  RENO (Reactor Experiment for Neutrino Oscillation) has made a definitive
measurement of the smallest mixing angle theta13 in 2012, based on the
disappearance of electron antineutrinos. More precise measurements have been
obtained and presented on the mixing angle and the reactor neutrino spectrum,
using ~800 days of data. We have observed an excess of IBD prompt spectrum near
5 MeV with respect to the most commonly used models. The excess is found to be
consistent with coming from reactors. We have also successfully measured the
reactor neutrino flux with a delayed signal of neutron capture on hydrogen. A
future reactor neutrino experiment of RENO-50 is proposed to determine the
neutrino mass hierarchy and to make highly precise measurements of theta12,
delta(m_21)^2, and delta(m_31)^2. Physics goals and sensitivities of RENO-50
are presented with a strategy of obtaining an extremely good energy resolution
toward the neutrino mass hierarchy.
