The UK Nuclear Decommissioning Authority (NDA) announced the closure of the world’s oldest nuclear power plant, that stopped generating electricity at 11h00 on 29 February 2012 after 44 years of operation. Since 1967 it has generated 137.5 TWh of power. This leaves only two reactors at the Wylfa plant as First Generation MAGNOX plants operating in the UK. Both were commissioned in 1971.