A robot resumes mission to retrieve a piece of melted fuel from inside a damaged Fukushima reactor

Associated Press Finance09-10

An extendable robot on Tuesday resumed its entry into one of three damaged reactors at Fukushima Daiichi nuclear power plant to retrieve a fragment of melted fuel debris, nearly three weeks after its ...

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Once inside the vessel, the robot is operated remotely from a safer location.The mission to obtain the fragment and return with it is to last about two weeks.The government and TEPCO are sticking to a 30 to 40-year cleanup target set soon after the meltdown, despite criticism it is unrealistic. No specific plans for the full removal of the melted fuel debris or it","collect":0,"end_time":0,"defaultTopTitle":"yahoo.com","property":[],"viewcount":null,"language":"en","relate_stocks":{"BK4081":"电力公用事业","TKECY":"Tokyo Electric Power Company Holdings","TKECF":"Tokyo Electric Power Company Holdings"},"translate_title":"一个机器人恢复从受损的福岛反应堆内取回一块熔化燃料的任务","themeId":null,"isJumpTheme":false,"ttsUrl":null,"symbols_score_info":{"TKECF":0.9,"TKECY":0.9},"content_text":"An extendable robot on Tuesday resumed its entry into one of three damaged reactors at Fukushima Daiichi nuclear power plant to retrieve a fragment of melted fuel debris, nearly three weeks after its earlier attempt was suspended due to a technical issue.\nThe collection of a tiny sample of the spent fuel debris from inside of the Unit 2 reactor marks the start of the most challenging part of the decadeslong decommissioning of the plant where three reactors were destroyed in the March 11, 2011, magnitude 9.0 earthquake and tsunami disaster.\nThe sample-return mission, initially scheduled to begin on Aug. 22, was suspended when workers noticed that a set of five 1.5-meter (5-foot) add-on pipes to push in and maneuver the robot were in the wrong order and could not be corrected within the time limit for their radiation exposure, the plant operator Tokyo Electric Power Company Holdings said.\nThe pipes were to be used to push the robot inside and pull it back out when it finished. Once inside the vessel, the robot is operated remotely from a safer location.\nThe robot, nicknamed “telesco,\" can extend up to about 22 meters (72 feet), including the pipes pushing it from behind, to reach its target area to collect a fragment from the surface of the melted fuel mound using a device equipped with tongs that hang from the of the robot. \nThe mission to obtain the fragment and return with it is to last about two weeks.\nThe mix-up, which TEPCO called a “basic mistake,” triggered disappointment and raised concerns from officials and local residents. Industry Minister Ken Saito ordered TEPCO President Tomoaki Kobayakawa a thorough investigation of the cause and preventive steps before resuming the mission.\nThe pipes were brought into the Unit 2 reactor building and pre-arranged at the end of July by workers from the robot's prime contractor and its subsidiary, but their final status was never checked until the problem was found.\nTEPCO concluded the mishap was caused by a lack of attention, checking and communication between the operator and workers on the ground. By Monday, the equipment was reassembled in the right order and ready for a retrial, the company said.\nThe goal of the operation is to bring back less than 3 grams (0.1 ounce) of an estimated 880 tons of fatally radioactive molten fuel that remain in three reactors. The small sample will provide key data to develop future decommissioning methods and necessary technology and robots, experts say.\nThe government and TEPCO are sticking to a 30 to 40-year cleanup target set soon after the meltdown, despite criticism it is unrealistic. No specific plans for the full removal of the melted fuel debris or its storage have been decided.","kind":null,"is_publish_news":true,"is_publish_highlight":false,"is_publish_live":false,"is_publish_wemedia":null,"editions":null,"column":"","sentiment":"0","news_tag":"","news_rank":0,"symbols":[],"gpt_button":1},"commentList":[],"isCommentEnd":true,"newsSizeData":{"likeSize":0,"commentSize":0,"repostSize":0,"favoriteSize":0,"likeStatus":false,"favoriteStatus":false},"APP":{"userAgent":"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)","isDev":false,"isTTM":true,"deviceId":"web-server-community-laohu8-v3","version":"4.29.2","shortVersion":"4.29.2","platform":"web","vendor":"web","appName":"ttm","isIOS":false,"isAndroid":false,"isTiger":false,"isTHS":false,"isWeiXin":false,"isWeiXinMini":false,"isWeiBo":false,"isQQ":false,"isBaiduSwan":false,"isBaiduBox":false,"isDingTalk":false,"isToutiao":false,"isOnePlus":false,"isHuaWei":false,"isXiaomi":false,"isXiaomiWebView":false,"isOppo":false,"isVivo":false,"isSamsung":false,"isMobile":false},"href":"/m/news/2466291611"}