Use of remix spent mixed fuel plutonium in the BN-1200 reactor

The VVER-1000 thermal neutron reactor can operate on mixed uranium-plutonium fuel with a content of reactor-grade plutonium up to 5% 100% loaded core. In this case, burns 56% odd isotopes. energy potential such is very low, and its further use in reactors impractical. However, be used fast reactors. paper presents the results investigating possibility for isotopic composition BN-1200 value increased recycle reactor. For purpose, precision model has been developed using Serpent Monte Carlo code. verified against reference values nuclear burnup breeding ratios. study shown that MOX fuel. Maintaining operating cycle length requires fraction 2%. reactor, found improve i.e. isotopes increase. fewer at beginning cycle, greater their It seen as result calculation from spent must into least twice increase level plutonium.