Optimisation of the Flow Path in a Conceptual Pool Type Reactor under Natural Circulation with Lead Coolant

• This contribution investigates the eects of a bypass flow blocking bottom plate and the influenceof the heat transfer between the hot and cold leg in a small pool type reactor cooled throughnatural convection with lead coolant. The computations are carried out using 3D computationalfluid dynamics, where small-detail parts, such as the core and heat exchangers are modeled usinga porous media approach. The introduction of full conjugate heat transfer shows that the heattransfer between the hot and cold leg can deteriorate flow in the cold leg and lead to recirculationzones. These zones become even more pronounced with the introduction of a bottom plate, whichon the other hand also increases the flow through the core and lowers the maximum temperature inthe core by approximately 150 K. Based on the results, redesign suggestions for the bottom plateand the internal wall are made.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Energiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Energy Engineering (hsv//eng)

Nyckelord

heavy liquid metal

thermal-hydraulics

CFD

turbulence model

GEN IV

Energy Technology

Energiteknik

Publikations- och innehållstyp

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