Solidification of a sphere with internal heat generation and convective cooling at the surface. [LMFBR]

Journal Article · Fri Jul 01 04:00:00 EDT 1977 · Nucl. Sci. Eng.; (United States)

OSTI ID:7317589

Dhir, V K; Wong, K; Kastenberg, W E

One-dimensional, nonhomogeneous transient conduction equations in both liquid and solid regions of a volumetrically heated sphere subjected to arbitrary time-independent convective cooling condition at the surface are numerically integrated. The results of numerical integration show that, depending on the relative magnitudes of the volumetric heat generation rate and the surface heat removal rate, the initially molten particle may completely solidify, temporarily solidify and then completely remelt, or have a solid outer crust with an inner molten core. The times needed to attain these quasi-stable states and the solidification and remelting rates prior to attaining these physical states are also computed.

• Research Organization: Univ. of California, Los Angeles
• OSTI ID: 7317589
• Journal Information: Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 63:3; ISSN NSENA
• Country of Publication: United States
• Language: English

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ACCIDENTS
ACTINIDE COMPOUNDS
AFTER-HEAT REMOVAL
ALKALI METALS
BREEDER REACTORS
CHALCOGENIDES
ELEMENTS
ENERGY TRANSFER
EPITHERMAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
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LIQUID METAL COOLED REACTORS
LMFBR TYPE REACTORS
MELTDOWN
METALS
OXIDES
OXYGEN COMPOUNDS
REACTOR ACCIDENTS
REACTORS
REMOVAL
SODIUM
SPHERES
URANIUM COMPOUNDS
URANIUM DIOXIDE
URANIUM OXIDES