Instead of focusing only on feeding electricity into the grid, this new site is being built from day one to act as a giant low‑carbon boiler for heavy industry, while still delivering power to millions of homes.
China’s Xuwei project aims to change what a nuclear plant is for
The Xuwei nuclear project, in the Lianyungang area of Jiangsu province, is not a routine addition to China’s huge reactor fleet. It combines three reactors on a single site, designed to work together as one integrated energy system.
- Two Hualong One pressurised water reactors, each rated at about 1,208 MW of electricity
- One high‑temperature gas‑cooled reactor (HTGR) of 660 MW electric output
Hualong One represents China’s flagship “generation III” design. The gas‑cooled unit belongs to “generation IV”, a family of advanced concepts meant to push nuclear technology beyond today’s standard water‑cooled machines.
Xuwei is billed as the first site on Earth to merge a gen‑III water‑cooled reactor and a gen‑IV high‑temperature reactor in a single, tightly coupled industrial energy hub.
The owner, China National Nuclear Corporation (CNNC), portrays Xuwei as a demonstration not just of engineering, but of a different way to think about nuclear energy: less as a power station, more as a multi‑purpose thermal engine for industry.
How the plant turns nuclear heat into an industrial workhorse
Heat used twice before it leaves the site
At Xuwei, the clever bit sits not in the reactors themselves, but in how the heat they generate is routed and re‑used.
Demineralised water will first be heated by steam coming from the Hualong One reactors. That creates saturated steam at a temperature and pressure still below what many heavy industrial processes need.
This steam then passes through a second stage, where it is reheated using the primary steam from the high‑temperature gas reactor. The HTGR operates at much higher temperatures than a conventional pressurised water reactor, which allows the combined system to hit industrial‑grade heat levels.
By sending steam through both reactor systems, Xuwei is set up to deliver very hot process steam while still maintaining a robust flow of electricity to the grid.
➡️ People who barely speak to their siblings as adults often share nine childhood patterns that quietly shaped their relationships
➡️ Why electricity‑free pellet stoves are winning over more and more households in France
➡️ Marine biologists warn of a troubling shift in orca interactions with vessels
➡️ Shifting: why this practice is increasingly popular with teenagers
➡️ New psychology research divides experts as people who clean while they cook are accused of being judgmental and emotionally rigid
➡️ 9 things every senior did as a child that we no longer teach our grandchildren
➡️ Couple arguments: your brain treats them like a real threat
➡️ Buried under 2 km of Antarctic ice, scientists discover a lost world 34 million years old – but should we fear what they might awaken?
This stepwise approach offers flexibility. Operators can adjust how much heat goes to industrial users versus the turbines that generate electricity, depending on demand in the local region.
A plant designed for factories first, grid second
Unlike most nuclear stations, which mainly aim to maximise electricity output, Xuwei has been sized around the needs of nearby factories.
Once in operation, the site is expected to supply around 32.5 million tonnes of industrial steam each year. That steam will feed petrochemical complexes, chemical plants and other heavy industries clustered around Lianyungang, one of China’s major coastal industrial hubs.
On the power side, the three reactors together should generate more than 11.5 billion kilowatt‑hours annually. That’s comparable to the yearly consumption of several million typical Chinese households, even as the steam lines supply local industry directly.
Climate numbers that Beijing wants the world to notice
Beijing now publishes fairly granular climate figures for its big energy projects, and Xuwei is no exception.
- Coal use avoided each year: about 7.26 million tonnes of “standard coal”
- Carbon dioxide emissions avoided: around 19.6 million tonnes per year
Those numbers reflect not just cleaner electricity, but also cleaner heat. At present, many Chinese factories rely on coal‑fired boilers or captive coal plants to generate steam for processes such as refining, cracking, and chemical synthesis. Replacing that with nuclear heat slashes local pollution alongside CO₂.
Big contracts and a tightly controlled construction effort
China has not left the build‑out of such a complex system to chance. Construction responsibility went in 2025 to a consortium including China Energy Engineering Jiangsu Electric Power Construction No.3 and China National Nuclear Huachen Construction Engineering.
