This is the second international Ulaanbaatar conference on Nuclear Physics and applications. The first conference was held in 2008. These conferences are motivated by the worldwide increase of nuclear energy for peaceful use. Uranium rich Mongolia plans to use uranium resources with further intentions of nuclear fuel cycles steps. The conference attendees included participants from more than a dozen countries as well as scientists and policy makers in Mongolia. The conference proceedings book includes technical papers and basic nuclear science in various nuclear science applications such as nuclear power reactors.