An article in the Japan Times quotes Tepco as saying that last months 530 svH readings have been surpassed by the latest which came in at 650 svH.
“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”
“Three of the Fukushima No. 1 plant’s six reactors were hit by meltdowns after the March 2011 mega-quake and tsunami caused a station blackout that knocked out the plant’s cooling systems. It is the worst nuclear disaster since the Chernobyl in 1986.
Tepco is still in the early stage of assessing the conditions in and around the damaged reactors so the fuel can be removed. The decommissioning is expected to take decades”.
Meanwhile tons of radioactive water continue to leak into the Pacific Ocean on a daily basis.
Here is a report on progress, take with a grain of salt, since for a long time Tepco has been lying about the situation there.