Goto

Collaborating Authors

Fukushima News: High Nuclear Reactor Radiation Fails To Bring Out Melted Fuel

International Business Times

During recent investigations conducted using cameras and robots at the site of Fukushima No. 1 nuclear power plant, after six years of the triple meltdown, it has likely identified melted fuel rods for the first time underneath the damaged reactor 2, Japan Times reported. Before this investigation, robots were also sent inside the reactor 2, in mid-February, which was the first time since the plant's meltdown in 2011, but due to extreme high radiation levels, even those could not survive, the Guardian had reported. Read: Fukushima News: Even Robots Failed To Survive In'Unimaginable' Nuclear Reactor Radiation The Fukushima Daiichi tragedy is the world's worst nuclear disaster since Chernobyl that occurred April 26, 1986. Although experts have pointed out that getting a peek into the vessel of reactor 2 was an accomplishment but the investigation also highlighted the difficulty level of reaching the exact location of the melted fuel. Removing it is still a distant thought.


Highest radiation reading since 3/11 detected at Fukushima No. 1 reactor

The Japan Times

The radiation level in the containment vessel of reactor 2 at the crippled Fukushima No. 1 power plant has reached a maximum of 530 sieverts per hour, the highest since the triple core meltdown in March 2011, Tokyo Electric Power Co. Holdings Inc. said. Tepco said on Thursday that the blazing radiation reading was taken near the entrance to the space just below the pressure vessel, which contains the reactor core. The high figure indicates that some of the melted fuel that escaped the pressure vessel is nearby. At 530 sieverts, a person could die from even brief exposure, highlighting the difficulties ahead as the government and Tepco grope their way toward dismantling all three reactors crippled by the March 2011 disaster. Tepco also announced that, based on its analysis of images taken by a remote-controlled camera, that there is a 2-meter hole in the metal grating under the pressure vessel in the reactor's primary containment vessel.


Extremely deadly radiation reading, huge hole found in grate under Fukushima No. 1 reactor vessel

The Japan Times

The radiation level in the containment vessel of reactor 2 at the crippledFukushima No. 1 power plant has reached a maximum of 530 sieverts per hour, the highest since the triple core meltdown in March 2011, oTokyo Electric Power Co. Holdings Inc. said Thursday. The reading means a person could die from even brief exposure, highlighting the difficulties ahead as the government and Tepco grope their way toward dismantling all three reactors that suffered core meltdowns in the March 2011 disaster. Tepco also announced that, based on image analysis, it has discovered a 2-meter hole in the metal grating beneath the pressure vessel inside reactor 2's containment vessel, and discovered a portion of it is warped. The hole could have been caused by melted fuel penetrating the vessel after the March 11, 2011 mega-quake and massive tsunami triggered a station blackout that crippled the plant's ability to keep the reactors cool. The new radiation level, described by some experts as "unimaginable," far exceeds 73 sieverts per hour, the previously highest radiation reading monitored in the interior of the reactor.


Tepco robot failed to capture images of melted fuel in reactor 1

The Japan Times

Tokyo Electric said Thursday that it failed to get any photos of potential fuel debris during a five-day probe of the primary containment vessel at reactor 1 of the Fukushima No. 1 power plant. Tokyo Electric Power Company Holdings Inc., however, stressed that the investigation was worthwhile because its robot was able to take underwater images in the pool of water at its bottom and gauge its radiation level, which will help it estimate where the melted fuel lies. The monstrous tsunami of March 11, 2011, tipped reactors 1, 2 and 3 into core meltdowns. The molten fuel rods then penetrated their pressure vessels before apparently dropping to the bottom of the giant containment vessels. There is about a 2.5-meter deep water pool at the bottom of the primary containment vessel of reactor 1, and Tepco believes most of its melted fuel rods fell into it.


More melted nuclear fuel found inside a Fukushima reactor

Daily Mail - Science & tech

More melted fuel has been found at the bottom of the Fukushima power planet, seven years after Japan's worst nuclear disaster.