Science and Technology of Nuclear Installations / 2011 / Article / Tab 2

Research Article

Radiogenic Lead with Dominant Content of 208Pb: New Coolant and Neutron Moderator for Innovative Nuclear Facilities

Table 2

Properties of neutron moderators at 20°C.

ModeratorAverage logarithmic energy loss, 𝜉 Moderating ratio, 𝜉 Σ 𝑠 / Σ 𝑡 𝑎 Neutron age
τ (cm2) (0.1 MeV → 0.5 eV)
Diffusion length L (cm)Mean lifetime of thermal neutrons 𝑇 t h (ms)

H2O0.95701.3530.2
D2O0.57459058147130
BeO0.1724766378
12C0.162421605613
Pbnat0.009620.63033130.8
208Pb0.009584772979341598