2025-06-27|IEEE Future Tech Forum: Micro-Nuclear Energy: A National Strategic Technology Imperative to Secure CanadaÕs Arctic Sovereignty

Mr. Peter Lang

I watched your thought-provoking presentation "Micro-Nuclear Energy: A National Strategic Technology to Secure Canada's Arctic Sovereignty" (2025-06-18) with emphasis on simplicity.
- Coolant: liquid metal
- Moderator: graphite
What is the advantage of Rankine cycle over Brayton cycle in SEALED PASSIVE HEAT PIPE[S]?
- Westinghouse's eVinci Microreactor: open-air Brayton cycle generator
- Dunedin's CANADIAN THERMAL BATTERY: ORGANIC RANKIN[E] CYCLE GENERATOR
The presentation mentioned non-H2O working fluid, but what are they?
- Primary cooling: sodium (Na) or potassium (K)?
- Secondary cooling: what organic fluid? could it be carbon dioxide (CO2)??

Has Magnetohydrodynamic (MHD) electric-power generation been considered/explored? An MHD generator on the primary cooling makes the secondary cooling unnecessary?

Magnetohydrodynamic (MHD) Coupling: "High-temperature liquid-metal heat pipes can feed thermal energy into a liquid metal loop that flows through a strong magnetic field to produce direct-current electricity via Faraday's Law without moving mechanical parts."

Could certain configuration with in situ arrangement of fuel bundles and moderator enable breeder action by directing fast neutrons from U-235 onto U-238 -> U-239 -> Np-238 -> Pu-238 so that refuelling cycle could become even longer than "20+ years", while reducing the amount of spent fuel?

ARC-100: "because its coolant is liquid sodium instead of water, its "fast" neutrons have much more energy, giving it the capacity to be fuelled with and recycle its own used fuel."
TerraPower: "The traveling wave reactor is designed to "burn" the fuel it breeds in situ, without requiring its removal from the reactor core or further reprocessing."

Dunedin's website says "TWO-UNIT GENERATING STATION". If the system can be expanded modularly (i.e., 2 units, 3 units, 4 units, etc.), then "MULTI-UNIT GENERATING STATION" would be more appropriate.
Thank you very much for your attention.

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"Sunatori, Go Simon" <GS.Sunatori@HyperInfo.CA>

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2026-08-30T01:02:24.000Z