Key commissioning tests completed at Changjiang 4

Cold functional tests on Changjiang unit 4 have been completed, confirming that safety-critical components and primary circuit systems are leak-tight and ready for operation. The reactor, a Hualong One design, has progressed through a series of pressure tests up to 22.3 MPa and is now entering the commissioning phase ahead of hot functional testing, fuel loading, and grid connection. Unit 3 at the same site achieved criticality in July and connected to the grid in August. Both units are expected to be fully operational in early 2027, representing a CNY40 billion investment by China Huaneng and partners.

Where this fits

This is a data point in the global nuclear build, concentrated in China and allied nations. While Australia debates energy policy, China is adding firm, low-emission capacity at scale and speed. The Hualong One design is being replicated across the Indo-Pacific and Middle East. Changjiang 3 and 4 will operate for decades as baseload power with zero carbon emissions and minimal lifecycle impact. Australia, by law, cannot pursue the same path. The firm-power alternative to a renewables-plus-gas grid remains off the table, even as the cost and material footprint of the solar-and-battery transition compound.

What it means

China is consolidating energy sovereignty and manufacturing dominance in the technology that delivers firm, low-emissions power. Meanwhile, Australia remains locked into a grid architecture that depends on imported battery metals, China-made solar panels and inverters, and gas firming for weather-dependent renewables. The operational success of new nuclear units elsewhere underscores what is being foregone: a domestic, dispatchable, low-material alternative that would reduce strategic dependence and grid risk.