The Inertial Fusion Reactor KOYO. proposed by ILE Osaka was completed in its first phase study in 1992, and recent updates including new features have been released up to now. It is based on potentially I;ey achievements in Inertial Fusion Energy (IFE) physics: development to achieve required laser efficiency, implosion stability and gain, pellet fabrication, chamber maintenance, engineering feasibilities, and cost of electricity. Neutron (target) emission profiles are reported assuming direct drive compressed targets (500 g.cm(-3)), which have been described with different approaches in stationary transport models. A full three-dimensional description of the reactor has been used to perform the neutronic analysis. Neutron spectra and fluences are calculated, and compared with previous one-dimensional results showing the differences in using both approaches. Some figures indicating the neutron flux expected through deep penetrations impinging on the final optics are also presented, representing its coincidence at long distances with the uncollided flux. The reported consequences art: those related to the activation of tile materials: shallow land burial (SLB) and recycling. Those radiological responses have been studied for the SIC tubes (components of the blanket), graphite (reflector), anti ferritic steel HT-9 (structural wall).
