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Corium cooling by bottom flooding: results of the comet investigations = : Kernschmelzenkühlung mittels Wasserflutung von unten: Ergebnisse der COMET-Untersuchungen

The COMET concept of corium cooling serves to stabilise and cool ex-vessel corium melts in the case of core melt accidents. After erosion of a sacrificial concrete layer the melt is passively flooded by bottom injection of coolant water through a multitude of flow channels. The resulting evaporation... Full description

Kongresse: OECD Workshop on Ex-Vessel Debris Coolability 1999 1999.11.15-1999.11.18 Karlsruhe, DE
OECD Workshop on Ex-Vessel Debris Coolability 1999.11.15-1999.11.18 Karlsruhe, DE
Contained in: Forschungs-Zentrum Karlsruhe, Wissenschaftliche Berichte, Technik und Umwelt Vol. 6475 (2000), p. 345-355
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ISSN: 0947-8620
Additional Keywords: ALUMINIUMOXID
DRUCKWASSERREAKTOR
DURCHGEHEN
EISEN
ERSTARRUNGSDAUER
GROESSTER-ANZUNEHMENDER-UNFALL
KERNENERGIE
KERNKRAFTWERK
KERNSCHMELZE
POROSITAET
SCHMELZE
SICHERHEITSTECHNIK
WASSERKUEHLUNG
ZIRKONIUMZUSATZ
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 11 Seiten, 10 Bilder, 4 Quellen
PPN (Catalogue-ID): WTI037808478
Note: WTI TEMA DB
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520 |a The COMET concept of corium cooling serves to stabilise and cool ex-vessel corium melts in the case of core melt accidents. After erosion of a sacrificial concrete layer the melt is passively flooded by bottom injection of coolant water through a multitude of flow channels. The resulting evaporation process creates a porous structure of the melt from which the energy is easily extracted. The porous melt solidifies within one hour typical and is permanently flooded by water. For the investigations of the concept, transient experiments with high temperature thermite melts and with real corium melts are performed. Furthermore, large scale experiments with thermite melts up to 1300 kg and simulation of decay heat are conducted to study the role of inhomogeneous melt attack, the role of metallic Zr, and the influence of the coolant water pressure and melt height on coolability. The experiments show that safe short-term and long-term cooling is achieved when a reasonable pressure of the flooding water exists. 
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711 2 |a OECD Workshop on Ex-Vessel Debris Coolability  |n 1999  |d 1999.11.15-1999.11.18  |c Karlsruhe, DE 
711 2 |a OECD Workshop on Ex-Vessel Debris Coolability  |d 1999.11.15-1999.11.18  |c Karlsruhe, DE 
773 0 8 |i In  |t Forschungs-Zentrum Karlsruhe, Wissenschaftliche Berichte, Technik und Umwelt  |g Vol. 6475 (2000), p. 345-355  |q 6475<345-355  |x 0947-8620  |x 0947-8620 
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