The goal of the project is to study muon decays and neutrino oscillation parameters from the data obtained with KM3NeT ORCA detector. Tasks included in this proposal are following: 1.Participation in the KM3NeT data-taking shifts and analysis of the primary data; 2.Further development of Georgian KM3NeT Tier-2 computer center; 3.Simulation of atmospheric muon and neutrino events; 4.Studying the possibility of reconstruction of muon decays (µe νe νµ) in the KM3NeT detector; 5.Improving reconstruction and particle-identification algorithms for the neutrino events; 6.Analysis of reconstructed neutrino events.