Internal pressurization in solid mixed-oxide fuel due to transient fission gas release. [LMFBR]
A model employing Darcy's law has been developed to describe the transient pressure field within interconnected porosity of mixed-oxide liquid-metal fast breeder reactor fuel during hypothetical reactor accidents. Pressure increases are due both to fission gas released from fuel grains and fill gas originally present within fuel pores. Calculations utilizing the model have been performed for an out-of-pile test prior to fuel melting with both clad and unclad conditions being treated. Redistribution of gas from the source region in the relatively high-porosity unrestructured fuel to a low-porosity restructured fuel was shown to exist in all cases considered. Even for the unclad case, significant internal pressurization was predicted by the model, which could prove important in subsequent fuel breakup and motion.
- Research Organization:
- Argonne National Lab., IL
- OSTI ID:
- 5262103
- Journal Information:
- Nucl. Sci. Eng.; (United States), Vol. 64:3
- Country of Publication:
- United States
- Language:
- English
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FISSION PRODUCT RELEASE
LMFBR TYPE REACTORS
REACTOR CORE DISRUPTION
PLUTONIUM DIOXIDE
PRESSURE GRADIENTS
REACTOR SAFETY
URANIUM DIOXIDE
ACCIDENTS
ACTINIDE COMPOUNDS
BREEDER REACTORS
CHALCOGENIDES
EPITHERMAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
LIQUID METAL COOLED REACTORS
OXIDES
OXYGEN COMPOUNDS
PLUTONIUM COMPOUNDS
PLUTONIUM OXIDES
REACTOR ACCIDENTS
REACTORS
SAFETY
TRANSURANIUM COMPOUNDS
URANIUM COMPOUNDS
URANIUM OXIDES
220900* - Nuclear Reactor Technology- Reactor Safety
210500 - Power Reactors
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