[en] The first wall (FW) is one of the most important components of Test Blanket Module (TBM). Its design limits are the coolant pressure of 8 MPa, peak heat load on the plasma side of 500 kW/m² and heat flux of 60 and 35 kW/m² from breeding units in middle and side parts, respectively. To meet the allowed temperature rise in steel, the mass flow rate of 1.3 kg/s and coolant velocity of about 80 m/s have been chosen, what implied the coolant system consisting of 14 parallel channels each with three sweeps. Structural analyses have been performed only for 1 of the TBM assuming a complete symmetry with respect to the vertical and horizontal mid planes; FW, caps, end plates of the high pressure coolant manifold and the back plate of the BU's have been modelled, while breeding units and other internal structures have been omitted. The cooling fluid is modelled with line elements inside the channels. In order to ascertain that the evaluation of heat transfer in FW is reliable, three-dimensional simulations of fluid and heat flow by code STAR-CD have been performed as well. The analyses revealed that: (i) the magnitude of heat transfer coefficient evaluated by Dittus-Boelter correlation is for the conditions of the first wall overestimated, (ii) a reliable cooling of the first wall can be reached only if rough channels with absolute roughness of R_t=20 μm are applied and (iii) in order to predict temperature field in steel correctly, heat transfer coefficient and bulk temperature in FEM models along the channel have to be modified having final values of 10000 W/m²K in the channel curvature with flow direction to FW plasma side and decreasing to 4475 W/m²K on the way to the other curvature. Computed pressure drop is 0.3 MPa. The analyses of the thermo elastic behaviour of the generic TBM first wall have shown that the ITER Structural Design Criteria with the use of EUROFER interim material data for thermal stresses are met for operational cyclic loads. The same is true for a pressurisation of the TBM breeding zone with 8 MPa coolant pressure due to an ' in box ' loss of coolant accident. (author)