Abstracts and Available Papers Presented at the
1997 International RERTR Meeting
THE ASSESSMENT OF VARIATIONS IN
THE MIGR REACTOR DESIGN
PARAMETERS WITH DECREASING NUCLEAR FUEL
ENRICHMENT DOWN TO 20%
Minatom of Russia, Moscow
V.A. Pavshook, A.S. Kaminsky, V.Ch. Palvanov
RRC "Kurchatov Institute", Moscow
The variation of physical parameters in the MIGR reactor has been studied in the case of conversion from highly enriched (90%) fuel to low enriched (20%) one.
Studies have shown that in the case of conversion to 20% enrichment, ~1.5 times increase in uranium-235 loading will be required, uranium concentration in graphite will increase by ~7 times that, however, will not result in restrictions for graphite impregnation by uranium (in the IGR reactor , uranium concentration in graphite is 3 g per 1 kg and in the MIGR reactor with fuel of 20% enrichment in U-235, it is not more than 4 g per 1 kq).
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Dr. N. V. Arkhangelsky
Minatom of Russia, Russia