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Confinement of ruthenium oxides volatilized during nuclear fuels reprocessing

Journal Article · · Nucl. Technol.; (United States)
OSTI ID:5401705
;
While many materials have been suggested and employed as trapping agents for gaseous oxides of fission product ruthenium volatilized during nuclear fuels reprocessing, none that is known to form thermodynamically stable compounds with rutheniunm has been utilized. We have employed alkaline earth metal compounds for this purpose because of their ability to form stable mixed metal oxide phases with ruthenium. Results of experiments in which RuO/sub 4/ was volatilized from either a solid source (RuO/sub 2/.xH/sub 2/O) or from solution (Ru(NO)(NO/sub 3/)/sub 3/) in HNO/sub 3/ and passed through beds of alkaline earth metal carbonates and calcium oxide held at 600 to 750/sup 0/C have demonstrated that compounds of formulation MRuO/sub 3/ (M = calcium, strontium, barium) are formed. Under oxidizing conditions, these materials exist as stable ceramic phases, whereas under reducing conditions, they are transformed into intimate mixtures of the alkaline earth metal oxide and nonvolatile ruthenium metal.
Research Organization:
Exxon Research and Engineering Co., Linden, NJ
OSTI ID:
5401705
Journal Information:
Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 47:3; ISSN NUTYB
Country of Publication:
United States
Language:
English

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Related Subjects

050800 -- Nuclear Fuels-- Spent Fuels Reprocessing
052001* -- Nuclear Fuels-- Waste Processing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ALKALINE EARTH METAL COMPOUNDS
BARIUM CARBONATES
BARIUM COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
ENERGY SOURCES
EVAPORATION
FISSION PRODUCTS
FUELS
ISOTOPES
MATERIALS
NUCLEAR FUELS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RADIOACTIVE MATERIALS
REACTOR MATERIALS
REPROCESSING
RUTHENIUM COMPOUNDS
RUTHENIUM OXIDES
SEPARATION PROCESSES
SPENT FUELS
STRONTIUM CARBONATES
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRAPPING