Oklo demonstrates fuel recycling process

Oklo said the completion of the demonstration "marks a significant step forward in Oklo's efforts to scale up its fuel recycling capabilities and deploy a commercial-scale recycling facility to increase advanced reactor fuel supplies, and enhance fuel cost effectiveness".

Supported by a USD5 million cost-share award from the US Department of Energy's Advanced Research Projects Agency-Energy (ARPA-E) under the Optimizing Nuclear Waste and Advanced Reactor Disposal Systems (ONWARDS) Program, this project aims to facilitate the deployment of a commercial-scale advanced fuel recycling facility.

Oklo's fuel recycling technology is engineered to extract more than 90% of the remaining potential energy from used fuel, which is expected to be utilised in Oklo powerhouses to generate clean energy. It incorporates unique proliferation-resistant features, including maintaining the consolidation of transuranic materials.

The company said the introduction of commercial fuel recycling operations is expected to save up to 80% on its fuel costs, driving long-term value through enhanced fuel efficiency, alternative fuel source creation, and reduction in high-level waste requiring permanent disposal.

"We recognise the inherent opportunity to enhance our mission through fuel recycling, converting used fuel into clean energy," said Oklo co-founder and CEO Jacob DeWitte. "Oklo's use of fast fission technology positions us well to realise these fuel recycling benefits. The success of this project brings us closer to bringing a commercial-scale domestic fuel recycling facility online, crucial for strengthening our business model and advancing economic viability."

ARPA-E Director Evelyn Wang added: "We know that recycling is an important path to reduce high-level waste, and advance nuclear energy with safe and sustainable domestic fuel stocks. Through ARPA-E's ONWARDS Program, Oklo is working to achieve these goals. This milestone marks an important step forward in the team's progress as they work towards economically viable nuclear fuel recycling."

In January 2023, Oklo submitted a Licensing Project Plan to the US Nuclear Regulatory Commission (NRC), outlining its plans for pre-application engagement activities that support the future licensing of a commercial-scale nuclear fuel recycling facility.

Oklo, founded in 2013, plans to commercialise its liquid metal fast reactor technology with the Aurora 'powerhouse', a fast neutron reactor that uses heat pipes to transport heat from the reactor core to a supercritical carbon dioxide power conversion system to generate electricity. The powerhouse uses metallic high-assay low-enriched uranium, or HALEU, fuel to produce about 15 MWe as well as producing usable heat.