sentences:  He cited safety concerns stemming from Japan's 2011 Fukushima nuclear disaster, saying "I cannot support issuing this license as if Fukushima never happened".According to senior scientist Edwin Lyman from the UCS, despite the events of September 11, the Nuclear Regulatory Commission (NRC) has voted to delay implementation of safety and security upgrades in ways that will weaken protection of nuclear power plants.Experience has shown that having a good security plan on paper is no guarantee that it could be implemented in practice.