Abstracts and Available Papers Presented at the Meeting
Impact of the HEU/LEU Conversion on
Experimental Facilities
M. Marek, J. Kysela, J.
Ernest, S. Flibor, V. Broz
Reactor Services Division
Nuclear Research Institute Rez, plc., Husinec 130,
CZ-25068, Czech Republic
ABSTRACT
The LVR-15 reactor is a multipurpose research facility
used for basic research on horizontal channels, material
and corrosion studies in loops and irradiation rigs, and
for the isotope production. A conversion from HEU
(IRT-2M 36%, so far used) to LEU (IRT-3M 19.5%, IRT- 4M
19.5%) is planned till 2010. The influence of the new
type of fuel on the performance of the experimental
facilities operated at the reactor has been studied. The
comparison of the calculated neutron fluence rates and
spectra using NODER operational code (3D nodal
diffusion) and MCNP code for both the fresh and depleted
cores was performed. Results of the analyses and future
plans are presented in the article.
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2007 International RERTR Meeting
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