The International Atomic Energy Agency (IAEA) today started a peer review mission in Japan to assess its regulatory framework for nuclear and radiation safety. world-nuclear-news.org Iran has removed the core of its Arak heavy-water nuclear reactor and filled it with cement, according to the country's official news agency Fars. bbc.com Ontario Power Generation (OPG) is working to ensure nuclear power is part of the province's future with approved plans for a $12.8-billion refurbishment of four nuclear reactors at the Darlington generating station, just east of Toronto. cbc.ca Emergency nuclear sirens to be tested in New Jersey, Delaware. nj.com