# High-performance Optimized Recycled Nuclear Isotopes for Gen IV reactors (HORNIG)

Source: https://welltoldgrants.com/grants/de-foa-0003623-high-performance-optimized-recycled-nuclear-isotopes-for-gen/  
Official notice: https://www.grants.gov/search-results-detail/362035

> Advanced Research Projects Agency Energy offered grants of up to $7.0 million (at least $500,000) to any type of organization. It expected to make about 10 awards worth $50.0 million in total. Applications closed on August 6, 2026.

| Field | Value |
|---|---|
| Opportunity number | DE-FOA-0003623 |
| Agency | Advanced Research Projects Agency Energy |
| Status | Forecast |
| Deadline | August 6, 2026 |
| Award ceiling | $7.0 million |
| Award floor | $500,000 |
| Expected awards | 10 |
| Total funding | $50.0 million |
| Cost sharing | required |
| Assistance Listings | 81.135 |

## Who can apply

- 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.

## 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.

## Questions people ask

### Is DE-FOA-0003623 still open?

No. It closed on August 6, 2026. A newer notice is open: DE-FOA-0003630, closes November 20, 2026 (13 days left).

### Who can apply for High-performance Optimized Recycled Nuclear Isotopes for Gen IV reactors (HORNIG)?

Advanced Research Projects Agency Energy accepted applications from any type of organization. The notice adds further conditions, so read its eligibility section.

### What is the deadline for High-performance Optimized Recycled Nuclear Isotopes for Gen IV reactors (HORNIG)?

Closed August 6, 2026. Applications are no longer accepted; the program's newer notices are on this page when there are any.

### How much funding is available?

Awards of up to $7.0 million each. About $50.0 million in total across about 10 awards.

### Who has won Advanced Research Projects Agency - Energy grants before?

The largest recipients over five fiscal years were RTX Corporation, Massachusetts Institute of Technology, BWXT Advanced Technologies LLC. The program made 729 awards worth $1.4 billion in that time.