Examination of relocated fuel debris adjacent to the lower head of the TMI-2 reactor vessel
- EG and G Idaho, Inc., Idaho Falls, ID (United States)
As part of the Three Mile Island Unit 2 (TMI-2) Vessel Investigation Project, funded by the Organization for Economic Cooperation and Development, physical, metallurgical, and radiochemical examinations were performed on samples of previously molten material that had relocated to the lower plenum of the TMI-2 reactor during the accident of 28 March 1979. This report presents the results of those examinations and some limited analysis of these results as required for the interpretation of the data. Principal conclusions of the examinations are that the bulk lower head debris is homogeneous and composed primarily of (U,Zr)O{sub 2}. This molten material reached temperatures greater than 2,600 C and probably reached the lower head as a liquid or slurry at temperatures below the peak temperature. A debris bed was formed, which was composed of particular debris above a monolithic melt that solidified on the lower head.
- Research Organization:
- Nuclear Regulatory Commission, Washington, DC (United States). Div. of Systems Research; EG and G Idaho, Inc., Idaho Falls, ID (United States)
- Sponsoring Organization:
- Nuclear Regulatory Commission, Washington, DC (United States)
- DOE Contract Number:
- AC07-76ID01570
- OSTI ID:
- 10140801
- Report Number(s):
- NUREG/CR-6195; EGG-2732; ON: TI94009590; IN: TMI V(92)EG10; TRN: 94:007558
- Resource Relation:
- Other Information: PBD: Mar 1994
- Country of Publication:
- United States
- Language:
- English
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21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
THREE MILE ISLAND-2 REACTOR
CORIUM
CHEMICAL COMPOSITION
REACTOR ACCIDENTS
SAMPLING
METALLURGY
SCANNING ELECTRON MICROSCOPY
RADIOCHEMICAL ANALYSIS
METALLOGRAPHY
MICROSTRUCTURE
URANIUM OXIDES
THORIUM OXIDES
DENSITY
EXPERIMENTAL DATA
220900
210200
REACTOR SAFETY
POWER REACTORS
NONBREEDING
LIGHT-WATER MODERATED
NONBOILING WATER COOLED