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Prediction of Gas-Holdup in Filtered Containment Venting System

[+] Author Affiliations
Tobias Strömgren, Sven Perzon, Martin Karlsson

Westinghouse Electric Sweden AB, Västerås, Sweden

Eric Lillberg

Vattenfall Research and Development AB, Älvkarleby, Sweden

Paper No. ICONE22-30793, pp. V003T06A032; 6 pages
doi:10.1115/ICONE22-30793
From:
  • 2014 22nd International Conference on Nuclear Engineering
  • Volume 3: Next Generation Reactors and Advanced Reactors; Nuclear Safety and Security
  • Prague, Czech Republic, July 7–11, 2014
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-4593-6
  • Copyright © 2014 by ASME

abstract

A filter system to be used in order to reduce the radioactive pollution when reducing the pressure in the containment in case of a severe accident is developed. The radioactive pollution will be captured in the vessel that acts as a bubble column. To be able to maximize the water content in order to ensure that the radioactive pollution is captured it is of importance to predict the swelled water level in the vessel. In this study is three different methods to predict the gas holdup is presented and compared to experimental results; empirical correlations, thermal-hydraulic codes and Computational Fluid Dynamics (CFD). The advantages and disadvantages with the different methods are discussed.

Both Computational Fluid Dynamics and the thermal hydraulic code (Gothic) show good predictions of the water level. Using empirical models it is crucial to have knowledge of the two-phase flow region in the bubble column.

Copyright © 2014 by ASME
Topics: Containment

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