The Ceramic Waste Form Process at Idaho National Laboratory

Conference · Tue May 01 00:00:00 EDT 2007

OSTI ID:918171

Priebe, Stephen

The treatment of spent nuclear fuel for disposition using an electrometallurgical technique results in two high-level waste forms: a ceramic waste form (CWF) and a metal waste form. Reactive metal fuel constituents, including all the transuranic metals and the majority of the fission products remain in the salt as chlorides and are processed into the CWF. The solidified salt is containerized and transferred to the CWF process where it is ground in an argon atmosphere. Zeolite 4A is ground and then dried in a mechanically-fluidized dryer. The salt and zeolite are mixed in a V-mixer and heated to 500°C to occlude the salt into the structure of the zeolite. The salt-loaded zeolite is cooled, mixed with borosilicate glass frit, and transferred to a crucible, which is placed in a furnace and heated to 925°C. During this process, known as pressureless consolidation, the zeolite is converted to the final sodalite form and the glass thoroughly encapsulates the sodalite, producing a dense, leach-resistant final waste form.

• Research Organization: Idaho National Laboratory (INL)
• Sponsoring Organization: DOE - NE
• DOE Contract Number: AC07-99ID13727
• OSTI ID: 918171
• Report Number(s): INL/CON-07-12580
• Conference Information: International Conference on Incineration and Thermal Treatment Technologies,Phoenix, AZ,05/14/2007,05/19/2007
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ARGON
BOROSILICATE GLASS
ceramic waste form
CERAMICS
CHLORIDES
COMBUSTION
FISSION PRODUCTS
FURNACES
GLASS
IDAHO
NUCLEAR FUELS
pyroprocessing
WASTE FORMS
ZEOLITES