Neutron absorption profile in a reactor moderated by different mixtures of light and heavy waters

作者：Nagy Mohamed E; Aly Mohamed N; Gaber Fatma A; Dorrah Mahmoud E^*

来源：Annals of Nuclear Energy, 2014, 72: 487-496.

DOI：10.1016/j.anucene.2014.06.005

• Mixed water moderator
• Nuclear reactor
• LR-0 reactor
• Heavy water
• Control rods
• Absorption spectra

A Monte-Carlo parametric study was carried out to investigate the neutron absorption profile in a model of LR-0 reactor when it is moderated by different mixtures of heavy/light waters at molecular ratios ranging from 0% up to 100% D2O at increments of 10% in D2O. The tallies included; neutron absorption profiles in control rods and moderator, and neutron capture profile in U-238. The work focused on neutron absorption in control rods entailing; total mass of control rods needed to attain criticality, neutron absorption density and total neutron absorption in control rods at each of the studied mixed water moderators. The aim was to explore whether thermal neutron poisons are the most suitable poisons to be used in control rods of nuclear reactors moderated by mixed heavy/light water moderators.

• 出版日期2014-10