We discuss the physical importance of the 1-loop correction for several supersymmetric processes. The on-shell renormalization scheme in the framework of the MSSM is adopted and 1-loop amplitudes are full-automatically calculated with GRACE system. The system GRACE/SUSY is checked by the independence on the nonlinear gauge parameters.
Authors: Junpei Fujimoto, Tadashi Ishikawa, Masato Jimbo, Toshiaki Kaneko, Tadashi KON, Yoshimasa Kurihara, Masaaki Kuroda and Yoshimitsu Shimizu