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『あああ福島原発事故の潜在する放射能汚染はチェルノブイリの２０倍・広島原爆の8000個分に相当する』 http://t.co/Yy2y3Dl
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福島原発事故の潜在する放射能汚染はチェルノブイリの２０倍・広島原爆の8000個分に相当する。http://t.co/SgT1qvx チェルノブイリ原発事故：広島市に投下された原子爆弾（リトルボーイ）による放出量の約400倍。
参考リンク：Ｙｏｕｔｕｂｅ：（Little boy） 検索
VIDEO - ATOMICA - Bomba Atomica (Hiroshima, Litte Boy, 06.08.45) - 00.22.avi
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From Wikipedia:http://t.co/8sNyF2N ：Arnold Gundersen said Fukushima has 20 times the potential to be released than Chernobyl.
参考リンク： Arnold Gundersen
http://en.wikipedia.org/wiki/Arnold_Gundersen
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チェルノブイリ原子力発電所事故http://t.co/SgT1qvx 広島市に投下された原子爆弾（リトルボーイ）による放出量の約400倍とする国際原子力機関 (IAEA) による記録が残されている。
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Twitter 使い方判ってないです。。失礼あったら、ごめんなさい。。 ずぼら人ですので洗い晒しでお願いします。。 但し、キムチ・麻婆豆腐に汚れた日の丸は、嫌です。。 頭悪いので懐柔されません！ ちなみにゲームDMに釣られSpammer歴1です。。 こちらからのDM扱いません。。 フォロー要注意人物です。。。
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解っています。。国外にいる妹の再三の誘い断って、すでに死す覚悟で東京に残ったのです！RT @matuoka7ocean 福島原発事故の潜在する放射能汚染はチェルノブイリの２０倍・広島原爆の8000個分に相当する。ja.wikipedia.org/wiki/%E3%83%81…
20分前
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参考：
Ｆｒｏｍ:
http://en.wikipedia.org/wiki/Fukushima_I_nuclear_accidents
Fukushima Daiichi nuclear disaster
以下抜粋：
From Wikipedia, the free encyclopedia
(Redirected from Fukushima I nuclear accidents )
"Fukushima nuclear disaster" redirects here. For the incidents at Fukushima Daini (Fukushima II), see Fukushima Daini Nuclear Power Plant .
The Fukushima I Nuclear Power Plant consists of six light water , boiling water reactors (BWR) designed by General Electric driving electrical generators with a combined power of 4.7 gigawatts, making Fukushima I one of the 25 largest nuclear power stations in the world . Fukushima I was the first nuclear plant to be constructed and run entirely by the Tokyo Electric Power Company (TEPCO).
Unit 1 is a 439 MWe type (BWR3) reactor constructed in July 1967. It commenced commercial electrical production on 26 March 1971.[40] It was designed for a peak ground acceleration of 0.18 g (1.74 m/s2) and a response spectrum based on the 1952 Kern County earthquake .[41] Units 2 and 3 are both 784 MWe type BWR-4 reactors, Unit 2 commenced operating in July 1974 and Unit 3 in March 1976. The design basis for all units ranged from 0.42 g (4.12 m/s2) to 0.46 g (4.52 m/s2).[42] [43] All units were inspected after the 1978 Miyagi earthquake when the ground acceleration was 0.125 g (1.22 m/s2) for 30 seconds, but no damage to the critical parts of the reactor was discovered.[41]
Units 1–5 have a Mark 1 type (light bulb torus ) containment structure , Unit 6 has Mark 2 type (over/under) containment structure.[41] From September 2010, Unit 3 has been fueled by mixed-oxide (MOX) fuel .[44]
At the time of the accident, the units and central storage facility contained the following numbers of fuel assemblies:[45]
Reactor Fuel Assemblies
Unit 1
400
Unit 2
548
Unit 3
548
Unit 4
0
Unit 5
548
Unit 6
764
Central Storage
0
Spent Fuel Assemblies
Unit 1
292
Unit 2
587
Unit 3
514
Unit 4
1331
Unit 5
946
Unit 6
876
Central Storage
6375
New Fuel Assemblies
Unit 1
100
Unit 2
28
Unit 3
52
Unit 4
204
Unit 5
48
Unit 6
64
Central Storage
N/A
Central fuel storage areas
Used fuel assemblies taken from reactors are initially stored for at least 18 months in the pools adjacent to their reactors. They can then be transferred to the central fuel storage pond.[3] This contains 6375 fuel assemblies and was reported "secured" with a temperature of 55 °C. After further cooling, fuel can be transferred to dry cask storage, which has shown no signs of abnormalities.[301] On 21 March, temperatures in the fuel pond had risen a little to 61 °C and water was sprayed over the pool.[3] Power was restored to cooling systems on 24 March and by 28 March temperatures were reported down to 35 °C.[121]
Radiation levels and radioactive contamination
Main article: Radiation effects from Fukushima I nuclear accidents
