sniffer

15# 秋之皓月

It depends on what’s generating the radiation. If the radiation is from the cesium etc. released from the meltdown, the risk should be minimal as those isotopes degenerate within seconds. As long as you control the meltdown, then things should go back to normal quickly.

However, if the rad rate is sustained (ie. from the reactor 4’s spent fuel pool), let’s just say Fukushima would not by my first choice for holiday in the next 30 years


Here is research:
From http://en.wikipedia.org/wiki/Sievert . .
Single dose examples
•        Eating one banana: 0.0001 mSv
•        Sleeping next to a human for 8 hours: 0.0005 mSv[1]
•        Dental radiography: 0.005 mSv[2]
•        Average dose to people living within 16 km of Three Mile Island accident: 0.08 mSv; maximum dose: 1 mSv[3]
•        Mammogram: 3 mSv[2]
•        Brain CT scan: 0.8–5 mSv[4]
•        Chest CT scan: 6–18 mSv[4]
•        Gastrointestinal series X-ray investigation: 14 mSv[5]
•        International Commission on Radiological Protection recommended limit for volunteers averting major nuclear escalation: 500 mSv[6]
•        International Commission on Radiological Protection recommended limit for volunteers rescuing lives or preventing serious injuries: 1000 mSv[6]
[edit] Hourly dose examples
•        Approximate radiation levels near Chernobyl reactor 4 and its fragments, shortly[clarification needed] after explosion are reported to be 10–300 Sv/hr
[edit] Yearly dose examples
•        Living near a nuclear power station: 0.0001–0.01 mSv/year[5][1]
•        Living near a coal power station: 0.0003 mSv/year[1]
•        Cosmic radiation (from sky) at sea level: 0.24 mSv/year[5]
•        Terrestrial radiation (from ground): 0.28 mSv/year[5]
•        Natural radiation in the human body: 0.40 mSv/year[5]
•        Radiation produced by the granite of the United States Capitol building: 0.85 mSv/year[7]
•        Average individual background radiation dose: 2 mSv/year; 1.5 mSv/year for Australians, 3.0 mSv/year for Americans[1][8][3]
•        New York-Tokyo flights for airline crew: 9 mSv/year[8]
•        Atmospheric sources (mostly radon): 2 mSv/year[9][5]
•        Total average radiation dose for Americans: 6.2 mSv/year[10]
•        Smoking 1.5 packs/day: 13-60 mSv/year[7][11]
•        Current average limit for nuclear workers: 20 mSv/year[8]
•        Background radiation in parts of Iran, India and Europe: 50 mSv/year[8]
•        Lowest clearly carcinogenic level: 100 mSv/year[8]
•        Elevated limit for workers during Fukushima emergency: 250 mSv/year[12]
[edit] Dose limit examples
•        Criterion for relocation after Chernobyl disaster: 350 mSv/lifetime[8]
•        In most countries the current maximum permissible dose to radiation workers is 20 mSv per year averaged over five years, with a maximum of 50 mSv in any one year. This is over and above background exposure, and excludes medical exposure. The value originates from the International Commission on Radiological Protection (ICRP), and is coupled with the requirement to keep exposure as low as reasonably achievable (ALARA) – taking into account social and economic factors.[13]
•        Public dose limits for exposure from uranium mining or nuclear plants are usually set at 1 mSv/yr above background.[13]
[edit] Symptom benchmarks
Symptoms of acute radiation (within one day):[14]
•        0 – 0.25 Sv (0 - 250 mSv): None
•        0.25 – 1 Sv (250 - 1000 mSv): Some people feel nausea and loss of appetite; bone marrow, lymph nodes, spleen damaged.
•        1 – 3 Sv (1000 - 3000 mSv): Mild to severe nausea, loss of appetite, infection; more severe bone marrow, lymph node, spleen damage; recovery probable, not assured.
•        3 – 6 Sv (3000 - 6000 mSv): Severe nausea, loss of appetite; hemorrhaging, infection, diarrhea, peeling of skin, sterility; death if untreated.
•        6 – 10 Sv (6000 - 10000 mSv): Above symptoms plus central nervous system impairment; death expected.
•        Above 10 Sv (10000 mSv): Incapacitation and death

秋之皓月

3月21日，东京电力公司公布的福岛第一核电站3号反应堆冒烟照片。当天，东京电力公司宣布，下午3点55分前后，福岛第一核电站3号反应堆所在建筑物的东南侧冒出灰烟，但是没有听到爆炸声。

　　据日本共同社报道，对福岛第一核电站1、2、3与4号核反应堆的恢复通电工作已经恢复。

　　此外，国际原子能机构官员21日称，在距离福岛第一核电站20公里的一个地区检测结果显示，那里的辐射量超过正常水平1600倍。

　　他说，国际原子能机构在福岛县浪江镇所收集的数据显示，那里的辐射量达到每小时161微西弗。

每小时161微西弗 ＝ 每小时161000毫西弗！！！

所以20公里的疏散区太小， 政府的数字， 10X 才安全

秋之皓月

14# not4weak


改了

farshine

3月21日，东京电力公司公布的福岛第一核电站3号反应堆冒烟照片。当天，东京电力公司宣布，下午3点55分前后，福岛第一核电站3号反应堆所在建筑物的东南侧冒出灰烟，但是没有听到爆炸声。

　　每小时161微西弗 ＝ 每小时161000毫西弗！！！

所以20公里的疏散区太小， 政府的数字， 10X 才安全
秋之皓月 发表于 2011-3-22 02:26

老秋一定是吃了受辐射的海鲜了,
换算关系应该是：
1msv=1000usv
1毫西弗=1000微西弗

轻暮

谁能告诉我电脑和手机的辐射差不多是多少啊？

黄道吉日

老秋一定是吃了受辐射的海鲜了,
换算关系应该是：
1msv=1000usv
1毫西弗=1000微西弗
farshine 发表于 2011-3-22 09:09

老秋卖热狗找零也这么算就好了。。。文学大妞？。。。

黄道吉日

故事是酱紫发生的。。。

老秋：日本辐射量已经达到每小时161微西弗=每小时161000毫西弗！！！

发闪：哇，那么高！1毫西弗=1000微西弗！那岂不是每小时=161000000微西弗！！！！！！

老秋：又增高了1000倍？哇，161000000微西弗！！！！！！=161000000000毫西弗！！！！！！以后再也不吃鱼了！西海岸的同学们，赶快逃亡吧！

不弱：受不了了，受不了了！我要吼！立即给议员写信，美军接管抢险！

坐爱：号外！号外！东京沉没！东京沉没！小日本终于断根了！

。。。

farshine