2007. Preparatory work required for the completion of Units 3 and 4 is scheduled to begin by the end of 2007. Company president Robert Van Adel announced that he would be stepping down from the position of president and retired from the company effective November 11, 2007. Energy Alberta Corporation announced August 27, 2007, that they had filed application for a license to build a new nuclear plant at Lac Cardinal (30 km west of the town of Peace River. The application would see an initial twin AECL Advanced CANDU Reactor (ACR) plant go online in 2017, producing 2.2 gigawatt (electric). Point Lepreau, New Brunswick CANDU 6 plant refurbishment to begin as of April 1, 2008. In June 2008, the Province of Ontario has announced plans to build two additional commercial reactors for electricity generation at a site next to Ontario Power Generation's Darlington Nuclear Generating Station Two companies, AREVA and Westinghouse Electric Company along with AECL submitted proposals to build the reactors. In June 2009 the province announced that only AECL's ACR-1000 submission met all the proposal requirements. The Ontario government has since suspended the acquisition process citing the cost and uncertainty surrounding the companies future ownership (discussed below). Medical isotope production using the 1957-built NRU reactor experienced two forced outages due to safety concerns (December 2007) and a heavy water leak (May 14, 2009). The production from the NRU reactor represented a significant fraction of the worlds medical isotope supply and the disruptions caused a worldwide shortage. Due to maintenance requirements from the aging NRU reactor and the failure of the MAPLE 1 & 2 reactor projects, the long term production of medical isotopes at Chalk River became uncertain. The NRU reactor at Chalk River was shut down in 2018. 2011 Divestiture CANDU Design Division In the summer of 2011 SNC-Lavalin won an international bidding process for the reactor design division of the company. Prior to the acquisition, of SNC Lavalin's international power workforce (400 of 4000) were engaged in the production and refurbishment of nuclear reactors. Concerns raised about the deal include a lack of commitment by SNC-Lavalin to keeping the design division intact (its size makes it more capable of providing ongoing safety support). For 2010 and 2009 combined Atomic Energy of Canada Ltd lost million. Following divestiture of the reactor design division, AECL will consist of the current Nuclear Laboratories division, including the Chalk River