  High-energy neutrino astronomy will probe the working of the most violent
phenomena in the Universe. The Giant Radio Array for Neutrino Detection (GRAND)
project consists of an array of $\sim10^5$ radio antennas deployed over
$\sim$200000km$^2$ in a mountainous site. It aims at detecting high-energy
neutrinos via the measurement of air showers induced by the decay in the
atmosphere of $\tau$ leptons produced by the interaction of the cosmic
neutrinos under the Earth surface. Our objective with GRAND is to reach a
neutrino sensitivity of
$3\times10^{-11}E^{-2}$GeV$^{-1}$cm$^{-2}$s$^{-1}$sr$^{-1}$ above $3
\times10^{16}$eV. This sensitivity ensures the detection of cosmogenic
neutrinos in the most pessimistic source models, and about 100 events per year
are expected for the standard models. GRAND would also probe the neutrino
signals produced at the potential sources of UHECRs.
  We show how our preliminary design should enable us to reach our sensitivity
goals, and present the experimental characteristics. We assess the possibility
to adapt GRAND to other astrophysical radio measurements. We discuss in this
token the technological options for the detector and the steps to be taken to
achieve the GRAND project.
