TMI-2 criticality studies: lower-vessel rubble and analytical benchmarking
A bounding strategy has been adopted for assuring subcriticality during all TMI-2 defueling operations. The strategy is based upon establishing a safe soluble boron level for the entire reactor core in an optimum reactivity configuration. This paper presents the determination of a fuel rubble model which yields a maximum infinite lattice multiplication factor and the subsequent application of cell-averaged constants in finite system analyses. Included in the analyses are the effects of fuel burnup determined from a simplified power history of the reactor. A discussion of the analytical methods employed and the determination of an analytical bias with benchmark crictical experiments completes the presentation. 17 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6310430
- Report Number(s):
- ORNL/CSD/TM-222; ON: DE86004639
- Country of Publication:
- United States
- Language:
- English
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210200* -- Power Reactors
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Light-Water Moderated
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210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
BURNUP
CONTAINERS
CORIUM
CRITICALITY
ENERGY SOURCES
ENRICHED URANIUM REACTORS
FUELS
MATERIALS
NUCLEAR FUELS
POWER REACTORS
PWR TYPE REACTORS
REACTOR COMPONENTS
REACTOR CORES
REACTOR MATERIALS
REACTOR VESSELS
REACTORS
SIMULATION
THERMAL REACTORS
THREE MILE ISLAND-2 REACTOR
WATER COOLED REACTORS
WATER MODERATED REACTORS