This paper deals with the Cathare2 analysis of SBLOCA transient, counterpart of the LOBI facility experiment, that has been performed in the Integral Test Facility (ITF) PSB-VVER, installed at EREC (Electrogorsk, Russia), in the framework of the OECD PSB-VVER Project. This effort has been performed in the framework of a larger objective: the creation of the database of error specific for the Cathare2 code, suitable for application to DBA and BDBA conditions (including AM scenarios) as needed for the licensing process. The calculation has been performed using Cathare2V1.5B computer code and its accuracy has been demonstrated by qualitative and quantitative evaluation reported in the present document. The quantitative analysis has been performed adopting a method developed at DIMNP, which has capabilities in quantifying the errors in code predictions related to the measured experimental signal; the Fast Fourier Transform (FFT) is used aiming to have an integral representation of the code calculation discrepancies (i.e. error between measured and calculated time trends) in the frequency domain. Sensitivity analyses have been addressed to evaluate the influence of the heat losses upon the predicted transient evolution. Finally a comparison with previous Relap5/Mod3.3 code application to the same test are also included.
Analysis of SBLOCA – counterpart test – in PSB-VVER facility by Cathare2: quantitative / qualitative accuracy evaluation and comparison with Relap5 code
D'AURIA, FRANCESCO SAVERIO;
2005-01-01
Abstract
This paper deals with the Cathare2 analysis of SBLOCA transient, counterpart of the LOBI facility experiment, that has been performed in the Integral Test Facility (ITF) PSB-VVER, installed at EREC (Electrogorsk, Russia), in the framework of the OECD PSB-VVER Project. This effort has been performed in the framework of a larger objective: the creation of the database of error specific for the Cathare2 code, suitable for application to DBA and BDBA conditions (including AM scenarios) as needed for the licensing process. The calculation has been performed using Cathare2V1.5B computer code and its accuracy has been demonstrated by qualitative and quantitative evaluation reported in the present document. The quantitative analysis has been performed adopting a method developed at DIMNP, which has capabilities in quantifying the errors in code predictions related to the measured experimental signal; the Fast Fourier Transform (FFT) is used aiming to have an integral representation of the code calculation discrepancies (i.e. error between measured and calculated time trends) in the frequency domain. Sensitivity analyses have been addressed to evaluate the influence of the heat losses upon the predicted transient evolution. Finally a comparison with previous Relap5/Mod3.3 code application to the same test are also included.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
