In our continuing effort to explore what’s next for nuclear, we turn this week to the recent announcement that China will begin construction on a 600 MWe fourth generation fast neutron reactor. While details of the project are few, there is speculation that this project may be the first successful partnership between China and TerraPower, the Washington state based energy firm founded and chaired by Microsoft co-founder and philanthropist Bill Gates.
In this week’s News in Depth, we will take a look at the technology behind fourth generation fast neutron reactors, the story of TerraPower, and China’s efforts to be at the forefront of nuclear energy development and deployment.
Next Generation Technology
As the World Nuclear Association (WNA) notes, fourth generation fast neutron reactors (FNRs) have been in development for decades. As of 2010, over 400 reactor-years of operation have been logged with approximately 20 reactors in different periods. The WNA also provides a useful summary of the initial motivation behind FNR tech:
The FNR was originally conceived to burn uranium more efficiently and thus extend the world’s uranium resources – it could do this by a factor of about 60. From the outset, nuclear scientists understood that today’s reactors fuelled essentially with U-235 exploited less than one percent of the energy potentially available from uranium. Early perceptions that those uranium resources were scarce caused several countries to embark upon extensive FBR [Fast Breeder Reactor] development programs.
The technology is incredibly complex, but for reference note that
Natural uranium contains about 0.7% U-235 and 99.3% U-238. In any reactor some of the U-238 component is turned into several isotopes of plutonium during its operation. Two of these, Pu-239 and Pu-241, then undergo fission in the same way as U-235 to produce heat. In a FNR this process is optimized so that it ‘breeds’ fuel. Some U-238 is burned directly with neutron energies above 1 MeV.
Image Source: TerraPower
China’s New Project
According to the WNA, China first began research FNR reactors in 1964 and, in 2003, built “a 65 MWt fast neutron reactor – the Chinese Experimental Fast Reactor (CEFR) – … near Beijing [in partnership with] Russia’s OKBM Afrikantov [and] OKB Gidropress, NIKIET and Kurchatov Institute.”
This new project is part of China’s efforts to have, according to CIAE projections, fast reactor capacity progressively increasing from 2020 to at least 200 GWe by 2050, and 1400 GWe by 2100. As noted in the opening, TerraPower’s involvement in the project is still unconfirmed, but industry and media sources seem to be coalescing around such a partnership as Gates himself recently travelled in February of this year to China to meet with “with Nur Bekri, a vice chair of China’s National Development and Reform Commission, and with China National Nuclear Corp chairman Sun Qin.”
In any event, what we are seeing here are the early stages of what looks like a new phase in nuclear technology. 4th Generation reactors – in this case, sodium FNRs – have been in development for over a decade and now we are seeing an example of one of the these new designs taking shape. Development is slow, yes, but it is happening and happening at in increasing pace in China. We can only now wait to see what comes next and, hopefully, to see confirmation that this project marks the first partnership between China and Gate’s TerraPower.