NANO Nuclear advances its portable reactor thanks to the GAIN program

NANO Nuclear receives support from the U.S. Department of Energy for its portable 'ZEUS' reactor, with technical collaboration from Idaho National Laboratory.

Share:

Comprehensive energy news coverage, updated nonstop

Annual subscription

8.25$/month*

*billed annually at 99$/year for the first year then 149,00$/year ​

Unlimited access • Archives included • Professional invoice

OTHER ACCESS OPTIONS

Monthly subscription

Unlimited access • Archives included

5.2$/month*
then 14.90$ per month thereafter

FREE ACCOUNT

3 articles offered per month

FREE

*Prices are excluding VAT, which may vary depending on your location or professional status

Since 2021: 35,000 articles • 150+ analyses per week

NANO Nuclear Energy is benefiting from the U.S. Department of Energy’s (DOE) GAIN (Gateway for Accelerated Innovation in Nuclear) program to further develop its portable nuclear reactor, dubbed ‘ZEUS’.
The reactor, designed to operate without a coolant, uses an open-air Brayton cycle to dissipate the heat generated by the reactor core.
This technology could offer a compact, reliable energy solution for isolated areas or specific industrial applications.
The collaboration between NANO Nuclear and Idaho National Laboratory (INL) focuses on the evaluation and optimization of a key reactor component: the heat exchanger.
This partnership aims to model the thermodynamic behavior of the device to ensure efficient energy management.
This step is crucial to validate the viability of this technology before its possible commercialization.

The role of the GAIN program in supporting innovation

The GAIN program was set up by the DOE to accelerate innovation in the nuclear field by providing technical, regulatory and financial support to companies in the sector.
The vouchers awarded by this program enable companies to collaborate with DOE laboratories, such as INL, to overcome technological obstacles.
For NANO Nuclear, this collaboration is aimed at developing simulation tools capable of modeling heat exchanger performance.
Unlike direct funding, GAIN vouchers finance DOE laboratories, which contribute their expertise and technical resources to help companies achieve critical milestones in the development of their innovations.
This type of support is essential for technologies such as the ‘ZEUS’ micro-reactor, which require rigorous validation before they can be integrated into industrial applications.

Technical advances and prospects for the ‘ZEUS’ reactor

The ‘ZEUS’ reactor stands out for its ability to generate between 1 and 2 MW of electricity without the use of heat transfer fluids.
This micro-reactor concept aims to offer a portable, compact and easily deployable energy solution.
One of the key innovations of this technology is the heat exchanger, designed to operate with an open-air thermodynamic cycle.
This component enables the reactor to be maintained at optimum operating temperatures, while limiting the complexity and size of the system.
The partnership with INL will enable this design to be validated through detailed simulations and performance analyses.
These assessments are essential to ensure that the reactor can operate under real-life conditions, particularly in environments where decentralized, rapidly deployable energy solutions are required.
This technology could, for example, be used in rural areas or industrial environments requiring a secure, continuous power supply.

A strategic partnership with INL

INL’s expertise in nuclear technology assessment makes it an ideal partner for NANO Nuclear.
The laboratory has already collaborated with the company on previous projects, including the evaluation of the preliminary design of the ‘ODIN’ micro-reactor.
This working relationship has strengthened the technical credibility of NANO Nuclear’s projects, while providing independent validation of their technologies.
As part of the GAIN voucher, INL will develop a computer model to simulate the thermal performance of the heat exchanger.
The model will analyze energy flows, interactions between the reactor and the heat exchanger, and heat dissipation.
This information will enable NANO Nuclear to fine-tune its design before moving on to the next stage of development.

