Grants / Department of Energy / Advanced Research Projects Agency Energy

DE-FOA-0003623: High-performance Optimized Recycled Nuclear Isotopes for Gen IV reactors (HORNIG)

Closed Closed August 6, 2026 Opportunity DE-FOA-0003623 ☆ Save

This grant is closed. A newer notice from the same program is open now: Unlocking New Levels of Output and Capacity for Key Subsurface Resources (UNLOCK) (DE-FOA-0003630). Status: Closes November 20, 2026 (13 days left). It is in our archive of Advanced Research Projects Agency Energy notices from 2026.

• Award ceiling$7.0 million
• Award floor$500,000
• Total funding$50.0 million
• Expected awards10
• Cost sharingRequired
• Funding typeCooperative Agreement, Other

Key dates

Who can apply

This opportunity was open to any type of organization.

• Unrestricted (i.e., open to any type of entity above), subject to any clarification in text field entitled "Additional Information on Eligibility"

See Section II.A. of the NOFO.

More grants for nonprofits, colleges and universities, state and local governments, tribes, small businesses, businesses, individuals.

Is this a realistic fit?

• Past Advanced Research Projects Agency - Energy awards averaged $1.9 million; this notice allows up to $7.0 million per award.
• Most of the program's money (43% over five years) went to colleges and universities.
• The notice requires cost sharing or matching funds, so you must contribute part of the project cost.

What the grant funds

This is Modification 01 to the NOFO: • Inserted certain deadlines and updated dates, including the deadlines for submitting questions and Full Applications (Basic Information, Section IV.C). NOFO Number: DE-FOA-0003623 – High-performance Optimized Recycled Nuclear Isotopes for Gen IV reactors (HORNIG) Agency Overview: The Advanced Research Projects Agency—Energy (ARPA-E), an organization within the Department of Energy (DOE), is chartered by Congress in the America COMPETES Act of 2007 (Public Law 110–69), as amended by the America COMPETES Reauthorization Act of 2010 (Public Law 111–358), as further amended by the Energy Act of 2020 (Public Law 116–260). ARPA-E issues this Notice of Funding Opportunity (NOFO) under its authorizing statute codified at 42 U.S.C. § 16538. The NOFO and any cooperative agreements or grants made under this NOFO are subject to 2 C.F.R. Part 200 as supplemented by 2 C.F.R. Part 910. ARPA-E funds research on, and the development of, transformative science and technology solutions to address the energy and environmental missions of the Department. The agency focuses on technologies that can be meaningfully advanced with a modest investment over a defined period of time in order to catalyze the translation from scientific discovery into early-stage technology. For the latest news and information about ARPA-E, its programs and the research projects currently supported, see: http://arpa-e.energy.gov/. ARPA-E funds transformational research. Existing energy technologies generally progress on established “learning curves” where refinements to a technology and the economies of scale that accrue as manufacturing and distribution develop drive improvements to the cost/performance metric in a gradual fashion. This continual improvement of a technology is important to its increased commercial deployment and is appropriately the focus of the private sector or the applied technology offices within DOE. In contrast, ARPA-E supports transformative research that has the potential to create fundamentally new learning curves. ARPA-E technology projects typically start with cost/performance estimates well above the level of an incumbent technology. Given the high risk inherent in these projects, many will fail to progress, but some may succeed in generating a new learning curve with a projected cost/performance metric that is significantly better than that of the incumbent technology.

Category: Opportunity Zone Benefits, Science and Technology and other Research and Development.

Applying now

This notice no longer takes applications. Apply under the newer notice, DE-FOA-0003630, which is open now.

The notice on Grants.gov keeps its full text and attachments, which is useful for planning a resubmission.