This paper deals with the assessment of the latest version V1.4 of CATHARE 2, the thermal-hydraulic French system code, in an accident scenario characterized by low pressure and power. Such scenario is provided by a loss of Residual Heat Removal System (RHRS) test conducted in the BETHSY facility, which has already been the subject of the International Standard Problem 38 (ISP38). ENEA's participation in the open exercise ISP38 with the version V1.3 of CATHARE has made the comparison of the post-test results possible with the results of the previous code version. The result of the post-test analysis appears quite good, thus demonstrating the code is able to describe the most important phenomena characterizing the test quite correctly. Concerning the comparison with the previous CATHARE version some discrepancies about the distribution of mass inventory are overcome, while the difficulty in simulating the entrainment and temporary retention of water in the pressurizer and surge line is not completely solved.

Benchmark Assessment of Cathare 2 V1.4 on a Loss of Residual Heat Removal System Test Conducted in Bethsy Facility

Meloni, P.
1999

Abstract

This paper deals with the assessment of the latest version V1.4 of CATHARE 2, the thermal-hydraulic French system code, in an accident scenario characterized by low pressure and power. Such scenario is provided by a loss of Residual Heat Removal System (RHRS) test conducted in the BETHSY facility, which has already been the subject of the International Standard Problem 38 (ISP38). ENEA's participation in the open exercise ISP38 with the version V1.3 of CATHARE has made the comparison of the post-test results possible with the results of the previous code version. The result of the post-test analysis appears quite good, thus demonstrating the code is able to describe the most important phenomena characterizing the test quite correctly. Concerning the comparison with the previous CATHARE version some discrepancies about the distribution of mass inventory are overcome, while the difficulty in simulating the entrainment and temporary retention of water in the pressurizer and surge line is not completely solved.
Analisi sistemi e di sicurezza
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12079/3602
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