Unit 4 at the Chashma nuclear power plant in Pakistan was connected to the grid on 29 June. The Chinese-supplied pressurised water reactor (PWR) - the country's fifth power reactor - is expected to start up by the end of August. world-nuclear-news.org No U.S. nuclear power plant has been penetrated in a cyber attack, an industry spokesman said on Saturday, when asked to comment on a U.S. government warning last week about a hacking campaign targeting the sector. Usnews.com Fears the US will withdraw its security umbrella from Europe could push countries to develop their own nuclear weapons, according to a group that monitors global arsenals. euronews.com Operators at the Oyster Creek Generating Station shut the plant down unexpectedly at 10:15 a.m. Monday to address an equipment issue on the "non-nuclear" side of the plant, a plant spokeswoman said. App.com