The paper presents the results obtained by the CONSEN computer program for two post-test calculations of the EVITA facility (CEA) relating to the cryogenic experiments carried out in 2004 and 2005. EVITA experiment has the scope to test the cryogenic effects in case of water or steam inlet together with helium gas in volumes having initial vacuum conditions. It simulates the cryostat behaviour in the ITER plant during a loss of coolant accident due to the simultaneous ruptures of water and helium cooling pipes. The ice formation phenomenon is investigated. In the past years, several pre- and post- test analyses were carried out. A new model to evaluate ice porosity during formation and its influence on density and thermal conductivity has been implemented and is under testing in CONSEN 5.1. Some modifications in the iterative algorithms for the ice thickness evaluation and corrections have been introduced with respect to the previous CONSEN version. The comparison with the experimental data has been performed and the main agreement and differences remarked. The new version 5.1 of the CONSEN code has now been implemented to carry on post-test calculations, with satisfactory results.
Simulation of cryogenic tests with steam or water and incondensable gas injection in vessels / Caruso, Gianfranco; Cumo, Maurizio Luigi; Porfiri, M. T.. - STAMPA. - (2006), pp. 295-300.
Simulation of cryogenic tests with steam or water and incondensable gas injection in vessels
CARUSO, Gianfranco;CUMO, Maurizio Luigi;
2006
Abstract
The paper presents the results obtained by the CONSEN computer program for two post-test calculations of the EVITA facility (CEA) relating to the cryogenic experiments carried out in 2004 and 2005. EVITA experiment has the scope to test the cryogenic effects in case of water or steam inlet together with helium gas in volumes having initial vacuum conditions. It simulates the cryostat behaviour in the ITER plant during a loss of coolant accident due to the simultaneous ruptures of water and helium cooling pipes. The ice formation phenomenon is investigated. In the past years, several pre- and post- test analyses were carried out. A new model to evaluate ice porosity during formation and its influence on density and thermal conductivity has been implemented and is under testing in CONSEN 5.1. Some modifications in the iterative algorithms for the ice thickness evaluation and corrections have been introduced with respect to the previous CONSEN version. The comparison with the experimental data has been performed and the main agreement and differences remarked. The new version 5.1 of the CONSEN code has now been implemented to carry on post-test calculations, with satisfactory results.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.