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Science and Technology of Nuclear Installations
Volume 2011 (2011), Article ID 215363, 7 pages
Review Article

INVAP's Nuclear Calculation System

Nuclear Engineering Department, INVAP SE, Comandante Luis Piedra Buena 4950, (8430) San Carlos de Bariloche, R8403CPV Río Negro, Argentina

Received 25 August 2010; Accepted 23 November 2010

Academic Editor: Juan Ferreri

Copyright © 2011 Ignacio Mochi. 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.


Since its origins in 1976, INVAP has been on continuous development of the calculation system used for design and optimization of nuclear reactors. The calculation codes have been polished and enhanced with new capabilities as they were needed or useful for the new challenges that the market imposed. The actual state of the code packages enables INVAP to design nuclear installations with complex geometries using a set of easy-to-use input files that minimize user errors due to confusion or misinterpretation. A set of intuitive graphic postprocessors have also been developed providing a fast and complete visualization tool for the parameters obtained in the calculations. The capabilities and general characteristics of this deterministic software package are presented throughout the paper including several examples of its recent application.