1. bookVolume 63 (2018): Issue 2 (June 2018)
Journal Details
License
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
access type Open Access

Simulation of start-up behaviour of a passive autocatalytic hydrogen recombiner

Published Online: 31 Jul 2018
Volume & Issue: Volume 63 (2018) - Issue 2 (June 2018)
Page range: 27 - 41
Received: 08 Mar 2018
Accepted: 25 May 2018
Journal Details
License
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
Abstract

Heterogeneous catalytic recombination of hydrogen with oxygen is one of the methods used to remove hydrogen from the containment of a light-water nuclear reactor (LWR). Inside a passive autocatalytic recombiner (PAR), hydrogen and oxygen molecules are adsorbed at catalyst active spots and they recombine to yield water. Heat released in this exothermic reaction creates natural convection of gas in the spaces between the elements supporting a catalyst. Hot and humid gas flows upwards into the PAR chimney, while fresh, hydrogen-rich gas enters the PAR from below. Catalytic recombination should start spontaneously at room temperature and low hydrogen concentration. Computational fluid dynamics (CFD) has been used to study the dynamic behaviour of a plate-type Areva FR-380 recombiner in a quiescent environment for several test scenarios, including different rates of increase in hydrogen concentration and temporary catalyst deactivation. A method for the determination of pressure boundary conditions at the PAR exits was proposed and implemented into a CFD code. In this way, transient operation of PAR could be simulated without the need to model gas circulation outside the device. It was found that first a slow downward flow of gas is developed, which may persist until the temperature of the catalyst foils rises. As soon as the gas inside the PAR absorbs enough heat to become lighter than the gas outside the PAR, it starts to flow upwards. Criteria for determining the start-up time of PAR were proposed. Model predictions were also compared with experimental data obtained in tests conducted at the THAI facility.

Keywords

1. International Atomic Energy Agency. (2011). Mitigation of hydrogen hazards in severe accidents in nuclear power plants. Vienna: IAEA. (IAEA-TECDOC-1661).Search in Google Scholar

2. Rigas, F., & Amyotte, P. (2013). Hydrogen safety. New York: CRC Press, Taylor & Francis Group.Search in Google Scholar

3. Kanzleiter, T. (2009). OECD-NEA THAI Project. Quick look report. Hydrogen recombiner tests HR-1 to HR-5, HR-27 and HR-28. Eschborn, Germany: Becker Technologies GmbH. (Report no. 150 1326-HR-QLR-1).Search in Google Scholar

4. Areva Inc. (2011). Passive autocatalytic recombiner. Retrieved June 2017, from http://us.areva.com/EN/home-1495/passive-autocatalytic-recombiner-par.html.Search in Google Scholar

5. Simon, B., Reinecke, E.-A., Kubelt, C., & Allelein, H.-J. (2014). Start-up behaviour of a passive auto-catalytic recombiner under counter flow conditions: Results of a first orienting experimental study. Nucl. Eng. Des., 278, 317–322. DOI: 10.1016/j.nucengdes.2014.06.029.10.1016/j.nucengdes.2014.06.029Open DOISearch in Google Scholar

6. Liang, Z., Gardner, L., Clouther, T., & Thomas, B. (2016). Experimental study of effect of ambient flow condition on the performance of a passive autocatalytic recombiner. Nucl. Eng. Des., 301, 49–58. DOI: 10.1016/j.nucengdes.2016.03.005.10.1016/j.nucengdes.2016.03.005Open DOISearch in Google Scholar

7. Bachellerie, E., Arnould, F., Auglaire, M., de Boeck, B., Braillard, O., Eckardt, B., Ferroni, F., & Moffet, R. (2003). Generic approach for designing and implementing a passive autocatalytic recombiner PAR-system in nuclear power plant containments. Nucl. Eng. Des., 221, 151–165.10.1016/S0029-5493(02)00330-8Search in Google Scholar

8. Blanchat, T. K., & Malliakos, A. (1999). Analysis of hydrogen depletion using a scaled passive autocatalytic recombiner. Nucl. Eng. Des., 187, 229–239.10.1016/S0029-5493(98)00283-0Search in Google Scholar

9. Reinecke, E. -A., Tragsdorf, I. M., & Gierling, K. (2004). Studies on innovative hydrogen recombiners as safety devices in the containments of light water reactors. Nucl. Eng. Des., 230, 49–59. DOI: 10.1016/j.nucengdes.2003.10.009.10.1016/j.nucengdes.2003.10.009Open DOISearch in Google Scholar

10. Kelm, S., Schoppe, L., Dornseiffer, J., Hofmann, D., Reinecke, E.-A., Leistner, F., & Jühe, S. (2009). Ensuring the long-term functionality of passive auto-catalytic recombiners under operational containment atmosphere conditions – An interdisciplinary investigation. Nucl. Eng. Des., 239, 274–280. DOI: 10.1016/j.nucengdes.2008.10.029.10.1016/j.nucengdes.2008.10.029Search in Google Scholar

