largest municipally owned utility. The COL was approved by the NRC on February 9, 2016. Due to market conditions, these two planned units may never be built and do not have a planned construction date. United Kingdom Horizon Nuclear Power had plans to build Hitachi-GE ABWRs at Wylfa in Wales and Oldbury in England. Both projects were paused in March 2012 by the shareholders at the time (RWE and E-ON) to put Horizon up for sale, with Hitachi becoming the new owner. The 'Development Consent Order' for Wylfa was accepted in June 2018 and in August Bechtel were appointed as project managers. The first reactor was expected online in the mid-2020s with construction at Oldbury expected to start a few years after this. However, on January 17, 2019, Horizon Nuclear Power announced the suspension of both these projects for financial reasons. Reliability In comparison with comparable designs, the four ABWRs in operation are often shut down due to technical problems. The International Atomic Energy Agency documents this with the 'operating factor' (the time with electricity feed-in relative to the total time since commercial operation start). The first two plants in Kashiwazaki-Kariwa (block 6 & 7) reach total life operating factors of 70%, meaning that about 30% of the time, since commissioning, they were not producing electricity. For example, in 2010 Kashiwazaki-Kariwa 6 had an operating capacity of 80.9%, and an operating capacity of 93% in 2011. However, in 2008 it did not produce any power as the installation was offline for maintenance, and therefore had an operating capacity of 0% for that year. In contrast other modern nuclear power plants like the Korean OPR-1000 or the German Konvoi show operating factors of about 90%. The output power of the two new ABWRs at the Hamaoka and Shika power plant had to be lowered because of technical problems in the power plants steam turbine section. After throttling both power plants down, they still have a heightened downtime and show a lifetime operating factor under 50%. Deployments ABWR-II design A number of design variants have been considered, with power outputs varying from 600 to 1800 MWe. The most developed design variant is the ABWR-II, started in 1991, an enlarged 1718 MWe ABWR, intended to make nuclear power generation more competitive in the late 2010s. None of these designs have been deployed. The new designs hoped to achieve 20% reductions in operating costs,