A********h
发帖数: 2789 | 1 小日本怎么还不把这个处理掉，留着祸害人类
Fukushima nuclear reactor radiation at highest level since 2011 meltdown
Radiation levels inside a damaged reactor at theFukushimaDaiichi
nuclear power station are at their highest since the plant suffered a triple
meltdown almost six years ago.
The facility’s operator, Tokyo Electric Power (Tepco), said atmospheric
readings as high as 530 sieverts an hour had been recorded inside the
containment vessel of reactor No 2, one of three reactors that experienced a
meltdown when the plant was crippledby a huge tsunamithat struck
the north-east coast of Japan in March 2011.
The extraordinary radiation readings highlight the scale of the task
confrontingthousands of workers, as pressure builds on Tepco to begin
decommissioning the plant – a process that is expected to take about four
decades.
The recent reading, described by some experts as “unimaginable”, is far
higher than the previous record of 73 sieverts an hour in that part of the
reactor.
A single dose of one sievert is enough to causeradiation sickness and
nausea; 5 sieverts would kill half those exposed to it within a month, and a
single dose of 10 sieverts would prove fatal within weeks.
Tepco also said image analysis had revealed a hole in metal grating beneath
the same reactor’s pressure vessel. The one-metre-wide hole was probably
created by nuclear fuel that melted and then penetrated the vessel after the
tsunami knocked out Fukushima Daiichi’s back-up cooling system.
“It may have been caused by nuclear fuel that would have melted and made a
hole in the vessel, but it is only a hypothesis at this stage,” Tepco’s
spokesman Tatsuhiro Yamagishi told AFP.
“We believe the captured images offer very useful information, but we still
need to investigate given that it is very difficult to assume the actual
condition inside.”
The presence of dangerously high radiation will complicate efforts to safely
dismantle the plant.
A remote-controlled robot that Tepco intends to send into the No 2 reactor’
s containment vessel is designed to withstand exposure to a total of 1,000
sieverts, meaning it would survive for less than two hours before
malfunctioning.
The firm said radiation was not leaking outside the reactor, adding that the
robot would still prove useful since it would move from one spot to the
other and encounter radiation of varying levels.
Tepco and its network of partner companies at Fukushima Daiichi have yet to
identify the location and condition of melted fuel in the three most
seriously damaged reactors. Removing it safely represents a challenge
unprecedented in the history of nuclear power.
Quantities of melted fuel are believed to have accumulated at the bottom of
the damaged reactors’ containment vessels, but dangerously high radiation
has prevented engineers from accurately gauging the state of the fuel
deposits.
Earlier this week, the utilityreleased images of dark lumpsfound
beneath reactor No 2 that it believes could be melted uranium fuel rods –
the first such discovery since the disaster.
In December, the government said the estimated cost of decommissioning the
plant and decontaminating the surrounding area, as well as paying
compensation and storing radioactive waste, had risen to 21.5tn yen (
150bn), nearly double an estimate released in 2013.
https://www.theguardian.com/environment/2017/feb/03/fukushima-daiichi-
radiation-levels-highest-since-2011-meltdown | A********h
发帖数: 2789 | 2 今年美国已经禁止从日本进口食物了，超市买东西的时候注意点 | a*****i
发帖数: 2108 | 3 派谁去啊，自慰队都拒绝去还能找谁。
triple
a
【在 A********h 的大作中提到】
: 小日本怎么还不把这个处理掉，留着祸害人类
: Fukushima nuclear reactor radiation at highest level since 2011 meltdown
: Radiation levels inside a damaged reactor at theFukushimaDaiichi
: nuclear power station are at their highest since the plant suffered a triple
: meltdown almost six years ago.
: The facility’s operator, Tokyo Electric Power (Tepco), said atmospheric
: readings as high as 530 sieverts an hour had been recorded inside the
: containment vessel of reactor No 2, one of three reactors that experienced a
: meltdown when the plant was crippledby a huge tsunamithat struck
: the north-east coast of Japan in March 2011.
| l*****6
发帖数: 7881 | 4 本版日托儿们应该可以派去。比如雅力士，bookman。为皇军效力。
【在 a*****i 的大作中提到】
: 派谁去啊，自慰队都拒绝去还能找谁。
:
: triple
: a
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