Neptunium doping of the crystalline ceramic waste form synroc B

Journal Article · Sun May 01 00:00:00 EDT 1988 · Advanced Ceramic Materials; (USA)

DOI:https://doi.org/10.1111/j.1551-2916.1988.tb00219.x· OSTI ID:5963822

Matzke, H; Toscano, E; Walker, C T ^[1]; Solomah, A G ^[2]

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1. European Institute for Transuranium Elements, Karlsruhe (West Germany)
2. Kernforschungsanlage KFA-Juelich (West Germany)

The crystalline ceramic waste form synroc B was produced with a nominal loading of 10 wt% NpO{sub 2} by soaking green pellets with Np solution followed by sintering in reducing atmosphere (Ar/8% H{sub 2}). Electron microprobe analysis showed that Np was partitioned between the zirconolite (10.7 wt% Np) and perovskite phases (9.5 wt%), whereas the remaining two phases of hollandite and rutile contained {le} 0.2 wt% Np. The partitioning of Np was not significantly changed by an oxidizing anneal. Leach tests (190{degree}C, 7d, deionized water) showed the leach rate for Np to be <5 {times} 10{sup {minus}3} g/(m{sup 2}{center dot}d).

• OSTI ID: 5963822
• Journal Information: Advanced Ceramic Materials; (USA), Journal Name: Advanced Ceramic Materials; (USA) Vol. 3:3; ISSN ACEME; ISSN 0883-5551
• Country of Publication: United States
• Language: English

Related Subjects

052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACTINIDE COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
DATA
DISSOLUTION
ELECTRON MICROPROBE ANALYSIS
EXPERIMENTAL DATA
HIGH-LEVEL RADIOACTIVE WASTES
HOLLANDITE
INFORMATION
IRON COMPOUNDS
IRON OXIDES
LEACHING
MANAGEMENT
MATERIALS
MICROANALYSIS
MINERALS
NEPTUNIUM COMPOUNDS
NEPTUNIUM OXIDES
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITE
PEROVSKITES
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTES
RUTILE
SEPARATION PROCESSES
SYNROC PROCESS
THORIUM COMPOUNDS
THORIUM OXIDES
TITANI
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSURANIUM COMPOUNDS
VITRIFICATION
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
ZIRCONOLITE