The main contract, worth roughly €560 million, covers the non‑nuclear “conventional islands” of all three reactors, plus auxiliary buildings and part of the equipment outside the reactor cores themselves.
Project ownership sits with CNNC Suneng Nuclear Power Company, a dedicated subsidiary set up to finance, build and operate Xuwei. That sort of vertical integration is typical of China’s recent reactor builds, and helps keep design tweaks and supply chains under tight central control.
One project inside a much larger Chinese nuclear push
Xuwei is not a standalone gamble. It is one of 11 new reactors approved by China’s State Council in August 2024, signalling that Beijing sees nuclear energy as a central tool for cutting coal use while keeping industrial growth on track.
The site stands next to the existing Tianwan nuclear plant, which CNNC already operates. The proximity lets the operator share staff, construction facilities and grid connections, and even coordinate maintenance schedules across multiple units.
China is no longer trialling new nuclear ideas on one‑off demonstrators; it is welding them straight into major industrial zones.
This strategy contrasts with the slower, more fragmented approach in Europe and North America, where advanced nuclear designs are often confined to pilot projects, paper studies or small research reactors.
Why Xuwei is still unique despite other nuclear heat projects
Who already uses nuclear heat?
Several other countries already tap nuclear reactors for heat, although usually on a smaller scale or for district heating.
| Site / project | Country | Main use of heat | Special feature |
| Xuwei | China | Large‑scale industrial steam and electricity | Gen‑III PWR + gen‑IV HTGR on one integrated site |
| Shidaowan (HTR‑PM) | China | Power generation, potential future process heat | First commercial pebble‑bed HTGR |
| Haiyang | China | Urban heating for nearby city | Pressurised water reactor feeding district heating network |
| Bilibino | Russia | Electricity and local heating in Arctic region | Old graphite reactors nearing retirement |
| HTTR | Japan | Experimental high‑temperature process heat tests | Research reactor, no commercial power |
What sets Xuwei apart is not the simple notion of using nuclear heat, but the deliberate coupling of two reactor generations on one site, with the system engineered from scratch for commercial‑scale industrial steam delivery as a co‑product, not a side benefit.
What is a high‑temperature gas‑cooled reactor, in plain terms?
High‑temperature gas‑cooled reactors work very differently from classic water‑cooled designs. Instead of water, they use a gas such as helium to carry heat away from the reactor core. The fuel often comes in the form of small “pebbles” or coated particles, each wrapped in multiple ceramic layers.
Those ceramic coatings act as mini‑containments around each fuel grain. They let the reactor run at far higher outlet temperatures while keeping radioactive materials locked in. High temperatures are precisely what energy‑hungry industrial processes need for tasks like hydrogen production, synthetic fuel manufacturing, or high‑grade chemical synthesis.
What this could mean for heavy industry and net zero plans
If Xuwei works as promised, it could offer a template for cutting emissions in sectors that are hard to clean up with wind turbines and solar farms alone. Petrochemicals, fertiliser production, plastics, and refining all depend on steady, high‑temperature heat rather than just electricity.
In principle, a site like Xuwei can replace the coal or gas boilers that currently generate that heat, while keeping local power supplies stable. For countries chasing net zero goals, the approach hints at a route to decarbonise not just the grid, but also factory chimneys.
There are risks and open questions. Integrating multiple advanced reactor types on one site complicates safety analysis and operations. Industrial customers must trust that steam supplies will remain reliable for decades. Public acceptance of nuclear‑powered chemical plants may vary sharply from region to region.
Yet the potential upside is large. If nuclear heat can be priced competitively against fossil fuels, heavy industry gains a low‑carbon option that does not depend on rare weather patterns or vast new land use. Other countries are already watching China’s move, running their own studies on nuclear‑heated hydrogen, synthetic fuels and district heating networks.
The next test will not only be whether Xuwei is built on schedule, but whether its model of a nuclear‑industrial cluster proves robust enough to copy in other coastal and inland hubs worldwide.