RENO has two identical detectors, placed at distances of 294 m and 1383 m, that observe electron antineutrinos produced by six reactors at the Hanbit Nuclear Power Plant (the old name: the Yeonggwang Nuclear Power Plant) in Korea.
[1]: 6 On 3 April 2012, with some corrections on 8 April, the RENO collaboration announced a 4.9σ[broken anchor] observation of θ13 ≠ 0, with This measurement confirmed a similar result announced by the Daya Bay Experiment three weeks before and is consistent with earlier, but less significant results by T2K, MINOS and Double Chooz.
RENO released updated results[4] in December 2013, confirming θ13 ≠ 0 with a significance of 6.3σ: In 2014, RENO announced the observation of an unexpectedly large number of neutrinos with an energy of 5±1 MeV.
[5]: 14–15 This has since been confirmed by the Daya Bay and Double Chooz experiments,[1]: 14–17 and the cause remains an outstanding puzzle.
Expansion plans, referred to as RENO-50, will add a third medium-baseline detector at a distance of 47 km.