Physical modeling of core debris: basemat interactions in a MgO-lined LMFBR cavity
The use of a MgO delay bed as a sacrificial material to accommodate core debris within the reactor cavity following a major core disruptive accident involving reactor vessel and guard vessel failure has been considered as one of the likely core retention concepts in LMFBR safety studies. The primary objective of this concept is to prevent direct contact of sodium with concrete so as to minimize the sodium-concrete interactions which result in gas evolution from the concrete structure and the chemical energy release. Another important objective is to provide an effective means of decay heat removal utilizing the large thermal mass of the MgO bed. Characterization has been made of the nature of phenomena involved in the interactions and the potential sequence of their occurrence. A flow diagram for accident progression has been constructed to describe the likely events that may take place in the cavity. The transport rate and mechanism as well as the time scale of each event have been determined by a scoping analysis.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 5912411
- Report Number(s):
- CONF-831047-29; ON: DE83014677
- Resource Relation:
- Conference: American Nuclear Society winter meeting, San Francisco, CA, USA, 30 Oct 1983
- Country of Publication:
- United States
- Language:
- English
Similar Records
Experimental investigations of long-term interactions of molten UO/sub 2/ with MgO and concrete at Argonne National Laboratory. [LMFBR]
Core debris behavior and interactions with concrete
Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
CORE CATCHERS
THERMAL STRESSES
LMFBR TYPE REACTORS
MELTDOWN
HEAT TRANSFER
HYDRAULICS
AFTER-HEAT
CORIUM
MAGNESIUM OXIDES
REACTOR CORES
REACTOR SAFETY
ACCIDENTS
ALKALINE EARTH METAL COMPOUNDS
BREEDER REACTORS
CHALCOGENIDES
ENERGY TRANSFER
EPITHERMAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
FLUID MECHANICS
LIQUID METAL COOLED REACTORS
MAGNESIUM COMPOUNDS
MECHANICS
OXIDES
OXYGEN COMPOUNDS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTORS
SAFETY
STRESSES
220900* - Nuclear Reactor Technology- Reactor Safety
210500 - Power Reactors
Breeding