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. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6310430
- Report Number(s):
- ORNL/CSD/TM-222; ON: DE86004639
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted. Includes 36 sheets of 48x reduction microfiche
- Country of Publication:
- United States
- Language:
- English
Similar Records
Criticality Analyses for TMI-2 Defueling
Review of the State of Criticality of the Three Mile Island Unit 2 Core and Reactor Vessel
Related Subjects
THREE MILE ISLAND-2 REACTOR
CRITICALITY
REACTOR CORES
BURNUP
CORIUM
NUCLEAR FUELS
REACTOR VESSELS
SIMULATION
CONTAINERS
ENERGY SOURCES
ENRICHED URANIUM REACTORS
FUELS
MATERIALS
POWER REACTORS
PWR TYPE REACTORS
REACTOR COMPONENTS
REACTOR MATERIALS
REACTORS
THERMAL REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled