March 8, 2019 — On 13 February, a robot arm successfully picked up pebble-sized pieces of radioactive fuel at Japan’s Fukushima nuclear plant. The plant operator, Tokyo Electric Power (TEPCO), sent a remote-controlled probe to the bottom of the plant’s Number 2 reactor. It grasped five small pieces of debris from the fuel rods and lifted them a couple of inches.
The robot did not actually remove the fuel debris. This was just a test to see if it could be moved. The company plans to actually remove some fuel debris as a sample by March 2020. Robots have already been used to remotely observe the inside of the reactor. The purpose of the latest test was to see whether the fragile material would crumble when picked up. Actually removing the melted fuel is considered the most difficult part of the clean-up operation.
This marks a step forward in the clean-up, but setbacks continue and lingering problems remain. Just as the Japanese government was making a new push to ease import restrictions in Taiwan and Hong Kong, radioactive cesium above the legal limit was detected in a fish caught off Fukushima. And though scientists are gaining a better understanding of how radioactivity forms hotspots, a new release of stored radioactive cooling water appears unavoidable.
More than seven years after the accident, fear of radiation now poses a greater obstacle to the economic recovery of the region’s seafood industry than any actual physical damage. Several countries have put in place bans on Fukushima’s seafood as a preventative measure.