ARPA-E Archived Funding Opportunities

DE-FOA-0002530: Optimizing Nuclear Waste and Advanced Reactor Disposal Systems (ONWARDS)

The program goal of ONWARDS is to support the development of technologies that address significant challenges to closing the back-end of advanced reactor (AR) nuclear fuel cycles. Specifically, projects funded under the ONWARDS Program will develop and demonstrate sustainable technologies that will significantly improve the disposal impact of used nuclear fuel (UNF) and other waste streams stemming from the implementation of AR fuel cycles by developing innovative and cost-effective approaches in reprocessing, material accountancy, and waste forms. ONWARDS metrics include an order-of-magnitude reduction in AR waste volume generation or repository footprint compared to light-water nuclear reactors (LWR), better than 1% fissile-mass accountancy in reprocessing streams, development of high-performance AR waste forms for a variety of potential deep-geological repositories (DGR) and disposal concepts, and costs in the range of $1/megawatt-hour (MWh).


  • ONWARDS FA - DE-FOA-0002530 Mod 1 (Last Updated: 8/23/2021 02:17 PM ET)

Previous Versions

  • ONWARDS_CP FOA_DE-FOA-0002530 (Last Updated: 5/19/2021 09:14 AM ET)

Application Forms and Templates

The following forms and templates may be used as part of the application submission. Note that these forms and templates do not necessarily constitute all the documents required for a complete application. Please refer to the 'Application and Submission Information' of the published announcement to learn more about the required application content requirements.

View Application Forms and Templates

Concept Paper

  • ONWARDS Concept Paper Template (Last Updated: 5/18/2021 12:58 PM ET)

Full Application

  • ONWARDS - Technical Volume Template (Last Updated: 8/23/2021 04:45 PM ET)
  • SF-424 (Last Updated: 8/23/2021 04:45 PM ET)
  • Budget Justification/ SF-424A Workbook (Last Updated: 8/24/2021 04:15 PM ET)
  • Budget Justification/ SF-424A Workbook Guidance (Last Updated: 8/24/2021 04:15 PM ET)
  • Business Assurances & Disclosures Form - Template (Last Updated: 8/23/2021 04:47 PM ET)
  • Business Assurances & Disclosures Form - Sample (Last Updated: 8/23/2021 04:48 PM ET)
  • Summary Slide Template (Last Updated: 8/23/2021 04:49 PM ET)
  • Summary for Public Release Template (Last Updated: 8/23/2021 04:50 PM ET)
  • Replies to Reviewer Comments Template (Last Updated: 8/23/2021 04:51 PM ET)

Contact Information

    Please contact the email address above for questions regarding ARPA-E’s online application portal, ARPA-E eXCHANGE.
    Please contact the email address above for questions regarding Funding Opportunity Announcements. ARPA-E will post responses on a weekly basis to any questions that are received. ARPA-E may re-phrase questions or consolidate similar questions for administrative purposes.

Submission Deadlines

  • Concept Paper Submission Deadline: 7/9/2021 9:30 AM ET
  • Full Application Submission Deadline: 10/7/2021 9:30 AM ET
  • View Full Application Reviewer Comments Period: 11/19/2021 5:00 PM ET – 11/24/2021 5:00 PM ET