DOI QR코드

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Investigation of computational model for the natural circulation at dual channel facility

  • Marwa A. Shewita (Chemical Engineering Department, Faculty of Engineering, Minia University) ;
  • Ebrahiem Esmail Ebrahiem (Chemical Engineering Department, Faculty of Engineering, Minia University) ;
  • C. Allison (Innovative System Software ISS) ;
  • Moustapha Salem Mansour (Chemical Engineering Department, Faculty of Engineering, Alexandria University) ;
  • Ayah E. Elshahat (Nuclear and Radiation Department, Faculty of Engineering, Alexandria University) ;
  • Mahmoud M. Taha (Chemical Engineering Department, Faculty of Engineering, Alexandria University)
  • 투고 : 2023.11.11
  • 심사 : 2024.08.17
  • 발행 : 2024.11.25

초록

The current work investigates a computational model to study the thermal and hydraulic air behavior during the natural circulation at air ingression and accidents. This is done with the RHYS coupling ASYST VER 4 package. The test facility considered for the present study is a dual vertical channel facility comprised of two parallel channels connected to the upper and lower plenum. The flow fields in the heated and cooled channels were comprehensively characterized by analyzing axial temperature and velocity distributions using varied uniform iso-flux (100-1400 W/m2) and different outer surface temperatures (278, 288, 298, and 308 K). Temperature and velocity reversal recorded after maximal spots due to natural convection. The temperature rise from 278 to 308 K gave an average of 25.51 and 25.19° increase in air and inner wall temperatures, respectively, while air velocity increases at high cooling intensity (278 K) within the heated channel, in the cooled channel, low cooling intensity (308 K) resulted in higher velocity. The convective heat transfer is represented in terms of heat transfer coefficients, which are used to compute the Nusselt number. Additionally, the ASYST model was validated with data from literature sources, indicating strong agreement.

키워드

과제정보

The authors would like to express profound gratitude to the ISS team and the FUTURE RHYS team who gave us the source and license for using ASYST VER 4 and RHYS programs. We would also like to express our thanks to Tark El-Nour, who let us work in his lab at the Faculty of Engineering, Alexandria University.