11. Kanzleiter, T. (2009). OECD-NEA THAI Project. Quick look report. Hydrogen recombiner tests HR-14 to HR-16. Eschborn, Germany: Becker Technologies GmbH. (Report no. 150 1326-HR-QLR-4).Search in Google Scholar

12. Orszulik, M., Fic, A., & Bury, T. (2015). CFD modeling of passive autocatalytic recombiners. Nukleonika, 60, 347–353. DOI: 10.1515/nuka-2015-0050.10.1515/nuka-2015-0050Open DOISearch in Google Scholar

13. Mimouni, S., Mechitoua, N., & Ouraou, M. (2011). CFD recombiner modelling and validation on the H2-PAR and Kali-H2 experiments. Sci. Technol. Nucl. Install., article ID 547514. DOI: 10.1155/2011/574514.10.1155/2011/574514Search in Google Scholar

14. Hoyes, J. R., & Ivings, M. J. (2016). CFD modelling of hydrogen stratification in enclosures: Model validation and application to PAR performance. Nucl. Eng. Des., 310, 142–153. DOI: 10.1016/j.nucengdes.2016.08.036.10.1016/j.nucengdes.2016.08.036Open DOISearch in Google Scholar

15. Kelm, S., Jahn, W., Reinecke, E.-A., & Allelein, H.-J. (2012). Passive auto-catalytic recombiner operation – validation of a CFD approach against OECD-THAI HR2 test. In Proceedings of OECD/NEA & IAEA Workshop on Experiments and CFD Codes Application to Nuclear Reactor Safety, 9–13 September 2012. Deajon, South Korea.Search in Google Scholar

16. Reinecke, E.-A., Kelm, S., Steffen, P.-M., Klauck, M., & Allelein, H.-J. (2016). Validation and application of the REKO-DIREKT code for the simulation of passive autocatalytic recombiners operational behaviour. Nucl. Technol., 196, 355–366. DOI: 10.13182/NT16-7.10.13182/NT16-7Open DOISearch in Google Scholar

17. Rożeń, A. (2015). Modelling of a passive autocatalytic hydrogen recombiner – a parametric study. Nukleonika, 60, 161–170. DOI: 10.1515/nuka-2015-0002.10.1515/nuka-2015-0002Open DOISearch in Google Scholar

18. Poling, B. E., Prausnitz, J. M., & O’Connell, J. P. (2001). The properties of gases and liquids. New York: McGraw-Hill.Search in Google Scholar

19. The European Stainless Steel Development Association. (2007). Stainless steel: Tables of technical properties. Materials and Application Series, 5. Luxemburg: Euro Inox.Search in Google Scholar

20. Boehm, J. (2007). Modellierung der Prozesse in katalytischen Rekombinatoren. Schriften des Forschungszentrums Jülich, Reihe Energietechnik, Band 61.Search in Google Scholar

21. Monarch Instrument. (2003). Table of emissivity. Retrieved June 2017, from https://monarchinstrument.com/pages/library.Search in Google Scholar

22. Warnatz, J., Allendorf, M. D., Kee, R. J., & Coltrin, M. E. (1994). A model of elementary chemistry and fluid mechanics in the combustion of hydrogen on platinum surfaces. Combust. Flame, 96, 393–406.10.1016/0010-2180(94)90107-4Open DOISearch in Google Scholar

23. Schefer, R. W., Cheng, R. K., Robben, F. A., & Brown, N. J. (1978). Catalyzed combustion of H2/air mixtures on a heated platinum plate. In The Western States Section/The Combustion Institute, Spring Meeting, 17–18 April 1978 (Paper No. 78–33). Boulder, CO, USA.Search in Google Scholar

24. Idelchik, I. E. (2008). Handbook of hydraulic resistance. New York: Begell House, Inc.Search in Google Scholar

25. Shah, R. K., & London, A. L. (1978). Laminar flow forced convection in ducts. In T. F. Irvine, J. P. Hartnett (Eds.), Advances in heat transfer. Suppl. 1. New York: Academic Press.Search in Google Scholar

26. Zhi-qing, W. (1982). Study on correction coefficients of laminar and turbulence entrance region effect in round pipe. Appl. Math. Mech., 3, 433–446.10.1007/BF01897224Search in Google Scholar

27. ANSYS, Inc. (2016). ANSYS Fluent Theory Guide. Release 17.2. Canonsburg: ANSYS, Inc. Retrieved June 2017, from https://pl.scribd.com/document/342817281/ANSYS-Fluent-Theory-Guide.Search in Google Scholar

28. Dimotakis, P. E. (2000). The mixing transition in turbulent flows. J. Fluid Mech., 409, 69–98.10.1017/S0022112099007946Search in Google Scholar

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