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KATS experiments to simulate corium spreading in the EPR core catcher concept = : KATS-Experimente zur Simulierung der Kernschmelzen-Ausbreitung im EPR-Kernschmelzen-Auffang-Konzept

In future Light Water Reactors special devices (core catchers) might be required to prevent containment failure by basement erosion after reactor pressure vessel meltthrough during a core meltdown accident. Quick freezing of the molten core masses is desirable to reduce release of radioactivity. In... 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. 148-155
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ISSN: 0947-8620
Additional Keywords: ALUMINIUMOXID
AUSBREITUNG
DRUCKWASSERREAKTOR
DURCHGEHEN
EISEN
GROESSTER-ANZUNEHMENDER-UNFALL
KERNENERGIE
KERNKRAFTWERK
KERNSCHMELZE
KUEHLUNG
SCHMELZE
SICHERHEITSTECHNIK
SUBSTRAT
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 8 Seiten, 5 Bilder, 5 Quellen
PPN (Catalogue-ID): WTI037808567
Note: WTI TEMA DB
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Internes Format
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245 0 0 |a KATS experiments to simulate corium spreading in the EPR core catcher concept =  |b KATS-Experimente zur Simulierung der Kernschmelzen-Ausbreitung im EPR-Kernschmelzen-Auffang-Konzept 
300 |a 8 Seiten, 5 Bilder, 5 Quellen 
500 |a Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG 
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520 |a In future Light Water Reactors special devices (core catchers) might be required to prevent containment failure by basement erosion after reactor pressure vessel meltthrough during a core meltdown accident. Quick freezing of the molten core masses is desirable to reduce release of radioactivity. In the case of a postulated core melt down accident in the EPR (European Pressurized Water Reactor) the ex-vessel melt shall be retained and cooled in a special compartment inside the containment to exclude significant radioactive release to the environment. After penetration of the lower head of the RPV the melt will first be collected in the reactor cavity and will interact with sacrifical materials. After melt-through of the steel gate the melt is released into the core catcher compartment where it will be flooded by water to extract the decay heat and solidify the melt pool. Therefore the sufficiently homogeneous melt spreading is important to ensure a large-surface and low-thickness melt distribution. KATS is an experimental programme performed at FZK to investigate the basic factors of the spreading process by use of substitute materials for the corium melt. A series of experiments has been carried out to investigate high temperature melt spreading into 1-dim channels and on 2-dim flat surfaces using alumina-iron thermite melts as a simulant. The oxidic and metallic phases of the melt are separated and spread on different surfaces. The puring rates and melt temperatures have been varied; furthermore, different substrates have been studied (dry, inert ceramics, silicate concrete, epoxy-coated silicate concrete). Finally, the influence of a shallow water layer on the surfaces onto the spreading behaviour has also been studied. 
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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 
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773 0 8 |i In  |t Forschungs-Zentrum Karlsruhe, Wissenschaftliche Berichte, Technik und Umwelt  |g Vol. 6475 (2000), p. 148-155  |q 6475<148-155  |x 0947-8620  |x 0947-8620 
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