Thermal Hydraulic Studies of Compact High Temperature Reactor
A. Borgohain1,a, N. K. Maheshwari1,b, P. K. Vijayan1,c, D. Saha1,d and R. K. Sinha2
1Reactor Engineering Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
abananta@barc.gov.in
bnmahesh@barc.gov.in
cvijayanp@barc.gov.in
ddsaha@barc.gov.in
2Reactor Design & Development Group, Bhabha Atomic Research Centre, Trombay, India.
rksinha@barc.gov.in
ABSTRACT
The design of Compact High Temperature Reactor (CHTR) is in progress in BARC. Lead Bismuth Eutectic (LBE) is being considered as the primary coolant of the reactor. The use of accurate heat transfer model in Lead Bismuth Eutectic (LBE) flow is essential for the designing of the liquid metal cooled nuclear reactor systems. Assessment of different parameters like, turbulent Prandtl number and turbulence models are essential before going for the detailed thermal hydraulic analysis of the whole system. In the present study, various available correlations for Prt are assessed by incorporating them in the CFD code PHOENICS-3.6 and predicting heat transfer in LBE flow through circular tube. The evaluation of the various turbulence models in the tube geometry for liquid metal heat transfer is also carried out. Based on the assessment of the existing correlations for heat transfer in LBE flow and the CFD results achieved, the bestsuited correlation for turbulent Prandtl number (Prt) is recommended as a function of Peclet number. This Prt can be incorporated in PHOENICS for LBE flow analysis. 3D CFD analysis of the reactor core has been carried out to estimate the core heat removal capability by natural circulation and the temperature distribution in the core during normal operating conditions. Analysis is also carried out to study accidental conditions. This paper deals with the details of the CFD analysis, determination of heat transfer coefficients for LBE flow in tubes by CFD code PHOENICS and its comparison with the experimental data. The details of the CFD analysis of the CHTR core are also described here.
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