[en] First boronization was achieved in Tore-Supra with a 10% B₂H₆+He mixture. A quantitative inventory of the boron compound deposition during the boronization by means of residual gas analysis shows that at wall temperature of 200 deg C, 96.4% of the diborane is cracked and this ratio reaches 99.8% when the glow discharge is performed. Analysis of exposed samples yields a high boron concentration and a B/C ratio constant on the 100 nm depth of the deposited layer. The oxygen content of the discharge decreased by a factor of 5, and consequently the M.q product (M being the Murakami parameter) increased from 7 to 11.8.10¹⁹m^-2T^-1. After the second boronization performed in 10% B₂H₆+D₂ gas mixture a low isotopic ratio H/(H+D) in the plasma and enhanced recycling properties have been obtained