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Title: Properties and behavior of the platinum group metals in the glass resulting from the vitrification of simulated nuclear fuel reprocessing waste

Abstract

Two types of platinum group metal particles were found in borosilicate nuclear waste glasses: needle-shaped RuO{sub 2} particles and spherical PdRh{sub {ital x}}Te{sub {ital y}} alloys. They form a dense sediment of high electrical conductivity and relatively high viscosity at the bottom of the ceramic melting furnace. The sludge shows a non-Newtonian flow behavior. The viscosity and conductivity of the sludge depend not only on the platinum group metal content but also on the texture and morphology of the RuO{sub 2} particles. RuO{sub 2} forms long, needle-shaped crystals which are caused by alkalimolybdate salt melts that formed in the calcine layer. The salt melts oxidize the Ru present as small RuO{sub 2} particles after calcination to higher oxidation states. Ruthenium (VI) compounds are formed, presumably, which are not stable with respect to RuO{sub 2} under the melting conditions. RuO{sub 2} precipitates and crystallizes into long, needle-like particles.

Authors:
 [1];  [2]
  1. Bundesamt fuer Strahlenschutz, Albert-Schweitzer-Str. 18, 3320 Salzgitter 1 (Germany)
  2. Institut fuer Nukleare Entsorgungstechnik, Kernforschungszentrum Karlsruhe GmbH, Postfach 3640, W-7500 Karlsruhe (Germany)
Publication Date:
OSTI Identifier:
5539167
Resource Type:
Journal Article
Journal Name:
Journal of Materials Research; (United States)
Additional Journal Information:
Journal Volume: 6:12; Journal ID: ISSN 0884-2914
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; LIQUID WASTES; RADIOACTIVE WASTE PROCESSING; PALLADIUM BASE ALLOYS; VITRIFICATION; RHODIUM ALLOYS; RUTHENIUM OXIDES; TELLURIUM ALLOYS; ELECTRIC CONDUCTIVITY; NUCLEAR FUEL RECOVERY AND RECYCLING CENTER; SEDIMENTATION; TERNARY ALLOY SYSTEMS; VISCOSITY; ALLOY SYSTEMS; ALLOYS; CHALCOGENIDES; ELECTRICAL PROPERTIES; FUEL REPROCESSING PLANTS; MANAGEMENT; NUCLEAR FACILITIES; OXIDES; OXYGEN COMPOUNDS; PALLADIUM ALLOYS; PHYSICAL PROPERTIES; PLATINUM METAL ALLOYS; PROCESSING; RADIOACTIVE WASTE MANAGEMENT; REFRACTORY METAL COMPOUNDS; RUTHENIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES; 052001* - Nuclear Fuels- Waste Processing

Citation Formats

Krause, C, and Luckscheiter, B. Properties and behavior of the platinum group metals in the glass resulting from the vitrification of simulated nuclear fuel reprocessing waste. United States: N. p., 1991. Web. doi:10.1557/JMR.1991.2535.
Krause, C, & Luckscheiter, B. Properties and behavior of the platinum group metals in the glass resulting from the vitrification of simulated nuclear fuel reprocessing waste. United States. https://doi.org/10.1557/JMR.1991.2535
Krause, C, and Luckscheiter, B. 1991. "Properties and behavior of the platinum group metals in the glass resulting from the vitrification of simulated nuclear fuel reprocessing waste". United States. https://doi.org/10.1557/JMR.1991.2535.
@article{osti_5539167,
title = {Properties and behavior of the platinum group metals in the glass resulting from the vitrification of simulated nuclear fuel reprocessing waste},
author = {Krause, C and Luckscheiter, B},
abstractNote = {Two types of platinum group metal particles were found in borosilicate nuclear waste glasses: needle-shaped RuO{sub 2} particles and spherical PdRh{sub {ital x}}Te{sub {ital y}} alloys. They form a dense sediment of high electrical conductivity and relatively high viscosity at the bottom of the ceramic melting furnace. The sludge shows a non-Newtonian flow behavior. The viscosity and conductivity of the sludge depend not only on the platinum group metal content but also on the texture and morphology of the RuO{sub 2} particles. RuO{sub 2} forms long, needle-shaped crystals which are caused by alkalimolybdate salt melts that formed in the calcine layer. The salt melts oxidize the Ru present as small RuO{sub 2} particles after calcination to higher oxidation states. Ruthenium (VI) compounds are formed, presumably, which are not stable with respect to RuO{sub 2} under the melting conditions. RuO{sub 2} precipitates and crystallizes into long, needle-like particles.},
doi = {10.1557/JMR.1991.2535},
url = {https://www.osti.gov/biblio/5539167}, journal = {Journal of Materials Research; (United States)},
issn = {0884-2914},
number = ,
volume = 6:12,
place = {United States},
year = {Sun Dec 01 00:00:00 EST 1991},
month = {Sun Dec 01 00:00:00 EST 1991}
}