Argonne National Laboratory
Reduced Enrichment for Research and Test Reactors
Nuclear Engineering Division at Argonne
U.S. Department of Energy


RERTR FUEL TESTS – As part of the advanced fuel development program for RERTR, fuel samples are being tested in Department of Energy's Advanced Test Reactor at Idaho National Laboratory.

The Reduced Enrichment for Research and Test Reactors (RERTR) Program develops technology necessary to enable the conversion of civilian facilities using high enriched uranium (HEU) to low enriched uranium (LEU) fuels and targets. The RERTR Program was initiated by the U.S. Department of Energy in 1978. During the Program's existence, over 40 research reactors have been converted from HEU (= or >20% U-235) to LEU (< 20% U-235) fuels, and processes have been developed for producing radioisotopes with LEU targets. The RERTR Program is managed by the Office of Nuclear Material Threat Reduction in the National Nuclear Security Administration (NNSA). The main technology components of the program are:

  1. the development of advanced LEU fuels,
  2. design and safety analysis for research reactor conversion, and
  3. development of targets and processes for the production of the medical isotope Molybdenum-99 with LEU.

Fuels for Research and Test Reactors

Design and Safety Analyses for Research and Test Reactors

Radioisotope Production

Reference Documents concerning the RERTR Program

RERTR International Meetings

Upcoming RERTR International Meetings

2015 RERTR Meeting

RERTR-2015 will be held on Oct. 11-14, 2015. A technical tour is planned for Thursday, Oct. 15, 2015. More details will follow as soon as they become available.

Recent RERTR International Meetings

RERTR-2014 International Meeting

The U.S. Department of Energy / National Nuclear Security Administration’s Office of Global Threat Reduction hosted the “RERTR 2014 International Meeting on Reduced Enrichment for Research and Test Reactors.” The International Atomic Energy Agency (IAEA) supported RERTR by hosting the event at the IAEA Vienna International Center (VIC) in Vienna, Austria from 12-15 October 2014. A technical tour was planned on October 16, 2014. The meeting was organized by Argonne National Laboratory and Idaho National Laboratory and was the 35th annual meeting in a series on the same general subject regarding conversion of reactors within the Global Threat Reduction Initiative.

RERTR-2014 related resources:

Visit the RERTR-2014 website

Past RERTR International Meetings


The 2013 RERTR Meeting was cancelled due to the U.S. government shutdown.


2012 RERTR Meeting

2011 RERTR Meeting

2010 RERTR Meeting

2009 RERTR Meeting

For the complete list of RERTR International Meetings, see RERTR International Meetings


See list of RERTR Program contacts


Mission Statement

The RERTR program mission supports the minimization and, to the extent possible, elimination of the use of HEU in civil nuclear applications by working to convert research reactors and radioisotope production processes to the use of LEU fuel and targets throughout the world.


Meeting: Oct. 11-14, 2015
Technical Tour: Oct. 15, 2015

2014 RERTR Meeting

The 2014 International RERTR Meeting (RERTR-2014) took place in Vienna, Austria on Oct. 12-15, 2014.
For more information visit RERTR-2014.


Securing the world’s most vulnerable nuclear material
Image Credits: NNSA

Feb. 18, 2014 - Securing the world’s most vulnerable nuclear material
Argonne works to support President Obama’s vision of a world free of nuclear weapons through efforts to secure the world’s most vulnerable nuclear material and eliminate the use of high enriched uranium in civilian applications under the U.S. DOE Global Threat Reduction Initiative
Read more on Obama’s Four Year Effort » [5.2MB]


Useful Links



Past Meetings docs


The Nuclear Engineering Division at Argonne offers postdoctoral and student opportunities.


Argonne offers three Postdoctoral Fellowship Programs to outstanding doctoral scientists and engineers who are at early points in their promising careers. Please check our Postdoctoral Opportunities website for details about the Programs, a list of recent Postdoc Openings, contact information and more.



To find out about employment and internship opportunities visit our Students website.


The Nuclear Engineering Division Student Outreach Committee serves as a point of contact to student organizations and it also maintains regular communications with university nuclear engineering programs.
The Student Outreach website informs you about current committee activities and provides other information of interest to students.

ARGONNE NATIONAL LABORATORY, Nuclear Engineering Division, RERTR Department
9700 South Cass Ave., Argonne, IL 60439-4814
A U.S. Department of Energy laboratory managed by UChicago Argonne, LLC

Last modified on February 05, 2013 16:16 +0100