Researchers say X-ray-like photos of a crippled reactor at the Fukushima Daiichi plant have confirmed that no nuclear fuel remains in the reactor core. Energoatom, Ukrenergo and Polenergia have signed a memorandum of understanding on a project to export electricity via European grids. world-nuclear-news.org Clean energy sources, including small modular nuclear reactors (SMRs), must make up at least 25% of the energy consumed by US federal agencies by 2025 under an executive order on federal sustainability issued by President Barack Obama. world-nuclear-news.org A top adviser to the government of Pakistan says it needs short-range "tactical" nuclear weapons to deter archrival India, although critics fear it could increase the risk of a nuclear war. hosted.ap.org