Radioactive material has been released from the Fukushima containment vessels as the result of deliberate venting to reduce gaseous pressure, deliberate discharge of coolant water into the sea, and accidental or uncontrolled events. Junichi Matsumoto, acting head of TEPCO's Nuclear Power & Plant Siting Division, acknowledged the seriousness of the Fukushima accident at a [12 April] press conference stating, "although the details of the [Chernobyl and Fukushima] accidents are different, from the standpoint of how much radiation has been released, [Fukushima] is equal to or more serious than Chernobyl."[302]
Using Japanese Nuclear Safety Commission numbers, Asahi Shimbun reported that by 24 March the accident might have emitted 30,000 to 110,000 TBq of iodine-131 .[303] The highest reported radiation dose rate outside was 1000 mSv/h on 16 March.[304] On 29 March, at times near Unit 2, radiation monitoring was hampered by a belief that some radiation levels may be higher than 1000 mSv/h, but that "1,000 millisieverts is the upper limit of their measuring devices".[183] The maximum permissible dose for Japanese nuclear workers was increased to 250 mSv/year, for emergency situations after the accidents.[305] TEPCO has been criticized in providing insufficient safety equipment for its workers, including accusations of a lack of monitoring and decontamination equipment, and for giving the most dangerous work to subcontractors.[306] [307] [308] [309]
The Japanese Ministry of Health, Labour and Welfare announced that levels of radioactivity exceeding legal limits had been detected in milk produced in the Fukushima area and in certain vegetables in Ibaraki. On 23 March, Tokyo drinking water exceeded the safe level for infants, prompting the government to distribute bottled water to families with infants.[310] Seawater near the discharge of the plant elevated levels of iodine-131 were found on 22 March, which had increased to 3,355 times the legal limit on 29 March.[citation needed ] Also concentrations far beyond the legal limit were measured for caesium-134 and caesium-137 were more than 100 times above the limit.[citation needed ]
Accident rating
The severity of the nuclear accident is provisionally[346] rated 7 on the International Nuclear Event Scale (INES). This scale runs from 0, indicating an abnormal situation with no safety consequences, to 7, indicating an accident causing widespread contamination with serious health and environmental effects. Prior to Fukushima, the Chernobyl disaster was the only level 7 accident on record, while the Three Mile Island accident was a level 5 accident.
The Japan Atomic Energy Agency initially rated the situation at Unit 1 below both of these previous accidents; on 13 March it announced it was classifying the event at level 4, an "accident with local consequences".[347] On 18 March it raised its rating on Units 1, 2 and 3 to Level 5, an "accident with wider consequences". It classified the situation at Unit 4 as a level 3 "serious incident".[348]
Several parties disputed the Japanese classifications, arguing that the situation was more severe than they were admitting at the time. On 14 March, three Russian experts stated that the nuclear accident should be classified at Level 5, perhaps even Level 6.[349] One day later, the French nuclear safety authority ASN said that the Fukushima plant could be classified as a Level 6.[350] as of 18 March[update] , the French nuclear authority —and as of 15 March, the Finnish nuclear safety authority —estimated the accidents at Fukushima to be at Level 6 on the INES.[351] [352]
On 24 March, a scientific consultant for noted anti-nuclear environmental group Greenpeace , working with data from the Austrian ZAMG [353] and French IRSN , prepared an analysis in which he rated the total Fukushima accident at INES level 7.[354]
The Asahi Shimbun newspaper reported on 26 March that the accident might warrant level 6, based on its calculations.[303] The Wall Street Journal stated that Japan's NISA would make any decision on raising the level.[355] INES level 6, or "serious accident", had only been applied to the Kyshtym disaster (Soviet Union, 1957), while the only level 7 was Chernobyl (Soviet Union, 1986). Previous level 5 accidents included the Windscale fire (United Kingdom, 1957); the Lucens reactor (Switzerland, 1969); Three Mile Island (United States, 1979); and the Goiânia accident (Brazil, 1987).
