Advertisement

CFD Analysis of Molten Fluoride Salt Natural Circulation in a Rectangular Loop

  • Rakesh ChouhanEmail author
  • A. Borgohain
  • A. K. Shrivastava
  • N. K. Maheshwari
  • P. K. Vijayan
Conference paper

Abstract

Indian Molten Salt Breeder Reactor (IMSBR) is being designed and developed in BARC with main objective of utilizing thorium abundance in India. In order to design the reactor, it is necessary to study the thermal-hydraulic behavior of various molten salts. Moreover, considering the importance of natural circulation in high-temperature systems, experimental studies on natural circulation of molten salts are required. This paper deals with the fabrication of loop with molten salt, LiF + ThF4 (22.5–77.5 wt%), which is proposed as blanket salt for IMSBR program. Loop is fabricated with 15 NB Sch 40 pipe made of Hastelloy-N material having height of 400 mm and width of 300 mm. CFD analysis for natural circulation of the same loop is also carried out. CFD simulation is performed for steady state and transient cases at different heater powers. Various transients, such as step power change, heater trip, and start-up of natural circulation, are also carried out. Comparison of CFD results with standard correlation for steady state flow has been done.

Keywords

MSBR Molten fluoride salt OpenFOAM Computational domain 

Nomenclature

c

Constant in steady state correlation

g

Acceleration due to gravity, m/s2

Grm

Modified Grashof number

h

Heat transfer coefficient, W/m2 K

Lt

Total length, m

NG

Geometry parameter

Q

Total heat input, W

r

Constant in steady state correlation

Ress

Steady state Reynolds number, vDh/υ

t

Time, s

T

Temperature, °C

Uz

Velocity along heater

Uy

Velocity along cooler

References

  1. 1.
    K. Furukawa, K. Arakawa, L.B. Erbay, Y. Ito, Y. Kato, H. Kiyavitskaya, A. Lecocq, K. Mitachi, R.W. Moir, H. Numata, J.P. Pleasant, Y. Sato, Y. Shimazu, V.A. Simonenco, D.D. Sood, C. Urban, R. Yoshioka, A road map for the realization of global scale thorium breeding fuel cycle by single molten fluoride flow. Energy Convers. Manag. 49, 1832–1847 (2008)CrossRefGoogle Scholar
  2. 2.
    H.K. Versteeg, W. Malasekra, An Introduction to Computation Fluid Dynamics. The finite volume method (1995)Google Scholar
  3. 3.
    J.W. Cooke, Development of the Variable Gap Technique for Measuring the Thermal Conductivity of Fluoride Salt Mixtures, ORNL-4831. Oak Ridge National Laboratory (1973)Google Scholar
  4. 4.
    L. Bin, W. Yu-ting, M. Chong-fang, Y. Meng, G. Hang, Turbulent convective heat transfer with molten salt in a circular pipe. Int. Commun. Heat Mass Transf. 36, 912 (2009)CrossRefGoogle Scholar
  5. 5.
    M.D. Silverman, W.R. Huntley H.E. Robertson, Heat transfer measurements in a forced convection loop with two molten fluoride salts: LiF–BeF2–ThF4–UF4 and EUTECTIC NaBF4–NaF, in Report No. ORNL/TM-5335, pp. 16–21 (1976)Google Scholar
  6. 6.
    P. Mandin, H. Belachgar, A. Nuttin, G. Picard, Hydrothermal Modeling for the Molten Salt Reactor Design Optimization, in The 11th International Topical Meeting on Nuclear Reactor Thermal-Hydraulics (NURETH-11), France, 2–6 Oct 2005Google Scholar
  7. 7.
    V. Khokhlov, V. Ignatiev, V. Afonichkin, Evaluating physical properties of molten salt reactor fluoride mixtures. J. Fluor. Chem. 130, 30 (2009)CrossRefGoogle Scholar
  8. 8.
    G.L. Yoder, D. Heatherl, Jr., D. Williams, Liquid Fluoride Salt Experiment Using a Small Natural Circulation Cell. ORNL/TM-2014/56 (2014)Google Scholar
  9. 9.
    Y.M. Ferng, K.Y. Lin, C.W. Chi, CFD investigating thermal-hydraulic characteristics of FLiNaK salt as a heat exchange fluid. Appl. Therm. Eng. 37, 235–240 (2012)CrossRefGoogle Scholar
  10. 10.
    S.V. Patankar, Numerical Heat Transfer and Fluid Flow (Hemisphere Publishing Corp, New York, 1981)zbMATHGoogle Scholar
  11. 11.
    P.K. Vijayan, Experimental observations on the general trends of the steady state and stability behavior of single phase natural circulation loops. Nucl. Eng. Des. 215, 139–152 (2002)CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Rakesh Chouhan
    • 1
    Email author
  • A. Borgohain
    • 1
  • A. K. Shrivastava
    • 1
  • N. K. Maheshwari
    • 1
  • P. K. Vijayan
    • 1
  1. 1.Reactor Engineering DivisionBhabha Atomic Research CentreTrombay, MumbaiIndia

Personalised recommendations