A constant energy molecular dynamics is performed by the following keyword 'MD.Type':
    MD.Type          NVE       # NOMD|Opt|NVE|NVT_VS|NVT_NH
 
         1:    MD step
         2:    MD time
        14:    kinetic energy of nuclear motion, Ukc (Hartree)  
        15:    DFT total energy, Utot (Hartree)  
        16:    Utot + Ukc (Hartree)  
        17:    Fermi energy (Hartree)