An overwhelming majority of US lawmakers demanded President Barack Obama hold the line on Iran, as a permanent agreement regarding the Islamic republic's contested nuclear program is under negotiation in Vienna.
Chinese President Xi Jinping and US President Barack Obama will hold a bilateral meeting on the sidelines of the Nuclear Security Summit (NSS) in the Netherlands next week.
The head of the UN nuclear watchdog said Monday his agency would keep working to improve safety after the Fukushima crisis, but no atomic plant could be "100 percent" safe from natural disasters.
Thousands of campaigners rallied against nuclear power in Tokyo Saturday, as the government and utilities move toward resumption of reactors in southern Japan.
A fire which sparked the evacuation of a major underground US nuclear waste plant last month was preventable, according to a report out Friday highlighting safety lapses at the site.
German Chancellor Angela Merkel arrived in Israel to discuss nuclear talks with Iran and to encourage Prime Minister Benjamin Netanyahu to reach a two-state solution with the Palestinians.
An elderly nun who broke into what was supposed to be one of the most carefully guarded nuclear facilities in the United States was sentenced to nearly three years in prison.
Nuclear talks between Iran and world powers move to the next level as negotiators begin work on an ambitious lasting accord to silence for good fears about Tehran's atomic ambitions.
Iran agreed Sunday to clarify to the UN atomic agency its need for detonators used in nuclear devices, as part of a probe into allegations of its past weapons work.
Firefighters scrambled Wednesday to contain a blaze at a US nuclear waste plant in New Mexico, while underground staff were evacuated and some taken to hospital.
World powers will hold their next talks on Tehran's contested nuclear programme February 18, top Iranian and European Union diplomats agreed during Friday talks.
President Barack Obama appears to have prevailed, for now, in a campaign to stop Congress from imposing new sanctions on Iran he fears could derail nuclear diplomacy.
President Barack Obama declared Tuesday that America must move away from a permanent war footing to give diplomacy a chance to resolve some of the world's toughest problems, such as the nuclear standoff with Iran.
Iran is due Monday to unplug key nuclear equipment for six months in return for a slight easing of crippling Western sanctions, as an interim deal between Tehran and world powers takes effect.