참고문헌

  1. F.G. Cocheme, Assessment of Passive Decay Heat Removal in the General Atomics Modular Helium Reactor, Texas A&M University, 2005. 
  2. J. Kelly, T. Dujardin, H. Paillere, GIF's Role in Developing the Nuclear Technologies of the Future, NEA news, 2013. 
  3. S.M. Alshehri, I.A. Said, S. Usman, A review and safety aspects of modular high-temperature gas-cooled reactors, Int. J. Energy Res. 45 (8) (2021) 11479-11492.  https://doi.org/10.1002/er.6289
  4. S.M. Alshehri, Plenum-to-plenum Heat Transfer Characteristics under Natural Circulation in a Scaled-Down Prismatic Modular Reactor, 2019. 
  5. Y. Xu, K. Zuo, Overview of the 10 MW high temperature gas cooled reactor-test module project, Nucl. Eng. Des. 218 (1-3) (2002) 13-23.  https://doi.org/10.1016/S0029-5493(02)00181-4
  6. S. Ball, Sensitivity studies of modular high-temperature gas-cooled reactor (MHTGR) postulated accidents, in: 2nd International Topical Meeting on HIGH TEMPERATURE REACTOR TECHNOLOGY, 2004. Beijing, China. 
  7. Z. Wang, et al., Numerical investigation on direct contact condensation-induced water hammer in passive natural circulation system for offshore applications, Numer. Heat Tran., Part A: Applications 82 (6) (2022) 317-334.  https://doi.org/10.1080/10407782.2022.2078588
  8. S. Tan, G. Su, P. Gao, Experimental study on two-phase flow instability of natural circulation under rolling motion condition, Ann. Nucl. Energy 36 (1) (2009) 103-113.  https://doi.org/10.1016/j.anucene.2008.09.014
  9. O. Mazurok, et al., Baseline RELAP/SCDAPSIM and ASYST calculations-estimates of the likely reactor behavior in the event of an SBO-related event for Ukrainian VVER-1000 NPPs, in: 13th International Conference of the Croatian Nuclear Society, Zadar, Croatia, 2022. 
  10. A. Trivedi, D. Novog, C. Allison, Implementation of solar salt as fluid in ASYST4. 1 and validation for a natural circulation loop, in: International Conference on Nuclear Engineering, American Society of Mechanical Engineers, 2021. 
  11. S. Sadek, et al., Uncertainty study of the in-vessel phase of a severe accident in a pressurized water reactor, Energies 15 (5) (2022) 1842. 
  12. R. Pericas, et al., Relap/Scdapsim and Asyst Ver 3 Fukushima Related Activities, 2022. Available at: SSRN 4673018. 
  13. D. Pialla, et al., Overview of the system alone and system/CFD coupled calculations of the PHENIX Natural Circulation Test within the THINS project, Nucl. Eng. Des. 290 (2015) 78-86.  https://doi.org/10.1016/j.nucengdes.2014.12.006
  14. S.J. Zheng Fu, FUTURE RHYS (2024). Available from: http://relap.com/rhys/. 
  15. C. Allison, J. Hohorst, Role of RELAP/SCDAPSIM in nuclear safety, Science and technology of Nuclear Installations 2010 (2010). 
  16. C. Allison, et al., The Development of RELAP5/SCDAPSIM/MOD4. 0 for Reactor System Analysis and Simulation, 2008. 
  17. C. Allison, et al., Development and preliminary assessment of the new ASYST-ISA integral analysis BEPU code using the PBF SFD-ST bundle heating and melting experiment, a typical BWR under fukushima-daiichi-accident-like thermal hydraulic conditions and PWR for a steam line break in the containment, in: Proceedings of ICAPP, 2020. 
  18. (ISS), I.S.S.c., Idaho Falls, United State. 
  19. S.J. Zheng Fu, Heavy liquid simulation, Available from: https://breitaccom-my.sharepoint.com/:v:/g/personal/fuzheng_breitac_com/EfWN9NZOO0xEnegSFzcr2XwBw5xjYOWfYQopqgBhCmEt_w?e=l4Fzvs,
  20. M.M.T. Moharam, Experimental investigations of natural circulation in a separate-and-mixed effects test facility. Mimicking Prismatic Modular Reactor (PMR) Core, Missouri University of Science and Technology, 2017. 
  21. I.A. Said, et al., Investigation of natural convection heat transfer in a unique scaled-down dual-channel facility, AIChE J. 63 (1) (2017) 387-396.  https://doi.org/10.1002/aic.15583
  22. I.A. Said, et al., Axial dispersion and mixing of coolant gas within a separate-effect prismatic modular reactor, Nuclear Energy and Technology 4 (3) (2018) 167-178.  https://doi.org/10.3897/nucet.4.27346
  23. I.A. Said, et al., Effect of helium pressure on natural convection heat transfer in a prismatic dual-channel circulation loop, Int. J. Therm. Sci. 124 (2018) 162-173.  https://doi.org/10.1016/j.ijthermalsci.2017.10.004
  24. I.A. Said, et al., Experimental investigation of the helium natural circulation heat transfer in two channels facility using varying riser channel heat fluxes, Exp. Therm. Fluid Sci. 93 (2018) 195-209.  https://doi.org/10.1016/j.expthermflusci.2017.12.027
  25. M.M. Taha, et al., Buoyancy-driven air flow within plenum-to-plenum facility down-comer channel, Exp. Therm. Fluid Sci. 94 (2018) 205-214.  https://doi.org/10.1016/j.expthermflusci.2018.02.003
  26. M.M. Taha, et al., Temperature and velocity instrumentation and measurements within a separate-effects facility representing modular reactor core, Int. J. Therm. Sci. 136 (2019) 148-158.  https://doi.org/10.1016/j.ijthermalsci.2018.10.024
  27. M.M. Taha, et al., Natural convection inside heated channel of a facility representing prismatic modular reactor core, AIChE J. 64 (9) (2018) 3467-3478.  https://doi.org/10.1002/aic.16185
  28. M.M. Taha, et al., Effect of non-uniform heating on temperature and velocity profiles of buoyancy driven flow in vertical channel of prismatic modular reactor core, Appl. Therm. Eng. (2023) 120209. 
  29. M.A. Shewita, et al., Investigation of natural helium circulation inside dual channels prismatic modular reactor, Ann. Nucl. Energy 207 (2024) 110694. 
  30. A. Marwa, C.A. Shewitah, Ibrahim Ismail Ibrahim, M.M.T. Moustapha Salem Mansour, E. Ayah, El-Shahat Numerical investigation of natural circulation inside a scaled-down prismatic modular reactor, in: ERMSAR Conference, May 2024. Stockholm, Sweden. 
  31. E.J.T. Moore, Relap5-3d Model Validation and Benchmark Exercises for Advanced Gas Cooled Reactor Application, Texas A&M University, 2006. 
  32. E. Sanvicente, et al., Transitional natural convection flow and heat transfer in an open channel, Int. J. Therm. Sci. 63 (2013) 87-104.  https://doi.org/10.1016/j.ijthermalsci.2012.07.004
  33. K. Kihm, J. Kim, L. Fletcher, Onset of flow reversal and penetration length of natural convective flow between isothermal vertical walls, TRANSACTIONS-AMERICAN SOCIETY OF MECHANICAL ENGINEERS JOURNAL OF HEAT TRANSFER 117 (1995) 776, 776. 
  34. G.E. Lau, et al., Numerical and experimental investigation of unsteady natural convection in a vertical open-ended channel, Comput. Therm. Sci.: Int. J. 4 (5) (2012). 
  35. Y. Jaluria, B. Gebhart, On transition mechanisms in vertical natural convection flow, J. Fluid Mech. 66 (2) (1974) 309-337.  https://doi.org/10.1017/S002211207400022X
  36. C. Muresan, et al., Numerical simulation of a vertical solar collector integrated in a building frame: radiation and turbulent natural convection coupling, Heat Tran. Eng. 27 (2) (2006) 29-42.  https://doi.org/10.1080/01457630500397658
  37. A. Ede, Natural convection on free vertical surfaces, East Kilbride, Glasgow: Mechanical Engineering Research Laboratory Report Heat (1956) 141. 
  38. M. Kageyama, R. Izumi, Natural heat convection in a vertical circular tube, Bulletin of JSME 13 (57) (1970) 382-394.  https://doi.org/10.1299/jsme1958.13.382
  39. L.P. Davis, J.J. Perona, Development of free convection flow of a gas in a heated vertical open tube, Int. J. Heat Mass Tran. 14 (7) (1971) 889-903.  https://doi.org/10.1016/0017-9310(71)90116-5
  40. J. Dyer, The development of laminar natural-convective flow in a vertical uniform heat flux duct, Int. J. Heat Mass Tran. 18 (12) (1975) 1455-1465.  https://doi.org/10.1016/0017-9310(75)90260-4
  41. H.A. Mohammed, Y.K. Salman, Laminar air flow free convective heat transfer inside a vertical circular pipe with different inlet configurations, Therm. Sci. 11 (1) (2007) 43-63.