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Science and Technology of Nuclear Installations
Volume 2012, Article ID 436142, 18 pages
http://dx.doi.org/10.1155/2012/436142
Research Article

Analysis of the NUPEC PSBT Tests with FLICA-OVAP

CEA, DEN, DM2S/STMF, 91191 Gif-sur-Yvette, France

Received 2 May 2012; Accepted 2 July 2012

Academic Editor: Alessandro Petruzzi

Copyright © 2012 Matteo Bucci and Philippe Fillion. 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

This paper discusses the results of a computational activity devoted to the prediction of two-phase flows in subchannels and in rod bundles. The capabilities of the FLICA-OVAP code have been tested against an extensive experimental database made available by the Japanese Nuclear Power Energy Corporation (NUPEC) in the frame of the PWR subchannel and bundle tests (PSBT) international benchmark promoted by OECD and NRC. The experimental tests herein addressed involve void fraction distributions and boiling crisis phenomena in rod bundles with uniform and nonuniform heat flux conditions. Both steady-state and transient scenarios have been addressed, including power increase, flow reduction, temperature increase, and depressurization, representative of PWR thermal-hydraulics conditions. After a brief description of the main features of FLICA-OVAP, the relevant physical models available within the code are detailed. Results obtained in the different tests included in the PSBT void distribution and DNB benchmarks are therefore reported. The relevant role of selected physical models is discussed.