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SUMMARY:Micro-heterogeneous ThO2-UO2 Duplex Fuel: Wizardry of Thorium for 
 Long Life SMR - Syed Bahauddin Alam (University of Cambridge)
DTSTART:20170515T100000Z
DTEND:20170515T110000Z
UID:TALK105955@talks.cam.ac.uk
CONTACT:Syed Bahauddin Alam
DESCRIPTION:Micro-heterogeneous fuel geometries is a compromise position b
 etween homogeneous and heterogeneous approaches and can be achieved in mic
 ro-heterogeneous ThO2-UO2 duplex fuel. In this concept\, the uranium and t
 horium components are not blended and are discretely interspersed on very 
 small distance scales. For instance\, an individual fuel pin might be comp
 osed of a uranium centre surrounded by an annulus of thorium in a typical 
 PWR fuel pin geometry. Previous studies found that the spatial separation 
 between the fissile U-235 and the fertile thorium enables better moderatio
 n of the fission neutrons before they interact with the thorium. This spec
 tral shift encourages neutron absorption in the thorium component of the f
 uel at the beginning of life\, helps controlling reactivity and promotes b
 reeding of new fissile material U-233. A limited number of studies of dupl
 ex fuel are available in the public domain\, but its use has never been ex
 amined in the context of an SBF environment for a long-life core. Therefor
 e\, we will assume duplex fuel\, loaded with a single-batch strategy and a
 ssess its feasibility in a series of reactor physics simulations. This tal
 k will describe the underlying physics of this exotic fuel candidate.
LOCATION:Sir Arthur Marshall Room\, Engineering Design Centre\, CUED
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