The effect of neptunium on the neutron multiplication factor in the process of fuel burnup: 1) conventional uranium fuel (4.4% of 235U + 95.6% of 238U); 2) introducing 1% of neptunium (4.4% of 235U + 94.6% of 238U + 1% of 237Np); 3) introducing 2% of neptunium (4.4% of 235U + 93.6% of 238U + 2% of 237Np); 4) introducing a large amount of neptunium (35% of 235U + 65% of 237Np).

 
 
  Part of: Baatar T, Kulikov EG (2020) Justification of VVER-1000 safety when using fuel compositions doped by protactinium and neptunium. Nuclear Energy and Technology 6(2): 99-104. https://doi.org/10.3897/nucet.6.55218