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Reduced Enrichment for Research and Test Reactors
Nuclear Engineering Division at Argonne
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Abstracts and Available Papers Presented at the
1997 International RERTR Meeting

A NEUTRONIC FEASIBILITY STUDY FOR LEU CONVERSION 
OF THE HIGH FLUX BEAM REACTOR (HFBR)

R. B. Pond, N. A. Hanan and J. E. Matos
Argonne National Laboratory
Argonne, IL

ABSTRACT

A neutronic feasibility study for converting the High Flux Beam Reactor at Brookhaven National Laboratory from HEU to LEU fuel was performed at Argonne National Laboratory. The purpose of this study is to determine what LEU fuel density would be needed to provide fuel lifetime and neutron flux performance similar to the current HEU fuel.

The results indicate that it is not possible to convert the HFBR to LEU fuel with the current reactor core configuration. To use LEU fuel, either the core needs to be reconfigured to increase the neutron thermalization or a new LEU reactor design needs to be considered. This paper presents results of reactor calculations for a reference 28-assembly HEU-fuel core configuration and for an alternative 18-assembly LEU-fuel core configuration with increased neutron thermalization. Neutronic studies show that similar in-core and ex-core neutron fluxes, and fuel cycle length can be achieved using high-density LEU fuel with about 6.1 gU/cm3 in an altered reactor core configuration. However, hydraulic and safety analyses of the altered HFBR core configuration needs to be performed in order to establish the feasibility of this concept.


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Technology Development - 362
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Last modified on July 29, 2008 11:33 +0200