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 National Nuclear Security Administration's Office of Material Management and Minimization (M3) will host the "RERTR-2021 International Meeting" as a series of virtual sessions April 20-22, 2021 that is being organized in cooperation with the International Atomic Energy Agency with Argonne National Laboratory chairing the annual meeting.

We are excited to celebrate this 41st instance of the RERTR International Meeting as we look toward our future shared successes in high enriched uranium (HEU) minimization and further proliferation resistance.

The purpose of the RERTR-2021 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.

The Zoom virtual session panels and presentations will be composed of invited speakers from government, industry, and research institutions from around the globe. A preliminary layout of half-day sessions is shown below. Posters are invited for participants that wish to share information with the community. The posters will be made available to meeting registrants online, with chat and Zoom interaction with the poster authors available.

Important Dates


March 26, 2021 Abstract Submittal & Publication Release
April 12, 2021 Full Poster
April 16, 2021 Online Registration
View forms and deadlines for RERTR-2021

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 posters 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 posters 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 April 16, 2021. Participants having interest in any of the LEU conversion topics listed above are encouraged to present a poster at the meeting. Please indicate your intention to submit a poster by completing the Abstract Submittal and Publication Release forms found here and submitting them along with the poster abstract no later than March 26, 2021. 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, April 19, 2021 9:42 AM

2021 RERTR Meeting

The 2021 RERTR International Meeting (RERTR-2021) was held on April 20-22, 2021.

RERTR-2021 News:

Feb. 8, 2021Announcing RERTR-2021Details

For more information:

Technical Questions:
For further information and questions please contact:

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


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