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Forschungszentrum Karlsruhein der Helmholtz-Gemeinschaft
Forschungszentrum Karlsruhein der Helmholtz-Gemeinschaft
Programme Nuclear Safety Research (NUKLEAR)
Safety of Nuclear Reactors: Study and evaluation of existing nuclear reactors with respect to
• Design basis accidents and severe accident phenomena • Analysis of accident sequences • Radiological consequences
on the basis of advanced R&D work
Safety of Nuclear Waste Disposal: Study and examination of concepts of
• Characterization and immobilization of nuclear waste • Reduction of radiotoxicity (including P&T) • Safety barriers for repositories • Radiation research
to guarantee the long-term safety of nuclear waste disposal
Maintenance of Competence and Education 11th QUENCH Workshop, Forschungszentrum Karlsruhe, 25-27. 10. 2005
Forschungszentrum Karlsruhein der Helmholtz-Gemeinschaft
Safety Research for Nuclear Reactors Investigations on severe accident phenomena
QUENCH: Investigations on fuel rods during reflood
LIVE: Phenomena of core melting and in-vessel corium relocation
DISCO: Molten corium dispersion
COMET: Molten corium concrete interaction and coolability
Hydrogen: Behaviour of hydrogen in the reactor system
Increased safety requests for future nuclear technology, e.g. Generation IV nuclear energy systems• operations will excel in safety and reliability. • will have very low likelihood and degree of reactor core damage. • will eliminate the need for offsite emergency response.
Next generation nuclear reactors
Forschungszentrum Karlsruhein der Helmholtz-Gemeinschaft
National and international projects – e.g. OECD-MCCI -
could not demonstrate melt coolability outside the RPV.
„The case of basemat penetration“
Therefore, in future reactors core catcher would be needed, e.g. COMET or melt retention, cooling, stabilisation is to be demonstrated within RPV
Second option needs better understanding of late core degradation phenomena, evaluation of coolability of partly degraded cores modeling of related phenomena for PSA
Experimental basis projects like QUENCH, LIVE
Forschungszentrum Karlsruhein der Helmholtz-Gemeinschaft