Management options for Fukushima corium
| Autor: | Hideki Kawamura, Ian G. McKinley, S.M.L. Hardie, Steve Lomperski, Tara M. Beattie |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Core cooling
Waste management 020209 energy Energy Engineering and Power Technology 02 engineering and technology Corium Nuclear decommissioning Contaminated water Nuclear Energy and Engineering Containment Criticality 0202 electrical engineering electronic engineering information engineering Environmental science Safety Risk Reliability and Quality Waste Management and Disposal |
| Zdroj: | Progress in Nuclear Energy. 92:260-266 |
| ISSN: | 0149-1970 |
| DOI: | 10.1016/j.pnucene.2015.07.017 |
| Popis: | The loss of core cooling for units 1–3 during the accident at Fukushima Dai-ichi caused major fuel damage. Although full details are not yet available, fuel melting produced corium within the reactor pressure vessels that has, to an unknown degree, melted through into the primary containment. The present priority is cooling the damaged reactors and managing contaminated water, but planning of longer term decommissioning has already begun. Management of highly damaged fuel and corium will be of primary concern, with the main options being recovery for reprocessing or packaging for direct disposal. Although the latter option may have significant cost advantages, it presents some novel safety challenges for both operational and post-closure phases. Concerns include criticality management and modelling of long-term dissolution of materials having highly variable composition. Further R&D is required to fill knowledge gaps – of which the most sensitive may involve determination of the extent to which small “hot particles” of corium have been produced. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect