Nuclear power generation

In this undated photograph obtained by The Associated Press, a UAV-X drone flown by Yemen's Houthi rebels is seen in Hodeida, Yemen. A Yemen rebel drone strike this week, likely by UAV-Xs, on a critical Saudi oil pipeline shows that the otherwise-peaceful sandy reaches of the Arabian Peninsula now are at risk of similar assault, including an under-construction nuclear power plant and Dubai International Airport, among the world's busiest. (AP Photo)

In this photo released by the official website of the office of the Iranian Presidency, President Hassan Rouhani speaks in a cabinet meeting in Tehran, Iran, Wednesday, May 8, 2019. Rouhani said Wednesday that it will begin keeping its excess uranium and heavy water from its nuclear program, setting a 60-day deadline for new terms to its nuclear deal with world powers before it will resume higher uranium enrichment. (Iranian Presidency Office via AP)

FILE - In this Nov. 2, 2006, file photo, cooling towers of the Three Mile Island nuclear power plant are reflected in the Susquehanna River in this image taken with a slow shutter speed in Middletown, Pa. The owner of Three Mile Island, site of the United States' worst commercial nuclear power accident, is acknowledging in a Wednesday, May 8, 2019 statement that it is unlikely to get a financial rescue from Pennsylvania and says it plans to go through with a shutdown starting June 1. (AP Photo/Carolyn Kaster, File)

This image released by Tokyo Electric Power Co. (TEPCO) shows the operation floor above a cooling pool at Unit 3 of the Fukushima nuclear power plant in Okuma town, Fukushima prefecture, northeastern Japan, Monday, April 15, 2019. The operator TEPCO of the tsunami-wrecked Fukushima nuclear plant began removing fuel from the cooling pool at one of three reactors that melted down in the 2011 disaster, a milestone in the decades-long process to decommission the plant. (Tokyo Electric Power Co. via AP)

Yoon Chang-yul, second from right, a senior official at the Prime Minister's Office, announces the government's stance on the World Trade Organization's ruling in favor of South Korea 's import ban on Japanese seafood at the government complex in Sejong, South Korea, Friday, April 12, 2019. South Korea on Friday welcomed the decision and said it will continue to block all fishery products from Fukushima and seven neighboring prefectures to ensure "only foods that are confirmed as safe are put on the table. (Jin Sung-chul/Yonhap via AP)

FILE - In this Jan. 25, 2018, file photo, an installation of a dome-shaped rooftop cover housing key equipment is near completion at Unit 3 reactor of the Fukushima Dai-ich nuclear power plant ahead of a fuel removal from its storage pool in Okuma, Fukushima Prefecture, northeast Japan. Japan has partially lifted an evacuation order in one of the two hometowns of the tsunami-wrecked Fukushima nuclear plant for the first time since the 2011 disaster. The action taken Wednesday, April 10, 2019, allows people to return about 40 percent of Okuma. The other hometown, Futaba, remains off-limits as are several other towns nearby.(AP Photo/Mari Yamaguchi, File)

Energy Secretary Rick Perry testifies during a House Appropriations subcommittee hearing on budget on Capitol Hill in Washington, Tuesday, March 26, 2019. (AP Photo/Andrew Harnik)

FILE - This March 6, 2014, file photo shows the idled Waste Isolation Pilot Plant, the nation's only underground nuclear waste repository, near Carlsbad, N.M. Shipments of waste to the repository resumed in April 2017 for the first time since a 2014 radiation release contaminated part of the facility. (AP Photo/Susan Montoya Bryan, File)

Jim Freeman tries to saw through thick ice slabs on his property in Fremont, Neb., Thursday, March 14, 2019, after the ice-covered Platte River flooded it's banks. Evacuations forced by flooding have occurred in several eastern Nebraska communities. (AP Photo/Nati Harnik)