In a groundbreaking exploration, micro-drones have captured unprecedented footage from within the devastated Fukushima Daiichi nuclear power plant, revealing critical new details about the 2011 meltdown’s aftermath. The remotely operated drones, measuring just 12 by 13 centimeters and weighing only 95 grams, successfully navigated the highly radioactive environment of Unit 3’s reactor during a two-week reconnaissance mission.
The newly released video evidence shows a substantial breach in the steel pressure vessel’s base, with substantial deposits of what experts believe to be melted nuclear fuel debris suspended from the damaged structure. This marks the first direct observation of the reactor vessel’s bottom since the catastrophic meltdown triggered by the March 2011 earthquake and tsunami that crippled Japan’s northeastern coast.
Tokyo Electric Power Company Holdings (TEPCO), the plant’s operator, deployed these specialized drones to gather visual documentation, radiation measurements, and three-dimensional mapping data from the previously inaccessible containment chamber. The footage reveals extensively damaged internal structures, including ruptured tubes and formations resembling large icicles of solidified nuclear material.
According to TEPCO spokesperson Masaki Kuwajima, the mission provided ‘valuable data that can be used for our future internal investigations and to develop melted fuel debris removal strategy.’ The three damaged reactors collectively contain approximately 880 tons of highly radioactive melted fuel debris, presenting extraordinary technical challenges for eventual cleanup operations.
The successful drone deployment represents significant progress from earlier robotic probes, including an underwater investigation nearly a decade ago that yielded limited visual information. TEPCO plans additional remote-controlled missions and sampling operations to analyze the melted fuel composition and develop specialized robotics for the complex removal process, which experts anticipate could require several decades to complete.