Thermal properties evaluation of insulation in overpack containers for UF/sub 6/ transport
Two types of insulation are currently in use in overpacks utilized to protect UF/sub 6/ during transport. Phenolic foam has been used in the family of UF/sub 6/ overpacks under US Department of Transportation Specifications. Recently new generation overpacks have been developed which utilize polyurethane foam. A comparative analysis was made of the thermal characteristics of the phenolic foam with that of polyurethane in two different densities. Thermal properties of materials vary with temperature with the relationship being a complex interaction of basic materials properties, processing variables, and environmental conditions. The need to incorporate temperature dependent thermal properties into analytical finite element codes led to an experimental program to measure thermal properties, principally thermal conductivity, for the 21PF-1 overpack phenolic foam. The thermal conductivity-temperature relationship for this insulator has been measured from room temperature to over 1000F. An alternate UF/sub 6/ product cylinder overpack container has recently entered service; an overpack design incorporating polyurethane as the primary thermal resistance in place of the phenolic foam in a 2 1/2 ton cylinder overpack. Elevated temperature thermal properties measurements for the polyurethane material system are presented.
- Research Organization:
- Oak Ridge Gaseous Diffusion Plant, TN (USA)
- DOE Contract Number:
- AC05-84OT21400
- OSTI ID:
- 6368656
- Report Number(s):
- K/QT-301; CONF-890631-39; ON: DE89013522
- Country of Publication:
- United States
- Language:
- English
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ACTINIDE COMPOUNDS
COLLOIDS
DISPERSIONS
FLUORIDES
FLUORINE COMPOUNDS
FOAMS
HALIDES
HALOGEN COMPOUNDS
PHYSICAL PROPERTIES
THERMAL ANALYSIS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
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URANIUM COMPOUNDS
URANIUM FLUORIDES
URANIUM HEXAFLUORIDE