  We study the dynamics of a Bose-Einstein condensate in the quasiperiodic
kicked rotor described by a Gross-Pitaevskii equation with periodic boundary
conditions. As the interactions are increased, Bogoliubov excitations appear
and deplete the condensate; we characterize this instability by considering the
population of the first Bogoliubov mode, and show that it does not prevent, for
small enough interaction strengths, the observation of the transition. However,
the predicted subdiffusive behavior is not observed in the stable region. For
higher interaction strengths, the condensate may be strongly depleted before
this dynamical regimes set in.
