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Science and Technology of Nuclear Installations
Volume 2010 (2010), Article ID 219294, 9 pages
Research Article

Main Results of Phase IV BEMUSE Project: Simulation of LBLOCA in an NPP

1Technical University of Catalonia (UPC), Diagonal 647, 08028 Barcelona, Spain
2Atomic Energy Research Institute, Hungary
3Commissariat à l'Energie Atomique, France
4EDO Guidropress, Russia
5Gesellschaft für Anlagen- und Reaktorsicherheit, Germany
6Institut de Radioprotection et de Sûreté Nucléaire, France
7Japan Nuclear Energy Safety, Japan
8Korea Atomic Energy Research Institute, South Korea
9Korean Institute of Nuclear Safety, South Korea
10Nuclear Research Institute, Czech Republic
11Paul Scherrer Institute, Switzerland
12University of Pisa, Italy

Received 19 June 2009; Accepted 6 January 2010

Academic Editor: Michel Giot

Copyright © 2010 M. Pérez et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Phase IV of BEMUSE Program is a necessary step for a subsequent uncertainty analysis. It includes the simulation of the reference scenario and a sensitivity study. The scenario is a LBLOCA and the reference plant is Zion 1 NPP, a 4 loop PWR unit. Thirteen participants coming from ten different countries have taken part in the exercise. The BEMUSE (Best Estimate Methods plus Uncertainty and Sensitivity Evaluation) Program has been promoted by the Working Group on Accident Management and Analysis (WGAMA) and endorsed by the Committee on the Safety of Nuclear Installations (CSNI). The paper presents the results of the calculations performed by participants and emphasizes its usefulness for future uncertainty evaluation, to be performed in next phase. The objectives of the activity are basically to simulate the LBLOCA reproducing the phenomena associated to the scenario and also to build a common, well-known, basis for the future comparison of uncertainty evaluation results among different methodologies and codes. The sensitivity calculations performed by participants are also presented. They allow studying the influence of different parameters such as material properties or initial and boundary conditions, upon the behaviour of the most relevant parameters related to the scenario.