DFR: the Dual-Fluid Reactor - Jan-Christian Lewitz @ ThEC2018

Why is the DFR not an MSR?
DFR is two-fluid while most MSR single fluid.
DFR has heterogeneous core vs MSR homogeneous core.
DFR removed heat with second fluid while MSR uses salt.
DFR fuel liquid less constrained while MSR fuel limited to salt.

The double function of fuel providing and heat removal in the MSR limits its power density. This limitation is not present at the DFR.

DFR Control:
- Highly negative temperature coefficient due to thermal expansion of the liquid fuel. Temperature rises → Fission rate and heat production drop. Temperature drops → Fission rate and heat production rise.
- temperature is held homeostatic at 1000 °C→ no material stress on power change.
- power is fully regulated by heat extraction→ Load-following operation in the grid.
- qualified for rapidly changing power demand in chemical plants (process heat).
- No mechanical regulation equipment needed
- DFR can be on "stand by" in a critical state at zero power output → Safe operation mode.

Problem → Solution:
- Risk of leakages → No overpressure, survey and containment without much effort.
- More volatile activity due to high operating temperature and liquid fuel → Will be extracted/absorbed in the online fuel processing, containment.
- Raised proliferation risk due to online fuel processing → Fixed piping, encapsulation and monitoring is easier to accomplish due to compact size.

Nuclear reactor including a primary duct for continuous insertion and discharge of liquid fuel into and out of a core vessel wherein the fuel duct is lead through the core vessel, characterized by
a secondary duct for a liquid coolant wherein the coolant enters the aforementioned core vessel via an inlet, passing and bathing the primary duct and leaving the core vessel via an outlet.

Learn more at: https://dual-fluid-reaktor.de/

This talk was captured at Thorium Energy Conference 2018 (ThEC2018) in Brussels, Belgium. The footage may be recycled by https://ThoriumRemix.com/ for narrative purposes. Thorium Energy (World) conferences can be found here: http://www.thoriumenergyworld.com/

ThEC2018 videos are collected in this ThEC2018 Playlist: https://www.youtube.com/playlist?list=PLKfir74hxWhPll2rp9pJO2oiCceFccHls

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