An axially heterogeneous core concept for large LMFBRs and its HCDA behavior
Journal Article
·
· Nucl. Technol.; (United States)
OSTI ID:6703575
One type of axially heterogeneous core concept for liquid-metal fast breeder reactors has been developed in which a disk-shaped internal blanket with its thickness radially changed is introduced at the driver core midplane except for a few outside rows of the driver core fuel subassemblies. This core configuration gives a high breeding ratio and short doubling time, as well as flat and stable power distribution throughout the operation. The hypothetical core disruptive accident (HCDA) behavior of this core is considerably mitigated, and the mechanical work energy released in energetic events during the initiating phase of the severest HCDA is a few times less than that of an equivalent conventional two-enrichment-zone homogeneous core. This effect is attributed to a smaller sodium-void reactivity worth around the core center and an axially flattened fuel worth distribution in the presented heterogeneous core.
- Research Organization:
- Energy Research Laboratory, Hitachi Ltd., Hitachi-shi,
- OSTI ID:
- 6703575
- Journal Information:
- Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 63:2; ISSN NUTYB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
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CIRCULAR CONFIGURATION
COMPARATIVE EVALUATIONS
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CONVERSION RATIO
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FAST REACTORS
FBR TYPE REACTORS
FUEL ASSEMBLIES
FUEL ELEMENT CLUSTERS
HETEROGENEOUS REACTOR CORES
KINETICS
LIQUID METAL COOLED REACTORS
LMFBR TYPE REACTORS
METALS
POWER DISTRIBUTION
REACTIVITY COEFFICIENTS
REACTIVITY WORTHS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR CORE DISRUPTION
REACTOR CORES
REACTOR KINETICS
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