Outlook for the nuclear sector

The GAIN program and its initiatives in support of miniaturized nuclear technologies are part of a broader strategy of innovation in the US energy sector.
The ability to provide decentralized, modular and easily transportable energy solutions such as the ‘ZEUS’ micro-reactor opens up new prospects for a variety of industries.
Companies, particularly in the industrial or military sectors, could benefit from this technology for temporary installations or in areas with limited access.
The competitive advantage of the ‘ZEUS’ reactor lies in its portability and ability to provide reliable power without heavy infrastructure.
This type of micro-reactor could therefore meet specific needs where traditional power grids are absent or unreliable.
What’s more, the simplicity of its design reduces maintenance and operating costs, making it even more attractive to sectors seeking to optimize their energy resources.

NexGen Energy has opened Canadian Nuclear Safety Commission hearings for the final approval of its Rook I uranium project, following more than six years of regulatory process.
Oklo has signed a binding agreement with Siemens Energy to accelerate manufacturing of the energy conversion system for its first advanced nuclear power plant in the United States.
A security document handling incident at the nuclear power plant renews concerns about TEPCO as a key decision on restarting reactors 6 and 7 approaches in Niigata.
An initial civil nuclear cooperation agreement was signed between the United States and Saudi Arabia, prompting calls from the US Congress for strict safeguards to prevent a Middle East arms race.
The launch of the Zhaoyuan nuclear project anchors the Hualong One model inland, illustrating Beijing’s strategy of regulatory normalisation in response to Western technological restrictions.
TRISO-X has started above-ground works on the first U.S. facility dedicated to manufacturing fuel for small modular reactors, marking a key industrial milestone in the deployment of the Xe-100.
The first Russian test rig for the experimental ITER reactor has been delivered to the site in France, marking a major milestone in the international collaboration on nuclear fusion.
A strategic report reveals the industrial and energy potential of Allseas’ offshore small modular reactor, which could create up to 40,000 jobs and reduce investment in the power grid.
Niigata’s governor is expected to approve the restart of one reactor at the Kashiwazaki-Kariwa plant, inactive since the Fukushima accident, reviving a strategic asset for Japan’s energy sector.
Canadian firm Aecon and private developer Norsk Kjernekraft have signed a strategic agreement targeting the deployment of BWRX-300 small modular reactors across several potential locations in Norway.
The South African government has officially lifted the PBMR reactor out of inactivity, launching a public investment programme and transferring the strategic nuclear asset from Eskom to Necsa.
The French Court of Auditors values EDF’s grand carénage at over €100bn, while EPR2 reactors already exceed €67–75bn. The State simultaneously directs regulation, financing, and industrial strategy, raising the risk of conflict of interest.
Belarus commits major public investment to add a third reactor at the Ostrovets plant and initiates studies for a second nuclear site to support national energy demand.
Framatome’s accident-tolerant fuel prototype has completed a second 24-month cycle in a commercial nuclear reactor in the United States, paving the way for a third phase of industrial testing.
The Wylfa site in Wales will host three Rolls-Royce small modular reactors from 2026, marking a strategic investment in the UK’s nuclear expansion.
EDF confirmed that the Flamanville EPR has reached a major milestone, while planning a nearly year-long shutdown in 2026 for extensive regulatory inspections and key component replacement.
EDF is opening access to its long-term nuclear supply contracts to companies consuming more than 7 GWh per year, an adjustment driven by the gradual end of the Arenh mechanism.
South Korean authorities have approved the continued operation of the Kori 2 reactor for an additional eight years, marking a key milestone in the national nuclear strategy.
A public-private consortium is developing a 5 MW thermal microreactor designed to operate without refuelling for ten years, marking a strategic step in Brazil's nuclear innovation efforts.
EDF has announced that the Flamanville EPR reactor is now operating at 80% of its capacity. The target of reaching full output by the end of autumn remains confirmed by the utility.

All the latest energy news, all the time

Annual subscription

8.25$/month*

*billed annually at 99$/year for the first year then 149,00$/year ​

Unlimited access - Archives included - Pro invoice

Monthly subscription

Unlimited access • Archives included

5.2$/month*
then 14.90$ per month thereafter

*Prices shown are exclusive of VAT, which may vary according to your location or professional status.

Since 2021: 30,000 articles - +150 analyses/week.