Both are three-loop designs originally based on the same French design, but now have different nuclear cores.[16] The first two ACP1000 units will be built at Fuqing Nuclear Power Plant.[2] In early 2014 it was announced that the merged design was moving from preliminary design to detailed design. Power output will be 1150 MWe, with a 60-year design life, and would use a combination of passive and active safety systems with a double containment. Initially the merged design was to be called the ACC-1000,[17][18][19] but ultimately it was named Hualong One.