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Semiempirical model for wet scrubbing of bubble rising in liquid pool of sodium-cooled fast reactor 원문보기

Nuclear engineering and technology : an international journal of the Korean Nuclear Society, v.50 no.6, 2018년, pp.849 - 853  

Pradeep, Arjun (Indira Gandhi Centre for Atomic Research, HBNI) ,  Sharma, Anil Kumar (Indira Gandhi Centre for Atomic Research, HBNI)

Abstract ▼ AI-Helper 아이콘AI-Helper

Mechanistic calculations for wet scrubbing of aerosol/vapor from gas bubble rising in liquid pool are essential to safety of sodium-cooled fast reactor. Hence, scrubbing of volatile fission product from mixed gas bubble rising in sodium pool is presented in this study. To understand this phenomenon,...

주제어

#Aerosol   #Bubble   #Mass Transfer   #Sodium-cooled Fast Reactor Safety   #Wet Scrubbing  

AI 본문요약
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제안 방법

  • Based on the model that evaluated bubble dynamics of xenon bubble rising in sodium pool at 800 K, the scrubbing efficiency of liquid pool for NaI aerosols contained in xenon bubble has been evaluated. Fig.
  • The iodine bubble experiment [1] studied the scrubbing efficiency of sodium pool for nitro-gen-iodin mixture gas bubble rising in sodium pool. The conditions considered for the experiment were pool temperatures of 533 Ke811 K, pool depths of 1.8 and 3 m, initial iodine concentrations of 10, 50, and 100%, and initial bubble volume of 39 ml. The validation of aerosol scrubbing submodule of wet scrubbing model has been carried out using experimental results at high pool temperatures.
  • The model comprises of modules for evaluation of bubble dynamics and mass transport of aerosol/vapor. The model considers aerosol (NaI) capture by Brownian diffusion, inertial deposition, and gravitational sedimentation. The model simulates the scrubbing of volatile vapors (Cs, I) based on molecular diffusion in spherical geometry starting with uniform concentration inside and zero boundary condition.
  • The model considers aerosol (NaI) capture by Brownian diffusion, inertial deposition, and gravitational sedimentation. The model simulates the scrubbing of volatile vapors (Cs, I) based on molecular diffusion in spherical geometry starting with uniform concentration inside and zero boundary condition. The present model has been validated for the aerosol and vapor submodules based on experimental and theoretical results available in literature.
  • The present model evaluates the deposition coefficients of aerosol scrubbing for ellipsoidal bubble shape and analytically solves the Fick's diffusion equation to obtain the vapor scrubbing efficiency valid for all the bubble rise times typical to SFR pool. The study also provides details of parametric studies performed to determine the effect of various key parameters on pool scrubbing.
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참고문헌 (14)

  1. W.P. Kunkel, Fission-product Retention in Sodium: a Summary of Analytical and Experimental Studies at Atomics International, NAA-SR-11766, Atomics International, Canoga Park, Calif, 1966. 

  2. Quarterly Technical Progress Report, Nuclear Safety, Characterization of Sodium Fires and Fast Reactor Fission Products, AI-ERDA-13172, Atomics International, January-March 1976. 

  3. S. Miyahara, N. Sagawa, K. Shimoyama, Iodine mass transfer from xenoniodine mixed gas bubble to liquid sodium pool, (I) experiment, J. Nucl. Sci. Technol. 33 (1996) 128-133. 

    상세보기 crossref

  4. S. Miyahara, N. Sagawa, K. Shimoyama, Experimental and Analytical Studies of Iodine Mass Transfer from Xenon-Iodine Mixed Gas Bubble to Liquid Sodium Pool, Technical Committee Meeting on Evaluation of Radioactive Materials Release and Sodium Fires in Fast Reactor, IWGFR/92, O-arai, Japan, 1996. 

  5. S. Miyahara, N. Sagawa, Iodine mass transfer from xenon-iodine mixed gas bubble to liquid sodium pool, (II) Development of analytical model, J. Nucl. Sci. Technol. 33 (1996) 220-228. 

    상세보기 crossref

  6. M. Umbel, Containment Source Terms for Sodium-Cooled Fast Reactor Accidents, Master of Science Thesis, The Ohio State University, 2011, https://etd.ohiolink.edu/!etd.send_file?accessionosu1306506275&dispositioninline. 

  7. M. Bucknor, M. Farmer, D. Grabaskas, An Assessment of Fission Product Scrubbing in Sodium Pools Following a Core Damage Event in a Sodium Cooled Fast Reactor, Argonne National Laboratory (ANL), 2017. 

  8. V.G. Levich, Physiochemical Hydrodynamics, Prentice Hall, Englewood Cliffs, New Jersey, 1962. 

  9. S.H. Park, C. Park, J. Lee, B. Lee, A Simple Parameterization for the Rising Velocity of Bubbles in a Liquid Pool, Nucl. Eng. Technol. 49 (2017) 692-699. 

    원문보기 상세보기 crossref

  10. D.A. Powers, J.L. Sprung, A Simplified Model of Aerosol Scrubbing by a Water Pool Overlying Core Debris Interacting with Concrete, NUREG/CR-5901, 1992. 

  11. S. Miyahara, K. Shimoyama, Transport phenomena of iodine and noble gas mixed bubbles through liquid sodium, in: Liquid Metal Systems, 1995, pp. 27-33. 

  12. J.R. Welty, C.E. Wicks, G. Rorrer, R.E. Wilson, Fundamentals of Momentum, Heat and Mass Transfer, John Wiley and Sons, 2009. 

  13. J.K. Fink, L. Leibwitz, Thermodynamic and Transport Properties of Sodium Liquid and Vapor, ANL/RE-95/2IL, Argonne National Lab., United States, 1995. 

  14. J. Kestin, S.T. Ro, W.A. Wakeham, Viscosity of the noble gas in the temperature range 25 - 700 $^{\circ}C$ , J. Chem. Phys. 56 (1972) 4119-4124. 

    상세보기 crossref

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