Argonne National Laboratory
International Meeting on Reduced Enrichment for Research and Test Reactors
RERTR Program, Nuclear Science and Engineering Division at Argonne
U.S. Department of Energy

The United States Department of Energy / National Nuclear Security Administration's Office of Material Management and Minimization (M3) will host the RERTR-2023 International Meeting in Denver, Colorado, USA at the Embassy Suites by Hilton Denver Downtown Convention Center on November 5-8, 2023. Planning is currently underway to also provide virtual online participation.

We are excited to celebrate this 43rd instance of the RERTR International Meeting as we look toward our future shared successes in high enriched uranium (HEU) minimization and further proliferation resistance.

We are pleased to announce the expansion of student participation to the RERTR-2023 event. This is an excellent opportunity for the RERTR community to share our 43rd instance with the next generation of technical and policy professionals in the non-proliferation workforce. The success of our program has been the ability to learn, grow, adjust, and explore. Since the Denver location is an important airport hub, we are seizing the exciting opportunity to celebrate student involvement. Please see the Student page for additional information on applying for a grant to cover travel within the U.S.

The purpose of the RERTR-2023 International Meeting is to exchange information on the progress of national and international programs to develop low-enriched uranium (LEU) fuels, conversion analysis studies and licensing to convert research and test reactors to the use of such fuels. M3 is also soliciting discussion on broader proliferation resistance topics to develop the Proliferation Resistance Optimization (PRO-X) program along with innovative related research and the changing landscape for high-enriched uranium (HEU) minimization.

Important Deadlines


September 15, 2023 Abstract Submittal & Publication Release
September 15, 2023 IAEA Travel Grant Application Deadline
October 1, 2023 Student Travel Grant Application Deadline
October 25, 2023 Final Presentations/Posters
October 25, 2023 Online Registration
November 1, 2023 Final Papers
View forms and deadlines for RERTR-2023

The three days of sessions will focus upon:

  • Proliferation Resistance and Optimization
  • Core Design, Safety, and Utilization Analysis
  • LEU Fuel Development, Fabrication, and Qualification

In addition to the traditional topics of current reactor conversion analyses and LEU fuel qualification, the M3 Reactor Conversion Program would like to encourage presentations on the following topics:

  • Innovative Related Research: The development of technological solutions for increasingly complex conversions to LEU requires creativity and collaboration. To this end, participants are encouraged to submit papers regarding research or development topics related to conversion work that has seldom been highlighted or discussed in the RERTR context. Topics may include, but are not limited to:
    • Conversion Lessons Learned with respect to Reactor Systems
    • Status of Qualified LEU Fuel Fabrication and Supply
    • Emerging Trends of Neutron Science and Isotope Production
    • NSUF, ICERR and Other Research Reactor Consortia
    • Benchmarking Data Development and Sharing
  • Changing Landscape for HEU Minimization: The RERTR program develops technology necessary to enable the conversion of civilian facilities from HEU to LEU fuels and targets. Since it began in 1978, the program and the research reactor community have achieved significant success; to date, 106 research reactors and medical isotope facilities worldwide have either converted to LEU or confirmed shutdown. While the mission remains the same, the environment and context for this work have changed. Participants are also encouraged to submit presentations addressing these changes, including but not limited to:
    • Retrospective and Future Views of Research Reactor Programs
    • Technology Advancements (such as beam lines, neutron guides, instruments...)
    • Opportunities and New Challenges facing the reactor community (such as upgrades, cold sources, experimental loops and devices vs. plant aging and workforce challenges)
    • Connections between Advanced Power Reactor Community and Research Reactors

Technical and policy experts interested in attending the meeting must register prior to October 25, 2023. Participants having interest in any of the LEU conversion topics listed above are encouraged to present their work at the meeting. Please indicate your intention to submit a paper by completing the Abstract Submittal and Publication Release forms found here and submitting them no later than September 15, 2023. Other information to facilitate attendance and participation in the meeting is available by navigating this website.


For further information and questions please contact the Organizing Committee.

Last Modified: Mon, September 11, 2023 10:04 AM

2023 RERTR Meeting

The 2023 RERTR International Meeting (RERTR-2023) was held in Denver, Colorado, USA, from November 5-8, 2023.

For more information:

Technical Program Questions:

John Holland
Argonne National Laboratory
See also Program Committee

Administrative Questions:
Karen Grudzinski
Argonne National Laboratory
9700 South Cass Avenue, Building 208
Lemont, Illinois 60439-4842
Phone: +1 (630) 252-1671


NNSA logo

in cooperation with

IAEA logo


Argonne logo

INL logo


U.S. Department of Energy | UChicago Argonne LLC
Privacy & Security Notice | Contact Us |   go to top