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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

CAPABILITIES OF SYSTEM CODES IN SIMULATING CONDENSATION

Get access (open in a dialog) DOI: 10.1615/IHTC10.2480
pages 143-148

Résumé

This paper deals with the evaluation of the capabilities of the thermalhydraulic codes in simulating the heat removal and heat transfer degradation during the condensation process including the presence of nitrogen in an isolation condenser system. The isolation condenser is a passive cooling device adopted in the simplified boiling water reactor.
The experimental data are drawn from tests performed in an experimental apparatus, named Giraffe, property of Toshiba Corporation. In some of the tests incondensable gases have been used to study the influence on the condensation process.
Relap5/mod2, Relap5/mod3, Cathare 2 VI.2E, Cathare 2 VI.3 and a version of Cathare 2 VI.3 with an improved film condensation model have been applied to the analysis of the tests.
Both standard versions of Cathare have shown to underestimate the heat transfer, while Relap5/mod2, Relap5/mod3 and the modified version of Cathare 2 VI.3 gave better results. These codes have also shown better capabilities in the predicting the heat transfer degradation due to the presence of incondensable gases.