根據東電 2011年11月最初的評估，溶解的燃料棒為 63%，但如今的新評估卻顯示，反應堆冷凍系統的停運時間，較之前估算早了超過 5小時，因此更多的核燃料掉落到安全殼。即使要清理，也得安排更安全。
reactor 3 worse than thought Fukushima
Nuclear & Energy
Aug. 6, 2014
The operator of the crippled Fukushima Daiichi nuclear plant says the damage to nuclear fuel in one of its reactors may be worse than previously thought.
It says most of the fuel melted through the reactor core and had dropped into the containment vessel by the following morning.
Aug 6, 2014
Tokyo Electric Power Co. said Wednesday that its new estimate shows that all the fuel rods in reactor 3 at the
No. 1 nuclear power plant apparently melted down and fell onto the bottom of
the containment vessel. Fukushima
In November 2011, the company had said it believed only about 63 % of reactor 3's fuel core had melted.
August 07, 2014
The meltdown at the Fukushima Daiichi nuclear power plant’s third reactor building was even worse than initially believed, Tokyo Electric Power Co. (TEPCO) has announced.
In fact, the power company’s new appraisal of the
No. 3 reactor building shows that
all – or nearly all – of the fuel rods contained inside were melted, dropping
onto the floor of the containment vessel. If true, the news means the power
plant could be even tougher to decommission. Fukushima
According to the Japan Times, TEPCO first estimated back in November of 2011 that roughly 63 percent of the reactor’s fuel rods had melted.