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Science & Technology
Japan Installs first Operating Micro Nuclear Reactor
2025-07-12
[MINnews] It was jointly developed by a private consortium and the National Institute of Fusion Science of Japan, using molten salt cooling and ceramic-based low- enriched uranium fuel, integrating power generation, control, and heat dissipation, and packaged in a standard 40-foot container for easy transportation by truck or ship.

It is buried underground after being deployed on site, requiring no external operation, and can be called a "maintenance-free nuclear battery " version.

Design concept: small size, high energy, autonomous safety Traditional commercial nuclear power plants are large in size, have a long construction period, and are highly dependent on geology and water sources.

The "Armor" microreactor is 3 meters high, 4 meters wide, weighs less than 40 tons, has a thermal power of 1 megawatt, and can convert about 0.5 megawatts of electricity, continuously providing electricity for the town for decades.,
[granted that 500KW is only enough to serve a small say 500 population town - this is still a great achievement]
Its core and molten salt coolant are chemically stable, with low operating pressure, no active cooling circuit required, and can be passively shut down once the power is off, completely eliminating the risk of meltdown.

Posted by:Lord Garth

#4  500 kilowatts for 10 years. That supplies ~44 GWH (GigaWatthours) of energy.
Posted by: Difar Dave   2025-07-12 21:55  

#3  Stand by for real fusion. Some adjustments required, or suggested. Low voltage households anyone?
Posted by: Whiskey Mike   2025-07-12 17:26  

#2  500KW is only enough to serve a small say 500 population town

Japanese homes are usually pretty energy efficient (and small by western standards). The newer homes use split system AC and water heating, so no big motors. Gas stoves & ovens are typical.

So '500 population' should really say '500 homes'.
Posted by: Mullah Richard   2025-07-12 07:25  

#1  New nuclear clean energy agreement with Kairos Power [and Google]

Posted by: Skidmark   2025-07-12 01:17  

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