The paper presents the activity performed at University of Pisa in the framework of the participation to the Phase Il of the BEMUSE (Best Estimate Methods — Uncertainty and Sensitivity Evaluation) Programme [1]. This activity has been promoted by the Working Group on Accident Management and Anaiysis (GAMA) and endorsed by the Committee on the Safety ofNuciear Instaliations (CSNI). The scope of the Programme is to perform Large Break Loss-Of-Cooiant Accident (LBLOCA) anaiyses making reference to experimental data and to a Nuclear Power Plant (NPP) in order to address the issue of the capabiiities of computational toois”inciuding scaiing/uncertainty analysis. The justification for such an activity comes from the consideration that a wide spectrum of uncertainty methods appiied to Best Estimate codes exist and are used in research iaboratories, but their practicabiiity and/or vaiidity is not sufficientiy estabiished to support generai use of the codes and acceptance by industry and safety authorities. The consideration of the Best Estimate codes and uncertainty evaluation for Design Basis Accident (DBA), by itseif, shows the safety significance of the proposed activity. The Phase Il of BEMUSE Programme [2] is connected with the re-anaiysis of the Experiment L2-5 performed in the LOFT (joss Qf Fiuid Test) facility in June 1982, as part of the LOFT Experimental Program conducted by EG&G Idaho, Inc., for the US Nuciear Reguiatory Commission. This was the third Loss Of Coolant Experiment (LOCE) in the LOFT Power Ascension Experiment Series L2.

Relap5/mod3.2 re-analysis and accuracy quantification of LOFT experiment L2-5

D'AURIA, FRANCESCO SAVERIO
2004-01-01

Abstract

The paper presents the activity performed at University of Pisa in the framework of the participation to the Phase Il of the BEMUSE (Best Estimate Methods — Uncertainty and Sensitivity Evaluation) Programme [1]. This activity has been promoted by the Working Group on Accident Management and Anaiysis (GAMA) and endorsed by the Committee on the Safety ofNuciear Instaliations (CSNI). The scope of the Programme is to perform Large Break Loss-Of-Cooiant Accident (LBLOCA) anaiyses making reference to experimental data and to a Nuclear Power Plant (NPP) in order to address the issue of the capabiiities of computational toois”inciuding scaiing/uncertainty analysis. The justification for such an activity comes from the consideration that a wide spectrum of uncertainty methods appiied to Best Estimate codes exist and are used in research iaboratories, but their practicabiiity and/or vaiidity is not sufficientiy estabiished to support generai use of the codes and acceptance by industry and safety authorities. The consideration of the Best Estimate codes and uncertainty evaluation for Design Basis Accident (DBA), by itseif, shows the safety significance of the proposed activity. The Phase Il of BEMUSE Programme [2] is connected with the re-anaiysis of the Experiment L2-5 performed in the LOFT (joss Qf Fiuid Test) facility in June 1982, as part of the LOFT Experimental Program conducted by EG&G Idaho, Inc., for the US Nuciear Reguiatory Commission. This was the third Loss Of Coolant Experiment (LOCE) in the LOFT Power Ascension Experiment Series L2.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/89050
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