[en] New TKE formulas that will replace the previous existing ones are obtained. Recently, three types of the final deformation of fissioning nuclei were found for actinides out off which only one was observed. The final deformations of the fissioning nuclei was found to be constant and independent of the mass and temperature of the fissioning system. These hence allow to deduce a new formula for the TKE release in nuclear fission process based on the invariance of scission deformations of fissioning nuclei. They yield, TKE(sym) = 0.1173 x (Z_f²/A_f^1/3)+7.5 MeV for the symmetric fission and TKE(asym) = 0.1217 x (Z_f²/A_f^1/3)+3.5 MeV for the asymmetric fission. Details for the new formulas and their comparison with the experimental data are given. (author)