03/23/2013
It is news of TBSradio.03/21/2013 for from 17:05 to 17:07 . Tepco.
and NHKnews. Wiki.
①Tepco. The Fukushima first Nuclear Power Plant first unit restored a power supply, and an apparatus has begun to just operate.
In addition, the plan of the operation of the three or four machine is 20:00 tonight.
②Tepco so far of the spent nuclear fuel pool of the fourth unit was pointed out that inclined. Denied Tepco each time,; but Tepco is 03/21/2013. today I admitted that the spent nuclear fuel pool of the fourth unit inclined formally.
That means,
①is. Why , it's now?
②is. Tepco has recognized the danger-related thing that It added to of the collapse of fourth nuc.unit building.
Therefore,
◦ I sail up the situation of the Fukushima first Nuclear Power Plant fourth unit for chronological order.
The Fukushima first Nuclear Power Plant fourth unit was during periodical inspection at the time of the accident of March, 2011.
However, still a hydrogen explosion was caused. With the risk same all the nuclear power plants shut down now in the whole country it means. We have to do decommissioning early.
By the way, quake resistance is concerned about since an accident about this fourth unit that a wall and a pillar were greatly broken by a hydrogen explosion.
※Reference "Tepco." Say; "fourth nuc.unit building does not incline, and there cannot be the thing broken by an earthquake including a fuel pool"
http://blog.goo.ne.jp/tarutaru22/e/777bb09b36406ba8ab652ba6c8b8708b
◆It is declined by a Fukushima first Nuclear Power Plant fourth unit obstacle.
05/26/2012 13:00 NHK news
In the Fukushima first Nuclear Power Plant fourth unit where it is greatly broken by a hydrogen explosion, and quake resistance is concerned about, it is Tepco. But, as a result of having checked a degree of leaning caused by the swelling of the outer wall of fourth nuc.unit building more, a degree of leaning bigger than an investigation of last month was found newly.
As a result of analysis, it is Tepco. It is said that , the quake resistance of whole fourth nuc.unit building and the pool of the fourth unit do not have the problem.
A degree of leaning caused by swelling considered that it was possible in the bomb blast of the hydrogen explosion in the west of fourth nuc.unit building was confirmed, and, in the Fukushima first Nuclear Power Plant fourth unit, inclining was approximately half of the limit level of the Building Standard Act with 3.3 centimeters for 13 meters in height of the wall last month.
Tepco. But, as a result of having checked it more this month; the degree of leaning of the outer wall of the west and the south side of fourth nuc.unit building was confirmed as far as was wide, and 4.6 centimeters and a thing bigger than an investigation in last month were found in the western third floor part for 13 meters in height newly.
The degree of leaning is that It's less than a limit level determined in Building Standard Act at all places.
In the used fuel pool in the upper part of fourth nuc.unit building of the fourth unit, 1,535 fuel that there is the most it is kept in Fukushima first Nuclear Power Plant, but as a result of having analyzed it because whole fourth nuc.unit building and the pool are supported at the pillars except the outer wall which a degree of leaning was found in, Tokyo Electric does it in quake resistance if there is not the problem.
◆May 30, 2012 Tepco. where water does not leak the fourth unit use finished fuel pool structurally Tokyo Electric official HP
http://www.tepco.co.jp/nu/fukushima-np/info/index-j.html
Besides, 1,535 of waste fuel's casks aggregate enters the fuel pool of the fourth unit in Fukushima Nuclear Power Plant. When water evaporates, and a lot of calorific value can dissolve fuel than others machine as for this, it is pointed out that there is the risk that radioactive material is released.
Because the wall which supported a used fuel pool in fourth nuc.unit building of the fourth unit was broken, I installed a steel pillar made which supported a pool newly and reinforced it with concrete in future.
About this problem, it is Tepco. About the quake resistance with an outer wall of fourth nuc.unit building of the Fukushima first Nuclear Power Plant having swelled out under the influence of a hydrogen explosion on June 25, 2012, It submitted a report, "there was not the problem" to Ministry of Economy, Trade and Industry Nuclear and Industrial Safety Agency.
There was the swelling near third floor floor from the second floor of the west wall and, according to the report, was up to 4.6 centimeters. However, Tokyo Electric is viewing! Crazing more than 1 millimeter in width was not found and concluded that the influence that a calculation gave quake resistance was small.
However,
In the fourth unit, it is Tepco. But, as a result of having checked a degree of leaning caused by the swelling of the outer wall of fourth nuc.unit building more, a degree of leaning bigger than an investigation of May, 2012 was found newly.
In the Fukushima first Nuclear Power Plant fourth unit, a degree of leaning caused by swelling considered that it was possible in the bomb blast of the hydrogen explosion in the west of fourth nuc.unit building in May was confirmed, and inclining was approximately half of the limit level of the Building Standard Act with 3.3 centimeters for 13 meters in height of the wall.
Tepco. But, as a result of having checked it more June; the degree of leaning of the outer wall of the west and the south side of fourth nuc.unit building was confirmed as far as was wide, and 4.6 centimeters and a thing bigger than an investigation in last month fourth were found in the western third floor part for 13 meters in height newly.
In the used fuel pool in the upper part of fourth nuc.unit building of the fourth unit, 1,535 fuel that there is the most it is kept in Fukushima first Nuclear Power Plant according to the said article.
As a result of being defeated in this, and having analyzed it because whole fourth nuc.unit building and the pool are supported at the pillars except the outer wall which a degree of leaning was found in in Tokyo Electric, we do it in quake resistance if there is not the problem.
