Prismatic (or cylindrical) TRISO also makes sense. There are lots of potential problems using pebble beds (circulation, grinding), whereas doing regular refuelling cycles avoids them, in exchange for down-time to refuel.
To add a bit of context there were 11 companies participating in program and only 2 achieved critiality, and the deadline included in "DOE Reactor Pilot Program" was "July 4, 2026", and Aalo Atomics is the only one that might also make it in time.
China does: all of the above, where it makes sense.
Renewables and batteries to keep your AC, workplace EV charger, stove, pool heater and (since recently) green ammonia producer going, nuclear to prevent e.g. aluminium smelters from seizing up.
Also the cheapest way to make renewables work 24/7 is to build HVDC lines - they cost as much as a highway per unit length and even undersea cables would deploy for less and faster than equivalent nuclear.
The total length of HVDC lines just in China is currently more than 40k km, so they've literally deployed enough of them to wrap around the globe.
If your location already has a well-run nuclear energy sector (Finland, Sweden, South Korea): invest in nuclear energy.
If you don't: stick to renewables.
And it also depends on what you mean by "we". As a Dane, I don't think us Danish taxpayers should invest in nuclear energy, but I'm perfectly happy that private Danish investors invest in Seaborg/Saltfoss and Copenhagen Atomics.
> "The Trump administration is proud to support the rebirth of America’s nuclear industry and ensuring Americans have access to affordable, reliable and secure energy for generations to come."
> "The demonstration and the licensing pathway it establishes represent a key step toward deploying electricity-producing microreactors for U.S. military installations by September 30, 2028."
So which is it? Power to the people or power to the military? This microreactor concept doesn't seem very well suited for commercial use.
Why would microreactor concepts not be suitable for commercial use? History is overwhelmed with examples of large, rare and expensive tech being produced in small cheap packages and becoming massive commercial successes that make the old way look primitive.
Because large scale production is generally more scalable and efficient. And you probably don't want dozens of "microreactors" scattered across cities.
A nuclear reactor is generally treated as a high security facility. I don't know how this new reactor works but I thought it was safe to assume something like a terrorist attack on one might be bad. It's also a lot more work to inspect and control them when scattered.
I think that may be exactly wrong. The small scale may make it easier for a reactor to be “walk away safe” ie shut itself down absent external activity. I know that is a design goal of some of the Chinese micro reactors and those are used for civilian power generation.
Secondly although generating large amounts of power is more efficient in terms of generation, generating power close to the point of use is significantly more efficient in terms of power loss on the grid as I understand it.
Large scale production of commodity goods is generally more efficient. Which is why microreactors don't seem to have any inherent disadvantages. The efficiencies tend to kick in with the raw number of items produced.
On the other hand you can scale production of reactor themselves. And I don't think the idea is to scatter them around, but to have a power plant with dozens of them in one place (instead of 3-4 regular reactors in a regular nuke power plant).
Great to see engineering deliver on time. I wonder if Rolls Royce will also have a smooth ride. It's a PWR.
Should we double down on renewable energy and solve its issues with lots of batteries or should we invest in next generation nuclear energy?
Both at the same time?
Does anyone know?
Renewables and batteries to keep your AC, workplace EV charger, stove, pool heater and (since recently) green ammonia producer going, nuclear to prevent e.g. aluminium smelters from seizing up.
Also the cheapest way to make renewables work 24/7 is to build HVDC lines - they cost as much as a highway per unit length and even undersea cables would deploy for less and faster than equivalent nuclear.
The total length of HVDC lines just in China is currently more than 40k km, so they've literally deployed enough of them to wrap around the globe.
If you don't: stick to renewables.
And it also depends on what you mean by "we". As a Dane, I don't think us Danish taxpayers should invest in nuclear energy, but I'm perfectly happy that private Danish investors invest in Seaborg/Saltfoss and Copenhagen Atomics.
Do it all.
https://unece.org/sites/default/files/2022-04/LCA_3_FINAL%20...
I think a low carbon mix will result in the cheapest, most reliable and cleanest energy grid.
> "The demonstration and the licensing pathway it establishes represent a key step toward deploying electricity-producing microreactors for U.S. military installations by September 30, 2028."
So which is it? Power to the people or power to the military? This microreactor concept doesn't seem very well suited for commercial use.
Rooftop solar is an example of small scale decentralized energy production, maximum efficiency is not the only relevant metric.
> And you probably don't want dozens of "microreactors" scattered across cities
Why not? If they're considered safe and pass all inspections, what's the problem?
Rooftop solar does not have these issues.
Secondly although generating large amounts of power is more efficient in terms of generation, generating power close to the point of use is significantly more efficient in terms of power loss on the grid as I understand it.