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CometPC: first results for a simplified cooling concept based on porous concrete = : CometPC: Erste Ergebnisse für ein vereinfachtes, auf porösem Beton basierendes Kühlungskonzept

In the modified CometPC cooling concept, the water is supplied to the bottom of the melt through a layer of porous concrete which is filled and pressurised with water from an elevated water reservoir. This layer of porous concrete replaces the array of sealed injection tubes which are used in the or... 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. 356-364
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ISSN: 0947-8620
Additional Keywords: BETON
DURCHGEHEN
ERSTARRUNGSGESCHWINDIGKEIT
GROESSTER-ANZUNEHMENDER-UNFALL
KERNENERGIE
KERNKRAFTWERK
KERNREAKTOR
KERNSCHMELZE
POROSITAET
SCHMELZE
SICHERHEITSTECHNIK
WASSERKUEHLUNG
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 9 Seiten, 6 Bilder, 1 Tabelle, 2 Quellen
PPN (Catalogue-ID): WTI03780846X
Note: WTI TEMA DB
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Internes Format
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040 |b ger  |c GBVCP 
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245 0 0 |a CometPC: first results for a simplified cooling concept based on porous concrete =  |b CometPC: Erste Ergebnisse für ein vereinfachtes, auf porösem Beton basierendes Kühlungskonzept 
300 |a 9 Seiten, 6 Bilder, 1 Tabelle, 2 Quellen 
500 |a Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG 
500 |a Copyright: (C) Alle Rechte beim Herausgeber 
520 |a In the modified CometPC cooling concept, the water is supplied to the bottom of the melt through a layer of porous concrete which is filled and pressurised with water from an elevated water reservoir. This layer of porous concrete replaces the array of sealed injection tubes which are used in the original COMET concept. By supply of a certain coolant water flow, a reasonable fragmentation, cooling, and complete solidification of the melt are achieved. Five transient experiments with thermite melts are reported which were used to develop and test the required porous layers. It is found that the cooling process results in similar cooling and solidification rates of the melt as observed in the original concept. The porosity in the solidified melt is sufficiently high to safely maintain the heat removal. The first large scale test with sustained decay heat simulation in the melt resulted in lower, yet still sufficient flooding rates, as the concrete layers were fabricated in a slightly different way, and safe cooling and arrest of the melt were demonstrated over 1.6 hours. The experiments performed so far show that the use of porous concrete layers is an attractive and economic simplification of the bottom flooding cooling concept. Additionally, and increased resistance against downward penetration of the melt even under extreme conditions is expected. Future large scale tests will concentrate on the improvement and proper design of the porous layers to optimise the coolant flow with respect to the desired porosity of the solidified melt and its solidification rate. 
653 4 |a SICHERHEITSTECHNIK 
653 4 |a SCHMELZE 
653 4 |a KERNREAKTOR 
653 4 |a KERNENERGIE 
653 4 |a GROESSTER-ANZUNEHMENDER-UNFALL 
653 4 |a DURCHGEHEN 
653 4 |a KERNKRAFTWERK 
653 4 |a WASSERKUEHLUNG 
653 4 |a ERSTARRUNGSGESCHWINDIGKEIT 
653 4 |a BETON 
653 4 |a POROSITAET 
653 4 |a KERNSCHMELZE 
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. 356-364  |q 6475<356-364  |x 0947-8620  |x 0947-8620 
912 |a GBV_WTI 
950 |a Sicherheitstechnik  |a Schmelze  |a Kernreaktor  |a Kernenergie  |a GAU (größter anzunehmender Unfall)  |a Durchgehen  |a Kernkraftwerk  |a Wasserkühlung  |a Erstarrungsgeschwindigkeit  |a Beton  |a Porosität  |a Kernschmelze  |2 DE-601 
951 |a AR 
952 |d 6475  |j 2000  |h 356-364