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Science and Technology of Nuclear Installations
Volume 2008, Article ID 153858, 13 pages
http://dx.doi.org/10.1155/2008/153858
Research Article

Thermal-Hydraulic Analysis Tasks for ANAV NPPs in Support of Plant Operation and Control

1Institute of Energy Technologies, Technical University of Catalonia (UPC), Avinguda Diagonal 647, Barcelona 08028, Spain
2Department of Physics and Nuclear Engineering, Technical University of Catalonia (UPC), Avinguda Diagonal 647, Barcelona 08028, Spain
3Asociación Nuclear Ascó-Vandellòs (ANAV), Edifici Seu, Apartat Correus 48, L'Hospitalet de l'Infant, Tarragona 43890, Spain

Received 9 May 2007; Accepted 31 August 2007

Academic Editor: Alessandro Petruzzi

Copyright © 2008 F. Reventós 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.

Abstract

Thermal-hydraulic analysis tasks aimed at supporting plant operation and control of nuclear power plants are an important issue for the Asociación Nuclear Ascó-Vandellòs (ANAV). ANAV is the consortium that runs the Ascó power plants (2 units) and the Vandellòs-II power plant. The reactors are Westinghouse-design, 3-loop PWRs with an approximate electrical power of 1000 MW. The Technical University of Catalonia (UPC) thermal-hydraulic analysis team has jointly worked together with ANAV engineers at different levels in the analysis and improvement of these reactors. This article is an illustration of the usefulness of computational analysis for operational support. The contents presented were operational between 1985 and 2001 and subsequently changed slightly following various organizational adjustments. The paper has two different parts. In the first part, it describes the specific aspects of thermal-hydraulic analysis tasks related to operation and control and, in the second part, it briefly presents the results of three examples of analyses that were performed. All the presented examples are related to actual situations in which the scenarios were studied by analysts using thermal-hydraulic codes and prepared nodalizations. The paper also includes a qualitative evaluation of the benefits obtained by ANAV through thermal-hydraulic analyses aimed at supporting operation and plant control.