Assessing "seriousness" as partial or full meltdown at a civilian plant, The New York Times reported on 3 April that based on remote sensing, computer "simulations suggest that the number of serious accidents has suddenly doubled, with three of the reactors at the Fukushima Daiichi complex in some stage of meltdown." The Times counted three previous civilian meltdowns, from World Nuclear Association information: Three Mile Island; Saint-Laurent Nuclear Power Plant (France, 1980, INES level 4); and Chernobyl.[356]
On 11 April, the Japanese Nuclear and Industrial Safety Agency (NISA) temporarily raised the disaster at Fukushima Daiichi to Level 7 on the INES scale, by considering the whole event and not considering each reactor as an individual event per se (rated between 3 and 5). This would make Fukushima the second Level 7 "major accident" in the history of the nuclear industry; having said that, radiation released as a result of the events at Fukushima was, as of 12 April, only approximately 10% of that released as a result of the accident at Chernobyl (1986), also rated as INES Level 7.[346] [357]
Arnold Gundersen said Fukushima has 20 times the potential to be released than Chernobyl. Hot spots are being found 60 to 70 kilometres away from the reactor (further away than they were found from Chernobyl), and the amount of radiation in many of them is the amount that caused areas to be declared no-man's-land for Chernobyl.[358]
This page was last modified on 30 June 2011 at 13:02.
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From:
http://ja.wikipedia.org/wiki/%E3%83%81%E3%82%A7%E3%83%AB%E3%83%8E%E3%83%96%E3%82%A4%E3%83%AA%E5%8E%9F%E5%AD%90%E5%8A%9B%E7%99%BA%E9%9B%BB%E6%89%80%E4%BA%8B%E6%95%85
チェルノブイリ原子力発電所事故
以下抜粋：
チェルノブイリ原子力発電所事故（チェルノブイリげんしりょくはつでんしょじこ）とは、1986年4月26日1時23分（モスクワ時間 ※UTC+3）にソビエト連邦（現：ウクライナ）のチェルノブイリ原子力発電所4号炉で起きた原子力事故。後に決められた国際原子力事象評価尺度 (INES) において最悪のレベル7（深刻な事故）の参考事例として知られている。なお、レベル7の事故（深刻な事故）は歴史上、暫定評価レベル7（深刻な事故）の福島第一原子力発電所事故とチェルノブイリ原子力発電所4号炉で起きた原子力事故の二つしかない。
当時、チェルノブイリ原子力発電所にはソ連が独自に設計開発した黒鉛減速沸騰軽水圧力管型原子炉(RBMK)のRBMK-1000型を使用した4つの原子炉が稼働しており、そのうち4号炉が炉心溶融（世間一般でいう｢メルトダウン｣）ののち爆発し、放射性降下物がウクライナ・白ロシア（ベラルーシ）・ロシアなどを汚染した。事故後のソ連政府の対応の遅れも相まって被害が拡大・広範化し、福島第一原子力発電所事故と並ぶ、史上最悪の原子力事故のひとつとされている。
1991年のソ連崩壊以後は原子力発電所が領土内に立地しているウクライナに処理義務がある。2010年現在もなお、原発から半径30km以内の地域での居住が禁止されるとともに、原発から北東へ向かって約350kmの範囲内にはホットスポットと呼ばれる局地的な高濃度汚染地域が約100箇所にわたって点在し、ホットスポット内においては農業や畜産業などが全面的に禁止されており、また、その周辺でも制限されている地域がある。
この規模の原発事故は当該事故と2011年に発生した福島第一原子力発電所事故の他に例がなく、原子力開発の歴史上で最悪の事故と言われている。
事故当時、爆発した4号炉は操業休止中であり、原子炉が止まった場合を想定した実験を行っていた。この実験中に制御不能に陥り、炉心が融解、爆発したとされる。爆発により、原子炉内の放射性物質[注釈 1]が大気中に量にして推定10t前後[要出典]、14エクサベクレル に及び放射性物質が放出された[1] 。
これに関しては、広島市に投下された原子爆弾（リトルボーイ）による放出量の約400倍とする国際原子力機関 (IAEA) による記録が残されている[要出典]。詳細は影響の部分を参照の事。
最終更新 2011年6月21日 (火) 11:22 （日時は個人設定 で未設定ならばUTC ）。
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