Problem $5,[2p]$

Assume that the steady state concentration of vacancies in bcc iron, in a $1$MeV neutron flux of

$4*{10}^{14}c{m}^{-2}{s}^{-1}$ is given by $C_v=\frac{K_0}{K_{vV}{C}_V}$ and that the average void radius is $10nm,$ the void density is

${10}^{16}{m}^{-3}$ and the total scattering cross section is $3$ barns.

Determine the temperature at which the supersaturation factor of vacancies becomes unity, i$.$e$.$ the

temperature at which thermal effects start to dominate over irradiation ones.