###### Abstract  
The Plasma Facing Components (PFCs) of the divertor target contribute to the fundamental functions of heat removal and particle exhaust during fusion operation, being subjected to a very hostile and complex loading environment characterized by intense particles bombardment, high heat fluxes (HHF), varying stresses loads and a significant neutron irradiation. The development of a well-designed divertor target, which represents a crucial step in the realization of DEMO, needs the assessment of all these loads as accurately as possible, to provide pivotal data and indications for the design and structural performance prediction of the PFCs. In a particular way, this study is fully devoted to the comprehension of the distributions on the divertor target of the main nuclear loads due to neutron irradiation, performed for the first time using an extremely detailed approach. This work has been carried-out considering the latest configuration of the DEMO reactor, including the updated design of the divertor and ITER-Like PFCs geometry, varying the blanket layout (Water Cooled Lithium Lead--WCLL and Helium Cooled Pebble Bed--HCPB), thus evaluating the impact of the different blanket concept on the above-mentioned distributions. Neutronics analyses have been performed with MCNP5 Monte Carlo code and JEFF3.3 nuclear data libraries. 3D DEMO MCNP models have been created, focusing in particular on a thorough representation of the divertor and PFCs, allowing for the assessment of the distributions of the main nuclear loads: radiation damage (dpa/FPY), He-production rate (appm/FPY) and nuclear heating density (W/cm\({}^{3}\)) and total nuclear power deposition (MW). These results are presented by means of 2D maps and plots for each PFCs sub-component both for WCLL and HCPB blanket case: W-monblocks, Cu-interlayers'CuCrZr-pipe and PFC-CB (Cassette Body) supports made of Eurofer steel. PCC; DEMO; neutronics; divertor; MCNP 20233 13 January 202313 January 202 collide with atoms of the target material, and exchange momentum. This could cause the ejection of atoms from the solid surface, through the erosion process of sputtering [3, 4, 6, 7]. If neutron irradiation is added, the operational conditions of DEMO divertor targets become even more critical, underlining the necessity to deal with these challenging issues [9, 12]. Neutrons penetrate deeply in the machine damaging the whole volume of the reactor. The main primary effects of neutron irradiation on plasma facing materials, can be expressed in terms of nuclear loads: radiation damage, which leads to atomic displacements; transmutation due to neutron interaction with matter, which leads to the formation of He and H gasses and other chemical elements, some of which can induce a high induced radioactivity; nuclear heating, caused by the above-mentioned phenomena and all the possible nuclear reactions that can occur in the interaction between radiation and matter, with a consequent release of energy. They can lead to consequent secondary microscopic and macroscopic material's responses, which generally include: material overheating, swelling, change in electrical resistivity, dimensional instabilities, change in yield strength and the loss of ductility with the increase of embrittlement behavior, change in creep rate, change in fatigue life, the loss of fracture toughness, induced radioactivity and decay heat, change in thermal conductivity, chemical composition change and others [7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24], as shown in Figure 1[13]. This entails that due to their location, the PFCs receive the highest damage during operation and thus these are the parts with the shortest lifetime in the reactor. In this regard, it appears evident how performing a detailed and accurate neutronics assessment of the distribution on the targets of the nuclear loads and quantities of interest, represents a crucial aspect for the design of PFCs.