Method for primary containment of cesium wastes

Patent · Sat Jan 01 00:00:00 EST 1983

OSTI ID:864516

Angelini, Peter ^[1]; Lackey, Walter J ^[1]; Stinton, David P ^[2]; Blanco, Raymond E ^[1]; Bond, Walter D ^[2]

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1. Oak Ridge, TN
2. Knoxville, TN

A method for producing a cesium-retentive waste form, characterized by a high degree of compositional stability and mechanical integrity, is provided by subjecting a cesium-loaded zeolite to heat under conditions suitable for stabilizing the zeolite and immobilizing the cesium, and coating said zeolite for sufficient duration within a suitable environment with at least one dense layer of pyrolytic carbon to seal therein said cesium to produce a final, cesium-bearing waste form. Typically, the zeolite is stabilized and the cesium immobilized in less than four hours by confinement within an air environment maintained at about 600.degree. C. Coatings are thereafter applied by confining the calcined zeolite within a coating environment comprising inert fluidizing and carbon donor gases maintained at 1,000.degree. C. for a suitable duration.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4376792
• OSTI ID: 864516
• Country of Publication: United States
• Language: English

Related Subjects

method
primary
containment
cesium
wastes
producing
cesium-retentive
waste
form
characterized
degree
compositional
stability
mechanical
integrity
provided
subjecting
cesium-loaded
zeolite
heat
conditions
suitable
stabilizing
immobilizing
coating
sufficient
duration
environment
dense
layer
pyrolytic
carbon
seal
therein
produce
final
cesium-bearing
typically
stabilized
immobilized
hours
confinement
air
maintained
600
coatings
thereafter
applied
confining
calcined
comprising
inert
fluidizing
donor
gases
000
waste form
pyrolytic carbon
mechanical integrity
sufficient duration
thereafter applied
comprising inert
environment comprising
inert fluidizing
/588/210/427/976/