 Construction was expected to start in 2018, but as of December 2018 has been delayed at least until 2021.The plant will not be operational before 2028, 4 years behind schedule.On 25 September 2014 after TVO's repeated delays in building the third reactor and its failure to begin work on the fourth reactor in time, the government refused TVO's application for a further extension to the permit for the fourth reactor.