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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 finds gaping hole in grate under containment vessel, potential fuel debris at Fukushima No. 1 power plant

The Japan Times

The radiation level in the containment vessel of the No. 2 reactor at the defunct Fukushima No. 1 power plant has reached a maximum of 530 sieverts per hour, the highest since the triple core meltdown in March 2011, operator Tokyo Electric said Thursday. Tokyo Electric Power Company Holdings Inc. also announced that, based on image analysis, it has discovered a 2-meter hole in the metal grating beneath the pressure vessel inside the No. 2 unit's containment vessel, and detected that a portion of it is warped. According to Tepco, the blazing radiation reading was taken near the entrance area in the space just below the pressure vessel, which contains the reactor core. The previously high was 73 sieverts per hour. The hole could have been caused by melted fuel penetrating the vessel after a mega-quake and massive tsunami triggered a station blackout that crippled the plant's ability to keep the reactors cool on March 11, 2011.


Fukushima radiation levels hit record high

Daily Mail - Science & tech

Radiation levels inside a stricken reactor at Japan's Fukushima nuclear plant have hit a record high. Levels are now so high that they could kill off robots sent in to probe the reactors. The development casts doubt over how the disaster-hit facility will be safely dismantled in the future. Radiation levels inside a stricken reactor at Japan's Fukushima nuclear plant have hit a record high. Levels are so high that they could kill off robots sent in to probe the reactors.


High radiation readings complicate Fukushima robot strategy at unit 2

The Japan Times

The high radiation estimates in the No. 2 reactor of the stricken Fukushima No. 1 nuclear plant will probably force a rethink of the nationalized utility's robot-based strategy for locating its molten fuel. According to an analysis of Thursday's abbreviated probe, the radiation in the primary containment vessel is about 650 sieverts per hour, more than the 530 sieverts estimated late last month, Tokyo Electric Power Company Holding Inc. said. That level could kill a person quickly and indicates the fuel likely burned through the pressure vessel during the meltdown and is somewhere nearby. Tepco, as the utility is known, halted Thursday's robot after its camera went dark. The company suspects the problem was caused by the radiation.


Japan's Fukushima site waste is BLOCKING robot probes

Daily Mail - Science & tech

Robot probes sent in to study Japan's Fukushima site keep failing during their recon missions. The radiation levels at the site are so high that previous clean-up bots have struggled to withstand conditions within the reactor for long. Now the head of decommissioning for the damaged Fukushima nuclear plant said on Thursday that the company's robots were not able to get close enough to the core area. Robot probes sent in to study Japan's Fukushima site keep failing during their recon missions. This image shows a photograph taken by a probe sent into Fukushima's No. 2 reactor Tokyo Electric Power Co (TEPCO), the company that owns the Fukushima plant, took radiation readings using a robot probe.