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Preparation and Characterization of Borosilicate Glass Waste Form for Immobilization of HLW from WWER Spent Nuclear Fuel Reprocessing

Published online by Cambridge University Press:  19 December 2016

S.V. Stefanovsky ,
M.V. Skvortsov ,
O.I. Stefanovsky ,
B.S. Nikonov ,
I.A. Presniakov ,
I.S. Glazkova  and
A.G. Ptashkin
S.V. Stefanovsky*
Affiliation:
Frumkin Institute of Physical Chemistry and Electrochemistry (IPCE) , Russian Academy of Sciences, Federal Agency of Science Organizations, 31-4 Leninskii av, Moscow 119071 Russia
M.V. Skvortsov
Affiliation:
D. Mendeleev University of Chemical Technology, Miusskaya sq. 9, 125047 Moscow, Russia
O.I. Stefanovsky
Affiliation:
Frumkin Institute of Physical Chemistry and Electrochemistry (IPCE) , Russian Academy of Sciences, Federal Agency of Science Organizations, 31-4 Leninskii av, Moscow 119071 Russia
B.S. Nikonov
Affiliation:
Institute of Geology of Ore Deposits, Mineralogy, Petrography, and Geochemistry, Russian Academy of Sciences, Federal Agency of Science Organizations, Staromonetnii lane 35, Moscow 11017 Russia
I.A. Presniakov
Affiliation:
Lomonosov Moscow State University, Radiochemistry division, Vorobyovy Gory, 1, Building 10, Moscow 119991 Russia
I.S. Glazkova
Affiliation:
Lomonosov Moscow State University, Radiochemistry division, Vorobyovy Gory, 1, Building 10, Moscow 119991 Russia
A.G. Ptashkin
Affiliation:
Frumkin Institute of Physical Chemistry and Electrochemistry (IPCE) , Russian Academy of Sciences, Federal Agency of Science Organizations, 31-4 Leninskii av, Moscow 119071 Russia
*
*(Email: serge.stefanovsky@yandex.ru)
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Abstract

Borosilicate glassy materials for immobilization of HLW from Russian WWER (PWR) spent nuclear fuel reprocessing were designed, synthesized in a resistive furnace, and characterized by XRD, SEM/EDS, and FTIR spectroscopy. Chemical durability was determined by PCT-A procedure and compared to EPA glass and reference data. The glasses with 20 and 25 wt.% waste loading were found to be X-ray amorphous, homogeneous and chemically durable. Glass network formally had a relatively low degree of connectedness that was increased due to embedding of different structural groups thus improving chemical durability. Boron is present primarily in trigonal oxygen coordination. The glasses with 40-45 wt.% waste loading contained minor britholite phase concentrating rare earth elements and as expected trivalent actinides. Glassy product with up to 30 wt.% waste loading was also produced by cold crucible inductive melting at the IPCE RAS lab-scale unit equipped with 56 mm inner diameter copper cold crucible and energized from a 10 kW/5.28 MHz generator. The product was composed of vitreous phase and minor britholite with average composition K0.39Sr1.99Fe0.16Nd5.50Si7.96O26.60.

Keywords

infrared (IR) spectroscopywaste managementx-ray diffraction (XRD)
Type
Articles
Information
MRS Advances , Volume 2 , Issue 11: Scientific Basis for Nuclear Waste Management XL , 2017 , pp. 583 - 589
Copyright
Copyright © Materials Research Society 2016 

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References

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