Nuclear Engineering and Technology

  • 제51권6호
  • /
  • Pages.1514-1524
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  • 2019
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Preliminary numerical study on hydrogen distribution characteristics in the process that flow regime transits from jet to buoyancy plume in time and space

  • Wang, Di (School of Mechanical Engineering, Shanghai Jiao Tong University) ;
  • Tong, Lili (School of Mechanical Engineering, Shanghai Jiao Tong University) ;
  • Liu, Luguo (Key Laboratory of Nuclear Reactor System Design Technology, Nuclear Power Institute of China) ;
  • Cao, Xuewu (School of Mechanical Engineering, Shanghai Jiao Tong University) ;
  • Zou, Zhiqiang (Key Laboratory of Nuclear Reactor System Design Technology, Nuclear Power Institute of China) ;
  • Wu, Lingjun (Key Laboratory of Nuclear Reactor System Design Technology, Nuclear Power Institute of China) ;
  • Jiang, Xiaowei (Key Laboratory of Nuclear Reactor System Design Technology, Nuclear Power Institute of China)
  • 투고 : 2018.10.23
  • 심사 : 2019.05.01
  • 발행 : 2019.09.25
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초록

Hydrogen-steam gas mixture may be injected into containment with flow regime varying both spatially and transiently due to wall effect and pressure difference between primary loop and containment in severe accidents induced by loss of coolant accident. Preliminary CFD analysis is conducted to gain information about the helium flow regime transition process from jet to buoyancy plume for forthcoming experimental study. Physical models of impinging jet and wall condensation are validated using separated effect experimental data, firstly. Then helium transportation is analyzed with the effect of jet momentum, buoyancy and wall cooling discussed. Result shows that helium distribution is totally dominated by impinging jet in the beginning, high concentration appears near gas source and wall where jet momentum is strong. With the jet weakening, stable light gas layer without recirculating eddy is established by buoyancy. Transient reversed helium distribution appears due to natural convection resulted from wall cooling, which delays the stratification. It is necessary to concern about hydrogen accumulation in lower space under the containment external cooling strategy. From the perspective of experiment design, measurement point should be set at the height of connecting pipe and near the wall for stratification stability criterion and impinging jet modelling validation.

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과제정보

연구 과제 주관 기관 : National Research Council of Science and Technology, National Natural Science Foundation of China

참고문헌

  1. H. Karwat, Distribution of hydrogen within the HDR-containment under severe accident conditions, in: OECD standard problem. Final comparison report. Lehrstuhl fuer Reaktordynamik und Reaktorsicherheit, Technische Universitaet Muenchen, Germany, 1992.
  2. E. Della Loggia, Hydrogen Behaviour and Mitigation in Water-Cooled Nuclear Power Reactors, Commission of the European Communities, Luxembourg, 1992.
  3. M. Heitsch, D. Baraldi, H. Wilkening, Validation of CFD for containment jet flows including condensation, in: XCFD4NRS OECD/NEA & IAEA Workshop, Grenoble, France, September 10-12, 2008.
  4. B.R. Sehgal, Nuclear Safety in Light Water Reactors: Severe Accident Phenomenology, OECD/NEA, Academic Press (An imprint of Elsevier), 2012.
  5. S. Schwarz, K. Fischer, A. Bentaib, et al., Benchmark on hydrogen distribution in a containment based on the OECD-NEA Thai HM-2 experiment, Nucl. Technol. 175 (2011) 594-603. https://doi.org/10.13182/NT11-A12508
  6. M. Sonnenkalb, G. Poss, The international test programme in the Thai Facility and its use for code validation, in: EUROSAFE Forum, 2009. Brussels, Belgium, November 2-3.
  7. OECD/NEA, Thai Project Hydrogen and Fission Product Issues Relevant for Containment Safety Assessment Final Report, OECD Nuclear Energy Agency, 2010. NEA/CSNI/R(2010)3.
  8. O. Auban, R. Zboray, D. Paladino, Investigation of large-scale gas mixing and stratification phenomena related to LWR containment studies in the PANDA facility, Nucl. Eng. Des. 237 (2007) 409-419. https://doi.org/10.1016/j.nucengdes.2006.07.011
  9. OECD/NEA, OECD/SETH-2 Project PANDA and MISTRA Experiments Final Summary Report, OECD Nuclear Energy Agency, 2012. NEA/CSNI/R(2012)5.
  10. OECD/NEA, International Standard Problem ISP-47 on Containment Thermal Hydraulics Final Report, OECD Nuclear Energy Agency, 2007. NEA/CSNI/R(2007)10.
  11. B.W. Webb, C. Ma, Single-phase liquid jet impingement heat transfer, Adv. Heat Tran. 26 (1995) 105-217. https://doi.org/10.1016/S0065-2717(08)70296-X
  12. G.H. Jirka, Turbulent Buoyant Jets in Shallow Fluid Layers, Turbulent Buoyant Jets and Plumes, Pergamon Press, New York, 1982.
  13. D. Wang, X. Cao, Numerical analysis of different break direction effect on hydrogen behavior in containment during a hypothetical LOCA, Ann. Nucl. Energy 110 (2017) 856-864. https://doi.org/10.1016/j.anucene.2017.06.054
  14. S. Ashforth-frost, K. Jambunathan, C.F. Whitney, Velocity and turbulence characteristics of a semiconfined orthogonally impinging slot jet, Exp. Therm. Fluid Sci. 14 (1997) 60-67. https://doi.org/10.1016/S0894-1777(96)00112-4
  15. Z. Jiang, V. Modi, Near wall measurements for a turbulent impinging slot jet, J. Fluids Eng. 123 (2001) 112-120. https://doi.org/10.1115/1.1343085
  16. J.E. Jaramillo, C.D. Perez-segarra, I. Rodriguez, et al., Numerical study of plane and round impinging jets using RANS models, Numer. Heat Tran. B 54 (2008) 213-237. https://doi.org/10.1080/10407790802289938
  17. J.C. de la Rosa, A. Escriva, L.E. Herranz, et al., Review on condensation on the containment structures, Prog. Nucl. Energy 51 (2009) 32-66. https://doi.org/10.1016/j.pnucene.2008.01.003
  18. H. Liu, X. Cao, Numerical study on hydrogen flow behavior in two compartments with different connecting pipes, Science and Technology of Nuclear Installations 6 (2017) 1-10.
  19. Y. Li, H. Zhang, J. Xiao, et al., Numerical investigation of natural convection inside the containment with recovering passive containment cooling system using GASFLOW-MPI, Ann. Nucl. Energy 114 (2018) 1-10. https://doi.org/10.1016/j.anucene.2017.11.047

피인용 문헌

  1. Experimental study on hydrogen behavior and possible risk with different injection conditions in local compartment vol.52, pp.8, 2019, https://doi.org/10.1016/j.net.2020.01.030
  2. Improvement of Condensation Model With the Presence of Non-Condensable Gas for Thermal-Hydraulic Analysis in Containment vol.9, 2021, https://doi.org/10.3389/fenrg.2021.671539