Internal fuel motion in annular fuel for 50 cents/s and 10 cents/s transient overpower accidents
It has been postulated that the use of annular fuel provides 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. Although this mechanism has been demonstrated to be effective for rapid overpower transients, previous work has been unable to demonstrate the viability of the mechanism for slower ramp rate cases in the range of 10 to 50 cents/s. An axial blanket internal hole size design variation (DP-1) significantly improved the viability of internal fuel motion to act as an inherent safety shutdown mechanism for high ramp rate cases on the order of 2 to 3$/s. However, when evaluated for a 50 cents/s TOP case, this design variation did not prove viable. A further design variation (DP-2) reported proved viable for a 50 cents/s TOP case. Case DP-3, a limiting variation, proved viable for a 10 cents/s TOP case. The basic fuel pin design used dual fission gas plena. The base case assumed a 50 cents/s TOP accident with a 3$ reactivity insertion for a 2550 MWt Large Development Plant (LDP) heterogeneous core design. All cases were analyzed using the coupled MELT-IIIB/FUMO-E code.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (USA)
- DOE Contract Number:
- AC06-76FF02170
- OSTI ID:
- 6122893
- Report Number(s):
- HEDL-SA-3209-FP; CONF-850410-8; ON: DE85001066; TRN: 85-007445
- Resource Relation:
- Conference: ANS/ENS fast reactor safety meeting, Knoxville, TN, USA, 21 Apr 1985; Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
LMFBR TYPE REACTORS
TRANSIENT OVERPOWER ACCIDENTS
ANNULAR FUEL ELEMENTS
FLOW BLOCKAGE
FUEL PINS
REACTIVITY
ACCIDENTS
BREEDER REACTORS
EPITHERMAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
FUEL ELEMENTS
LIQUID METAL COOLED REACTORS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTORS
220900* - Nuclear Reactor Technology- Reactor Safety
210500 - Power Reactors
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