International Journal of Nuclear Energy / 2014 / Article / Tab 3

Research Article

Improving Nuclear Safety of Fast Reactors by Slowing Down Fission Chain Reaction

Table 3

Properties of neutron moderators at 20°C.

ModeratorAverage logarithmic energy loss Moderating ratio 
Neutron age
(0.1 MeV0.5 eV) 
(cm2)
Diffusion length (cm)Mean lifetime of thermal neutrons (ms)

H2O0.9570630.2
D2O0.57459058147130
BeO0.1724766378
12C0.162421605613
Pbnat0.009620.63033130.8
208Pb0.009584772979341598

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