Chinese government scientists have revealed plans to activate the world’s first clean nuclear reactor that does not need water for cooling.
According to LiveScience report, the molten-salt nuclear reactor will runs on liquid thorium rather than uranium since this is safer than traditional reactors because the molten salt cools and solidifies quickly when exposed to the air, insulating the thorium so that any potential leak would spill much less radiation into the surrounding environment compared with leaks from traditional reactors.
The prototype reactor is expected to be completed next month, with the first tests beginning as early as September. This will pave the way for the building of the first commercial reactor, slated for construction by 2030.
The technology should not only be kinder to the environment but mitigate some political controversy. Conventional uranium reactors produce waste that stays extremely radioactive for up to 10,000 years, requiring lead containers and extensive security. The waste also includes plutonium-239, an isotope crucial to nuclear weapons. They also risk spilling dramatic levels of radiation in the event of a leak, as seen in Chernobyl. They also need large volumes of water, ruling out use in arid climates.
Thorium reactors, however, dissolve their key element into fluoride salt that mostly outputs uranium-233 you can recycle through other reactions. Other leftovers in the reaction have a half-life of ‘just’ 500 years — still not spectacular, but much safer. If there is a leak, the molten salt cools enough that it effectively seals in the thorium and prevents significant leaks. The technology doesn’t require water, and can’t easily be used to produce nuclear weapons. You can build reactors in the desert, far away from most cities, and without raising concerns that it will add to nuclear weapon stockpiles.
China is accordingly building the first commercial reactor in Wuwei, a desert city in the country’s Gansu province. Officials also see this as a way to foster China’s international expansion — it plans up to 30 countries participating in the company’s “Belt and Road” investment initiative. In theory, China can extend its political influence without contributing to nuclear arms proliferation.
That might worry the US and other political rivals that are behind on thorium reactors. The US-based Natrium reactor, for instance, is still in development. Even so, it might go a long way toward fighting climate change and meeting China’s goal of becoming carbon neutral by 2060. The country is still heavily dependent on coal energy, and there’s no guarantee renewable sources will keep up with demand by themselves. Thorium reactors could help China wean itself off coal relatively quickly, especially small-scale reactors that could be built over shorter periods and fill gaps where larger plants would be excessive.