Presents measurements of NMR spin lattice relaxation time in beryllium metal between 300 and 1200K. A very low electronic contribution to the relaxation (T1e T=1.85*104sK) allows observation of the dipolar contribution due to Be atomic motions as well as the quadrupolar contribution due to field gradient fluctuations coming from vacancy and impurity motions. From the slope of the dipolar contribution, one can deduce a value of 1.35 eV for the self diffusion activation energy in agreement with previous values obtained by T2 measurements. The quadrupolar contribution attributed to vacancy motions presents a maximum at about 570K. This gives a value of 0.65 eV for the migration energy. The slope of this contribution is strongly dependent on the thermal treatment and the purity of the samples. This can be understood if one takes account of bounded vacancies with binding energy as high as -0.5 eV.