Coupled thermomechanical response of a pressure vessel lower head to relocated corium
Conference
·
OSTI ID:131852
- Univ. of Wisconsin, Madison, WI (United States). Dept. of Nuclear Engineering and Engineering Physics
Previous investigations of the pressure vessel lower head subjected to relocated corium, performed as part of the OECD-sponsored Three Mile Island Unit 2 Vessel Investigation Project (TMI-2 VIP), indicated the vessel would fail under the high pressures and extreme temperatures expected from corium relocation. The TMI-2 lower head, however, remained intact and experienced no finite deformation, despite the settling of some 19 tonnes of previously molten material on top of it. The inconsistency between model predictions and TMI-2 vessel behavior were ascribed to an incomplete understanding of corium interaction with the lower head as well as insufficient coupling between vessel deformation and thermal loading. This paper summarizes results obtained to date and efforts to couple the thermal and mechanical response of the corium, overlaying water pool and vessel lower head.
- OSTI ID:
- 131852
- Report Number(s):
- CONF-950740--; ISBN 0-7918-1334-7
- Country of Publication:
- United States
- Language:
- English
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