— The Erimtan Angle —

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The Associated Press reports that “[r]obot probes sent to one of Japan’s wrecked Fukushima nuclear reactors have suggested worse-than-anticipated challenges for the plant’s ongoing cleanup. The plant’s operator Tokyo Electric Power Co. said the remote-controlled ‘scorpion’ robot was sent into the Unit 2 reactor’s containment vessel Thursday [, 16 February 2017] to investigate the area around the core that had melted six years ago, but it failed while climbing over highly radioactive debris. The robot, carrying a dosimeter and two small cameras, transmitted some data and visuals but could not locate melted fuel — key information to determine how to remove debris out of the reactor. The robot was abandoned inside the vessel at a location where it won’t block a future robot. Preliminary examinations over the past few weeks have detected structural damage to planned robot routes and higher-than-expected radiation, suggesting the need to revise robot designs and probes. TEPCO is struggling with the plant’s decommissioning, which is expected to last decades, following the 2011 earthquake and tsunami that led to the meltdown. Tens of thousands of residents had evacuated their homes, many of them still unable to return due to high radiation”.i

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Already in 2015, AP’s Mari Yamaguchi reported that a “new robot that raises its tail like a scorpion is scheduled to survey melted nuclear fuel inside one of the three wrecked reactors at Tepco’s Fukushima No. 1 plant. Toshiba Corp., co[-]developer of the device, which was demonstrated on Tuesday [, 30 June 2015], said the robot will venture into reactor 2’s primary containment vessel in August after its operators undergo a month of training”.ii And after long delays, ‘scorpion’ robots have finally started to penetrate the site in the early months of 2017, leading “TEPCO officials [to say] that despite the dangerously high figures, radiation is not leaking outside of the reactor”.iii In a more straightforward manner, though, Japan Today reports that the ‘scorpion’ “robot [finally] sent into a Japanese nuclear reactor to learn about the damage suffered in a tsunami-induced meltdown had its mission aborted after the probe ran into trouble, Tokyo Electric Power Co (TEPCO) said Thursday [, 16 February 2017]”.iv A Japan Today reader employing the pseudonym since1981 penned this telling and insightful comment, even managing to include a swipe at the Drumpf: “6 years on and still investigating damage. But they want the world to believe all is safe and people can return to their homes. Even CNN has a nice ad explaining that all is well. Sad, so sad”.

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i“Robot probes show Japan reactor cleanup worse than expected” Associated Press on Yahoo (17 Feb 2017). http://associatedpress-yahoopartner.tumblr.com/post/157343800402/robot-probes-show-japan-reactor-cleanup-worse-than.

ii Mari Yamaguchi r, “Toshiba rolls out ‘scorpion’ robot to look inside crippled reactor at Fukushima No. 1” AP (01 July 2015). http://www.japantimes.co.jp/news/2015/07/01/business/tech/toshiba-rolls-scorpion-robot-look-inside-stricken-fukushima-reactor-2/#.WKbXPPnhDIU.

iii “Robot probes show Japan reactor cleanup worse than expected”.

iv“’Scorpion’ robot mission inside Fukushima reactor aborted” Japan Today (17 Feb 2017). https://www.japantoday.com/category/national/view/scorpion-robot-mission-inside-fukushima-reactor-aborted.

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