This photo shows the Unit 2 reactor of the Fukushima Daiichi nuclear power plant in Okuma, Fukushima prefecture, northern Japan, on Aug. 22, 2024. (Kyodo News via AP)

FILE - Tokyo Electric Power Company Holdings, also known as TEPCO, the operator of Japan's wrecked Fukushima Daiichi nuclear power plant, reveals a robot to be used to retrieve debris at the power plant in Kobe, western Japan, May 28, 2024. (Kyodo News via AP, File)

In this photo released by Tokyo Electric Power Company Holdings (TEPCO), monitoring workers rearrange the push-in pipes into the right order, at Fukjushima Daiichi nuclear power plant in Okuma, Fukushima prefecture, northern Japan Saturday, Sept. 7, 2024. (Tokyo Electric Power Company Holdings via AP)

In this photo released by Tokyo Electric Power Company Holdings (TEPCO), TEPCO executives observe plant officials making final procedural checks from an operation room to monitor and remote control an extendable robot, at Fukjushima Daiichi nuclear power plant in Okuma, Fukushima prefecture, northern Japan Monday, Sept. 9, 2024. (Tokyo Electric Power Company Holdings via AP)

This photo shows the Fukushima Daiichi nuclear power plant in Okuma, Fukushima prefecture, northern Japan, on Aug. 22, 2024. (Kyodo News via AP)