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RISS 인기검색어
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- 저자 : MARCO CHERUBINI (검색결과 3 건)
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INTERNATIONAL STANDARD PROBLEM 50: THE UNIVERSITY OF PISA CONTRIBUTION
MARCO CHERUBINI,DAVIDE LAZZERINI,WALTER GIANNOTTI,FRANCESCO D’AURIA 한국원자력학회 2012 Nuclear Engineering and Technology Vol.44 No.6
The present paper deals with the participation of the University of Pisa in the last International Standard Problem (ISP)focused on system thermal hydraulic, which was led by the Korean Atomic Energy Research Institution (KAERI). The selected test was a Direct Vessel Injection (DVI) line break carried out at the ATLAS facility. University of Pisa participated, together with other eighteen institutions, in both blind and open phase of the analytical exercise pursuing its methodology for developing and qualifying a nodalization. Qualitative and quantitative analysis of the code results have been performed for both ISP-50phases, the latter adopting the Fast Fourier Transfer Based Method (FFTBM). The experiment has been characterized by threedimensional behavior in downcomer and core region. Even though an attempt to reproduce these phenomena, by developing a fictitious three-dimensional nodalization has been realized, the obtained results were generally acceptable but not fully satisfactory in replicating 3D behavior.
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INTERNATIONAL STANDARD PROBLEM 50: THE UNIVERSITY OF PISA CONTRIBUTION
Cherubini, Marco,Lazzerini, Davide,Giannotti, Walter,D'auria, Francesco Korean Nuclear Society 2012 Nuclear Engineering and Technology Vol.44 No.6
The present paper deals with the participation of the University of Pisa in the last International Standard Problem (ISP) focused on system thermal hydraulic, which was led by the Korean Atomic Energy Research Institution (KAERI). The selected test was a Direct Vessel Injection (DVI) line break carried out at the ATLAS facility. University of Pisa participated, together with other eighteen institutions, in both blind and open phase of the analytical exercise pursuing its methodology for developing and qualifying a nodalization. Qualitative and quantitative analysis of the code results have been performed for both ISP-50 phases, the latter adopting the Fast Fourier Transfer Based Method (FFTBM). The experiment has been characterized by three-dimensional behavior in downcomer and core region. Even though an attempt to reproduce these phenomena, by developing a fictitious three-dimensional nodalization has been realized, the obtained results were generally acceptable but not fully satisfactory in replicating 3D behavior.
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Olivier Marchand,Jinzhao Zhang,Marco Cherubini 한국원자력학회 2018 Nuclear Engineering and Technology Vol.50 No.2
In the framework of OECD/NEA Working Group on Fuel Safety, a RIA fuel-rod-code Benchmark Phase Iwas organized in 2010e2013. It consisted of four experiments on highly irradiated fuel rodlets testedunder different experimental conditions. This benchmark revealed the need to better understand thebasic models incorporated in each code for realistic simulation of the complicated integral RIA tests withhigh burnup fuel rods. A second phase of the benchmark (Phase II) was thus launched early in 2014,which has been organized in two complementary activities: (1) comparison of the results of differentsimulations on simplified cases in order to provide additional bases for understanding the differences inmodelling of the concerned phenomena; (2) assessment of the uncertainty of the results. The presentpaper provides a summary and conclusions of the second activity of the Benchmark Phase II, which isbased on the input uncertainty propagation methodology. The main conclusion is that uncertaintiescannot fully explain the difference between the code predictions. Finally, based on the RIA benchmarkPhase-I and Phase-II conclusions, some recommendations are made.
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