It marks the first long-term, stable operation of the technology, putting China at the forefront of a global race to harness thorium – considered a safer and more abundant alternative to uranium – for nuclear power.
The experimental reactor, located in the Gobi Desert in China’s west, uses molten salt as the fuel carrier and coolant, and thorium – a radioactive element abundant in the Earth’s crust – as the fuel source. The reactor is reportedly designed to sustainably generate 2 megawatts of thermal power.
Thorium is a great nuclear fuel. Much much safer than the uranium we currently use, because the reaction works best only within a narrow temperature band. Unlike uranium which can run away, a thorium reactor would become less efficient as it overheats possibly preventing a huge problem.
That means the fuel must be melted into liquid to achieve the right temperature. That also provides a safety mechanism, you simply put a melt plug in the bottom of the reactor so if the reactor overheats the plug melts and all the fuel pours out into some safe containment system. This makes a Chernobyl / Fukushima style meltdown essentially impossible.
There are other benefits to this. The molten fuel can contain other elements as well, meaning a thorium reactor can actually consume nuclear waste from a uranium reactor as part of its fuel mix. The resulting waste from a thorium reactor is radioactive for dozens or hundreds of years not tens of thousands of years so you don't need a giant Yucca Mountain style disposal site.
And thorium is easy to find. Currently it is an undesirable waste product of mining other things, we have enough of it in waste piles to run our whole civilization for like 100 years. And there's plenty more to dig up.
There are challenges though. The molten uranium is usually contained in a molten salt solution, which is corrosive. This creates issues for pipes, pumps, valves, etc. The fuel also needs frequent reprocessing, meaning a truly viable thorium plant would most likely have a fuel processing facility as part of the plant.
The problems however are not unsolvable, Even with current technology. We actually had some research reactors running on thorium in the mid-1900s but uranium got the official endorsement, perhaps because you can't use a thorium reactor to build bombs. So we basically abandoned the technology.
China has been heavily investing in thorium for a while. This appears to be one of the results of that investment. Now this is a tiny baby reactor, basically a lab toy, a proof of concept. Don't expect this to power anybody's house. The point is though, it works. You have a 2 megawatt working reactor today, next you build a 20 megawatt demonstrator, then you start building out 200 megawatt units to attach to the power grid.
Obviously I have no crystal ball. But if this technology works, this is the start of something very big. I am sure China will continue developing this tech full throttle. If they make it work at scale, China becomes the first country in the world that essentially has unlimited energy. And then the rest of the world is buying their thorium reactors from China.
On most of the fediverse, I find discussions really great with no idiots/trolls... apart from technology. Here it seems some get triggered by any tech from outside the US.
This announcement would be seen as a massive breakthrough anywhere else. China has its problems, I'm fully aware of the red flags and government influence. But only a fool would question their technological advances at this point. They are moving ahead at lightning speed, especially in energy and battery tech.
Even on the consumer side, Huawei invested more in R&D last year than Samsung or Intel. Huawei consumer division could have been expected to be dead by now with the chip ban, yet survived and are thriving again. Not because the Chinese were forced to by their phones, Apple still sell in China, but because they innovated like hell. A Chinese buyer has the option today of buying a tri-folding tablet phone with super fast charging or an American designed device with 3 year old tech (chip aside). Americans don't have that choice.
Its also the reason why traditional European car brands are tanking in China. VW can no longer expect to sell on prestige alone. Here in Britain, our consumer tech offering is already almost non existent. We no longer have a true British owned car company. Our famous Mini was sold to the Germans. Jaguar/Range Rover to the Indians. MG to the Chinese. Its depressing. But I do feel fortunate to at least have choice (we can buy a BYD or Xiaomi here) and that I'm not subject to only American tech reporting. BYD will later this year have 7 different car models on sale in Britain vs 6 (soon to be 5) from Ford. This is a paradigm shift, considering for almost the last 20 years Ford had at least 2 cars in the top 5 best sellers in the UK.
Apologies for going off on one. But i'd highly recommend US readers check out Chinese tech sites from time to time (eg carnewschina/huawei central etc) rather than just relying on the verge. Sure not all Chinese tech will be successful, sure some designs may be clones, but the shear scale of investment from China will make them unstoppable. I believe the changing of the guard happened a while ago, where about to see it play out in all industries...
Me opening the comment section knowing that its just gonna be a bunch of racism... like i get it i hate the chinese government as well but give credit to the millions of scientists and people who are actually trying to make life better on this earth. If something isnt american, it can still be nice to have.
it should perhaps be pointed out that we originally had proposition for both reactors but we ended up with uranium reactors because the US wanted a reason to mine uranium for nuclear bombs and were well aware of the risk difference but didn't care about the potential lives being lost if something went wrong. later, the cost to develop a thorium reactor had no monetary benefits beyond generating power and keeping people safe so no country wanted to invest in it when the uranium blueprints were available, literally because of capitalism.
Too bad we do not know which exactly thorium salt mixes they are using, what the materials facing the molten salt at high neutron fluxes are and how they fare long term, whether they use on-site constant or batched fuel reprocessing, whether they kickstarted the reactor with enrichened uranium or reactor-grade plutonium waste and other such questions.
US experiments were broken off because of materials corrosion problem.
Good news, mankind should be pushing farther into this technologies.... so we finally have our first gen IV reactor? I honestly thought we would never reach them on time.