Journal of Nuclear Energy Science & Power Generation TechnologyISSN: 2325-9809

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Research Article, J Nucl Ene Sci Power Generat Technol Vol: 5 Issue: 1

Design of a Heavy Liquid Metal Neutron Spallation Target for Experimental Accelerator driven Sub-critical Reactor

Rawat RS1*, Swain PK1, Rai PK1, Tiwari V1, Satyamurthy P1 and Despande AV2
1ADS Target Development Section, Bhabha Atomic Research Centre, Mumbai, India
2Veermata Jijabai Technical Institute, Mumbai, India
Corresponding author : Ravindra Singh Rawat
Akashganga, Anushaktinagar, Mumbai, India
E-mail: [email protected]
Received: July 29, 2014 Accepted: January 02, 2016 Published: January 12, 2016
Citation: Rawat RS, Swain PK, Rai PK, Tiwari V, Satyamurthy P, et al. (2016) Design of a Heavy Liquid Metal Neutron Spallation Target for Experimental Accelerator driven Sub-critical Reactor. J Nucl Ene Sci Power Generat Technol 5:1. doi:10.4172/2325-9809.1000143

Abstract

In this paper detailed design of a liquid metal Lead-Bismuth-Eutectic (LBE) neutron spallation target for an experimental ADS reactor of ~30 MW with sub-criticality (k) of 0.975 is presented. The high energy beam consists of 650 MeV and 0.9 mA proton beam. The circulation of the liquid metal is based on gas lift method. Extensive numerical simulations have been carried out to optimise the target geometry, LBE/gas flow rate, beam parameters, neutron yield etc. This paper also includes time dependent two phase CFD analysis to study the effect of nitrogen gas flow rate on LBE flow rate, 3D thermal-hydraulic studies of liquid metal flow near the window and spallation region. The optimum asymmetric flow geometry at the bottom of the target to shift the stagnation zone to minimize the window temperature and estimation of thermo mechanical stress in the window has been carried out. In addition, spallation neutron generation and their energy spectrum, heat deposition distribution, spallation products and their activities have been estimated using high energy particle transport code FLUKA.

Keywords: Accelerator driven sub-critical System (ADS); Lead-bismutheutectic (LBE); Neutron spallation target; FLUKA; CFD; Window; Gas injection system; Two-phase flow; Water cooled safety jacket; Spallation radioactive products; Neutron yield; High energy proton beam; MPRR; LINAC

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