our knowledge, this was for the first time ever that measurements on such a material from a radioactive industrial vitrification process had been conducted at an SR experimental station.…”

Section: Highlights Of Past Research Projectsmentioning

confidence: 99%

Fifteen Years of Radionuclide Research at the KIT Synchrotron Source in the Context of the Nuclear Waste Disposal Safety Case

Rothe¹,

Altmaier²,

Dagan³

et al. 2019

Geosciences

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For more than 120 years, systematic studies of X-ray interaction with matter have been the basis for our understanding of materials—both of natural or man-made origin—and their structure-function relationships. Beginning with simple radiographic imaging at the end of the 19th century, X-ray based analytical tools such as X-ray diffraction, X-ray fluorescence and photoemission or X-ray absorption techniques are indispensable in almost any field of chemical and material sciences—including basic and applied actinide and radionuclide studies. The advent of dedicated synchrotron radiation (SR) sources in the second half of the last century has revolutionized the analytical power of X-ray probes, while—with increasing number of SR facilities—beamline instrumentation followed a trend towards increasing specialization and adaption to a major research topic. The INE-Beamline and ACT station at the KIT synchrotron source belong to the exclusive club of a few synchrotron beamline facilities—mostly located in Europe—dedicated to the investigation of highly radioactive materials. Since commissioning of the INE-Beamline in 2005, capabilities for synchrotron-based radionuclide and actinide sciences at KIT have been continuously expanded, driven by in-house research programs and external user needs.

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The interaction of selenite and ferrous ions in presence or absence of granite

2022

J Radioanal Nucl Chem

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XAS and XRF investigation of an actual HAWC glass fragment obtained from the Karlsruhe vitrification plant (VEK)

Cited by 16 publications

References 40 publications

XANES analysis of a Cm-doped borosilicate glass under $$\alpha $$ α -self-irradiation effects

XANES analysis of a Cm-doped borosilicate glass under $$\alpha $$ α -self-irradiation effects

Fifteen Years of Radionuclide Research at the KIT Synchrotron Source in the Context of the Nuclear Waste Disposal Safety Case

The interaction of selenite and ferrous ions in presence or absence of granite

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