Nuclear power in the United Kingdom became a public limited company, British Nuclear Fuels plc, wholly owned by the UK government. A Thermal Oxide Reprocessing Plant (THORP) was opened at Sellafield in 1994. Construction had begun in the 1970s and cost £2.4 billion. The Sizewell B nuclear power plant was built and commissioned between 1987 and 1995, and began producing power for the national grid in February 1995. Its construction followed a four-year, 16 million-word public inquiry. As of 2014 it is the most recent nuclear plant to be constructed in the United Kingdom. Sizewell B was intended to be the first of a series of
Wylfa Nuclear Power Station nuclear station on a site adjacent to the old plant. An application to build two advanced boiling water reactors was submitted by Horizon Nuclear Power to the Office of Nuclear Regulation on 4 April 2017. Wylfa was the second nuclear power station to be built in Wales after Trawsfynydd in 1959. Following the closure of Trawsfynydd in 1991, Wylfa became Wales' only nuclear power station. Construction of Wylfa, which was undertaken by British Nuclear Design & Construction (BNDC), a consortium backed by English Electric, Babcock & Wilcox Ltd and Taylor Woodrow Construction, began in 1963. The reactors were supplied by