Sodium zirconium phosphate (NZP) as a host structure for nuclear waste immobilization: A review

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Waste Management; (United States)

DOI:https://doi.org/10.1016/0956-053X(94)90133-3· OSTI ID:6843747

Scheetz, B E; Agrawal, D K; Breval, E; Roy, R ^[1]

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1. Pennsylvania State Univ., University Park, PA (United States)

Sodium zirconium phosphate [NZP] structural family, of which NaZr[sub 2]P[sub 3]O[sub 12] is the parent composition, has been reviewed as a host ceramic waste form for nuclear waste immobilization. NZP compounds are characterized for their ionic conductivity, low thermal expansion and structural flexibility to accommodate a large number of multivalent ions. This latter property of the [NZP] structure allows the incorporation of almost all 42 nuclides present in a typical commercial nuclear waste. The leach studies of simulated waste forms based on NZP have shown reasonable resistance for the release of its constituents. The calculation of dissolution rates of NZP structure has demonstrated that it would take 20,000 times longer to dissolved NZP than quartz.

• OSTI ID: 6843747
• Journal Information: Waste Management; (United States), Journal Name: Waste Management; (United States) Vol. 14:6; ISSN WAMAE2; ISSN 0956-053X
• 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
ALKALI METAL COMPOUNDS
CHEMICAL PROPERTIES
MANAGEMENT
MATERIALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTES
SODIUM COMPOUNDS
SODIUM PHOSPHATES
SOLIDIFICATION
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
ZIRCONIUM COMPOUNDS
ZIRCONIUM PHOSPHATES