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Title: Ion-beam irradiation and 244Cm-doping investigations of the radiation response of actinide-bearing crystalline waste forms

Abstract

Abstract

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Materials Science of Actinides (MSA)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1385670
DOE Contract Number:
SC0001089
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Materials Research; Journal Volume: 30; Journal Issue: 09; Related Information: MSA partners with University of Notre Dame (lead); University of California, Davis; Florida State University; George Washington University; University of Michigan; University of Minnesota; Oak Ridge National Laboratory; Oregon state University; Rensselaer Polytechnic Institute; Savannah River National Laboratory
Country of Publication:
United States
Language:
English
Subject:
nuclear (including radiation effects), materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly)

Citation Formats

Yudintsev, Sergey V., Lizin, Andrey A., Livshits, Tatiana S., Stefanovsky, Sergey V., Tomilin, Sergey V., and Ewing, Rodney C. Ion-beam irradiation and 244Cm-doping investigations of the radiation response of actinide-bearing crystalline waste forms. United States: N. p., 2015. Web. doi:10.1557/jmr.2015.23.
Yudintsev, Sergey V., Lizin, Andrey A., Livshits, Tatiana S., Stefanovsky, Sergey V., Tomilin, Sergey V., & Ewing, Rodney C. Ion-beam irradiation and 244Cm-doping investigations of the radiation response of actinide-bearing crystalline waste forms. United States. doi:10.1557/jmr.2015.23.
Yudintsev, Sergey V., Lizin, Andrey A., Livshits, Tatiana S., Stefanovsky, Sergey V., Tomilin, Sergey V., and Ewing, Rodney C. 2015. "Ion-beam irradiation and 244Cm-doping investigations of the radiation response of actinide-bearing crystalline waste forms". United States. doi:10.1557/jmr.2015.23.
@article{osti_1385670,
title = {Ion-beam irradiation and 244Cm-doping investigations of the radiation response of actinide-bearing crystalline waste forms},
author = {Yudintsev, Sergey V. and Lizin, Andrey A. and Livshits, Tatiana S. and Stefanovsky, Sergey V. and Tomilin, Sergey V. and Ewing, Rodney C.},
abstractNote = {Abstract},
doi = {10.1557/jmr.2015.23},
journal = {Journal of Materials Research},
number = 09,
volume = 30,
place = {United States},
year = 2015,
month = 2
}
  • Volatilizations of molybdenum and ruthenium during the fixation of simulated high-level radioactive waste in modified SYNROC-B crystalline ceramic waste forms have been studied using a radiotracer technique. The simulated waste loading was 20 wt%. The volatilization figures of merit (VFMs) for /sup 99/Mo and /sup 103/Ru have shown a behavior that depends on the type of sintering atmosphere, i.e., oxidizing versus reducing. The experimentally obtained VFM /SUB Mo/ and VFM /SUB Ru/ in an oxidizing atmosphere are 7.8 and 3.7% of the initial radioactivity of each nuclide per gram of sintered SYNROC-B product after sintering at 1510 K in air,more » while under reducing conditions (50% H/sub 2/-50% Ar), VFM /SUB Mo/ and VFM /SUB Ru/ have been reduced to 2.8 and 1.8% g/sup -1/, respectively. Solidification of high-level radioactive waste in the proposed waste form or in glass matrices under reducing atmosphere is recommended to minimize the amounts of volatilization and, subsequently, to reduce the safety requirements of the off-gas treatment system of the vitrification and/or solidification plant.« less
  • Interactions between the glass and crystalline phases of ceramic waste forms were investigated via powder X-ray diffraction, scanning electron microscopy, and Si-29, Al-27, Na-23, Li-7, and Cl-35 magic angle spinning nuclear magnetic resonance spectroscopy. LiCl, NaCl, or KCl waste form samples were made with or without glass. The waste forms containing glass consist of sodalite and glass phases with minor amounts of nepheline. Samples without glass form varying amounts of sodalite and nepheline. The glass frit, intended to bind the zeolite particles together, changes in composition, showing marked increases in aluminum and alkali content.
  • Three crystalline ceramic materials, which occur as host phases for the long-lived actinides in many nuclear waste formulations, were doped with Cm-244, and the effects of self-radiation damage from alpha decay on microstructure and physical properties were investigated. The irradiation-induced microstructure consisted of individual amorphous tracks from both the alpha-recoil particles and the spontaneous fission fragments. The eventual overlap of the tracks at higher doses leads to a completely amorphous state. This radiation-induced amorphization process results in measured increases in volume, leachability, and stored energy. Thermal recovery of the radiation-induced swelling and amorphization occurs with full recrystallization to the initialmore » structures. 21 references, 5 figures, 2 tables.« less