Internal fuel motion in annular fuel as an inherent safety shutdown mechanism during hypothetical LMFBR accidents
It has been postulated that the use of annular fuel would provide an inherent safety shutdown mechanism during hypothetical LMFBR accidents by providing a pathway for molten fuel to be ejected from the active core region to the fission gas plenum. In this paper, a preliminary assessment of the whole-core reactivity consequences of internal fuel motion in annular fuel during hypothetical transient overpower accidents was performed using the MELT-IIIB/FUMO-E code. It was concluded that internal fuel relocation is an effective inherent safety shutdown mechanism for high reactivity ramp rates on the order of 3$/s. Improvement of the transient fission gas release modeling might expand the range of effectivenwss to substantially lower reactivity ramp rates.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (USA)
- DOE Contract Number:
- AC06-76FF02170
- OSTI ID:
- 5114965
- Report Number(s):
- HEDL-SA-2606-FP; CONF-820704-24; ON: DE82020513
- Resource Relation:
- Conference: International topical meeting on LMFBR safety, Lyon, France, 18 Jul 1982; Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
FUEL ELEMENT FAILURE
LMFBR TYPE REACTORS
MELTDOWN
TRANSIENT OVERPOWER ACCIDENTS
REACTIVITY WORTHS
REACTOR SHUTDOWN
ANNULAR FUEL ELEMENTS
COMPUTER CALCULATIONS
CORIUM
LIQUID FLOW
REACTOR KINETICS
REACTOR SAFETY
ACCIDENTS
BREEDER REACTORS
EPITHERMAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
FLUID FLOW
FUEL ELEMENTS
KINETICS
LIQUID METAL COOLED REACTORS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTORS
SAFETY
SHUTDOWNS
220900* - Nuclear Reactor Technology- Reactor Safety
210500 - Power Reactors
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