Radiation accidents

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)

FILE - In this March 16, 2011, file photo, steam escapes from Exelon Corp.'s nuclear plant in Byron, Ill. The nuclear power industry is pushing the Nuclear Regulatory Commission to cut back on inspections at nuclear power plants and throttle back what it tells the public about plant problems. (AP Photo/Robert Ray, File)

FILE: In this file photo from Tuesday, May 9, 2017, signs are posted by the Hanford Nuclear Reservation in Richland, Wash. Officials have ordered some workers at a sprawling Washington state nuclear waste site to go inside and stay there because steam has emerged from a tunnel filled with waste that was being filled with cement. The U.S. Department of Energy says in a statement Friday that there is no indication that the steam seen at the Hanford Nuclear Reservation contains radiation or any other hazardous material and that the workers were ordered inside as a precaution. (AP Photo/Manuel Valdes)

FILE - In this Jan. 9, 2013, file photo, a CT scan technician prepares for a patient at the Silver Cross Emergency Care Center in Homer Glen, Ill. The Trump administration is quietly trying to weaken radiation rules, relying on scientific outliers who argue that a little radiation damage is actually good for you _ like a little bit of sunlight. (AP Photo/M. Spencer Green, File)

FILE - In this Jan. 9, 2013, file photo, a CT scan technician prepares for a patient at the Silver Cross Emergency Care Center in Homer Glen, Ill. The Trump administration is quietly trying to weaken radiation rules, relying on scientific outliers who argue that a little radiation damage is actually good for you _ like a little bit of sunlight. (AP Photo/M. Spencer Green, File)

FILE - In this Sept. 24, 1999, file photo, employees of Murphy Family Farms along with friends and neighbors, float a group of dead pigs down a flooded road on Rabon Maready's farm near Beulaville, N.C. The hogs drowned from the floodwaters of the NE Cape Fear River after heavy rains from Hurricane Floyd flooded the area. The heavy rain expected from Hurricane Florence could flood hog manure pits, coal ash dumps and other industrial sites in North Carolina, creating a noxious witches’ brew of waste that might wash into homes and threaten drinking water supplies. (AP Photo/Alan Marler, File)

Police, in blue with yellow uniform, search for missing persons around a house destroyed by a landslide after a powerful earthquake in Atsuma town, Hokkaido, northern Japan, Thursday, Sept. 6, 2018. Several people were reported missing in the nearby the town, where a massive landslide engulfed homes in an avalanche of soil, rocks and timber. (Masanori Takei/Kyodo News via AP)