The Neptune/Radioactive Components Facility Site was licensed in November 1961 and houses the Neptune test reactor which is used to conduct experiments on reactor cores.
It was created as a joint company in 1954 with the name Rolls-Royce and Associates; the associates being Vickers, Foster Wheeler and later Babcock & Wilcox. It changed its name on 15 January 1999 to Rolls-Royce Marine Power Operations Limited and is part of the marine business of Rolls-Royce plc. It changed its name again on 1 August 2018 to Rolls-Royce Submarines Limited. [1]