Corridor Business Journal: The owner of the Duane Arnold Energy Center nuclear power plant near Palo says the plant will likely close in 2025, about nine years earlier than it is licensed to operate. The potential for an early closing was disclosed by NextEra Energy Resources on Friday in its fourth quarter 2017 earnings report, which included a $258 million after-tax impairment charge for the plant. The charge reflected a review of Duane Arnold Energy Center’s value and the costs to retire it after NextEra concluded that its largest customer was unlikely to renew its power purchase agreement when it expires.