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

2007 International RERTR Meeting

Abstracts and Available Papers Presented at the Meeting

Performance Gain with Low-Enriched Fuel and Optimized Use of Neutrons

Alexander Glaser
Program on Science and Global Security
Princeton University


The most challenging type of reactors to convert to low-enriched fuel are high- flux research reactors, which, along with some spallation sources, are the most important neutron sources for modern neutron scattering experiments. Advanced Monte-Carlo computer codes are now available that make it possible to track neutrons from the reactor core, through neutron guides, to instruments and detectors. These "virtual experiments" allow optimizing the performance of a research facility as a whole instead of the reactor alone. This article brie y reviews performance gains obtained for high-flux reactors during previous facility-upgrades. The Monte-Carlo code VITESS is used to compare results for typical neutron scattering experiments using obsolete versus state-of- the-art technologies. The analysis shows that performance gains due to instrument upgrades or neutron guide renewals dwarf potential neutron flux losses due to conversion to low-enriched fuel. Combined convert-and-upgrade strategies therefore offer unique opportunities for reactor operators and neutron instrument groups to significantly improve the overall performance of research facilities. (*)

(*) An earlier version of this paper was presented at the 48th Annual Meeting of the Institute for Nuclear Materials Management (INMM), July 8-12, 2007, Tucson, Arizona.

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Dr. Jordi Roglans-Ribas
Technical Director, RERTR Department
Nuclear Engineering Division 362
Argonne National Laboratory
9700 South Cass Avenue
Argonne, IL 60439
Fax:  +1 630-252-5161

2012 RERTR Meeting

We regret to inform that, due to the current U.S. government shutdown, the 2013 International RERTR Meeting (RERTR-2013) (Oct. 27-30, 2013 - Chicago, Il USA) has been cancelled.
For more information visit RERTR-2013.


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 July 29, 2008 16:02 +0200