A reactor's first wall operates at a neutron wall loading of

PHYSICS · Multi-part · Fermi University Physics · Plasma Physics · Fusion plasmas · Fusion plasmas

Energy from Physics, Ch Fusion as a power plant: gain, beta, wall loading and breeding

Problem

\Gamma_n = 2.5\,\mathrm{MW\,m^{-2}}

. For the structural steel used, radiation damage accumulates at a rate proportional to the wall loading, at

10\,\mathrm{dpa}

(displacements per atom) per full-power year for each

1\,\mathrm{MW\,m^{-2}}

of loading. The material is replaced once it reaches

150\,\mathrm{dpa}

. ((a)) Find the damage accumulation rate at this wall loading, in dpa per full-power year. ((b)) Find the wall's lifetime in full-power years.