No, it may be said to support it by emergency measures unwillingly even if a degree of leaning may become rather more terrible.
In addition, the degree of leaning of the bigger wall which has not been yet found may be found in the part which inclined to two-thirds of the regulation level having been found newly.
Anyway it is Tepco. On April 26
"fourth nuc.unit building does not incline, and there cannot be the thing broken by an earthquake including a fuel pool"
Because It just announced.
Tepco. The water level of the tank adjacent to a spent nuclear fuel pool of the Fukushima first Nuclear Power Plant fourth unit decreased abnormally on January 1 and, on は January 2, 2012, announced the rise in water temperature, the cause with the influence of the earthquake that observed greatest seismic intensity 4 on the same day in Kanto, the Tohoku district in New Year's Day in 2012.
Tepco. は, the radioactive contaminated water in the pool flow into the nuclear reactor storage container side of the side reverse to a tank and consider it to be caused by the fact that supply of the water from a pool to a tank was cut off temporarily.
The fourth unit which an abnormal situation happens at seismic intensity 4. The cesium-137 in the spent nuclear fuel in the fourth unit is said to be 5,000 times of the Hiroshima type atom bomb.
ref.
By the Tohoku district Pacific offing earthquake that caused the East Japan great earthquake disaster of 18,550 dead person missing people by after 311 to 03/10/2013 more than seismic intensity 4: 286 times are taking place. /wiki. Tohoku district Pacific offing earthquake.
In the fuel pool of the fourth unit, the large structure including stairs and a passage, the deck which it is broken by an explosion, and vanished has dropped other than a large quantity of concrete pieces. Besides, an accident is original, and they have the effect that spent seawater for cooling and I corrode and may become fragile with fuel aggregate.
The degree of leaning situation of the fourth unit and the radioactive material over there can cut off the fate of the Japanese citizen like Leaning Tower of Pisa if a strong earthquake comes.
03/23/2013
TBSradio.03/21/2013 :17:05～17:07 news. Tepco.
and NHKnews. Wiki.
①Tepco. 今、福島第1原発1号機が電源回復し機器が稼動し始めました。
なお、3,4号機の稼動の予定は今晩の20:00です。
②Tepcoが今まで4号機の使用済み核燃料プールの傾いていると指摘されていました。その都度Tepcoは否定していましたが
Tepcoは 今日 03/21/2013. 4号機の使用済み核燃料プールの傾いていることを公式に認めました。
ということは、
①は 。えーっ 今なの
②は 。4号機建屋の倒壊の危険性増したことを認めた。
そこで、
◦福島第一原子力発電所４号機の状況を時系列的に
遡っていってみます。
福島第一原子力発電所４号機は２０１１年３月の事故時は定期検査中でした。
しかし、それでも水素爆発が起こったのです。今、全国で運転停止中の原発すべてが同じ危険性があるということですね。早く廃炉まで持っていかないと。
さて、水素爆発で壁や柱が大きく壊れたこの４号機については事故以来、耐震性が懸念されています。
※参考「Tepco. 曰く、「４号機原子炉建屋は傾いておらず、燃料プールを含め地震で壊れることはありません」
http://blog.goo.ne.jp/tarutaru22/e/777bb09b36406ba8ab652ba6c8b8708b
◆福島第一原発４号機 壁に傾き
06/26/2012 05:27 ＮＨＫニュース
水素爆発で大きく壊れ耐震性が懸念されている福島第一原子力発電所４号機で、Tepco. が建屋の外壁の膨らみによる傾きをさらに調べた結果、先月の調査より大きな傾きが新たに見つかりました。
解析の結果、Tepco. は、４号機の建屋全体やプールの耐震性に問題はないとしています。
福島第一原発４号機では、先月、原子炉建屋の西側で水素爆発の爆風でできたとみられる膨らみによる傾きが確認され、傾きは、壁の高さ１３メートルに対し３.３センチで、建築基準法の制限値の半分ほどでした。
Tepco. が今月さらに調べた結果、外壁の傾きは建屋の西側や南側の広い範囲で確認され、西側の３階部分に高さ１３メートルに対し４.６センチと、先月の調査より大きなものが新たに見つかりました。
傾きは、すべての場所で建築基準法で定められた制限値を下回っているということです。
４号機の建屋の上部にある使用済み燃料プールには、福島第一原発で最も多い燃料１５３５体が保管されていますが、東京電力は、建屋全体やプールは傾きが見つかった外壁以外の柱などで支えられていることから、解析した結果、耐震性に問題はないとしています。
◆４号機使用済燃料プールは、構造的に水が漏えいしないものになっています
2012年5月30日 Tepco. 東電公式ＨＰ
http://www.tepco.co.jp/nu/fukushima-np/info/index-j.html
しかも、４号機の燃料プールには福島原発で最も多い燃料集合体１５３５体が入っています。これは他号機より発熱量が多く、水が蒸発して燃料が溶けると、放射性物質が放出される危険性があると指摘されています。
４号機の原子炉建屋にある使用済み燃料プールを支える壁が壊れていることから、プールを支える鋼鉄製の柱を新たに設置し、今後、コンクリートで補強してきました。
この問題について、Tepco. は２０１２年６月２５日、福島第１原発４号機の原子炉建屋の外壁が水素爆発の影響で膨らんだことに伴う耐震性について、「問題はない」との報告書を経済産業省原子力安全・保安院に提出しました。
報告書によると、膨らみは西壁の２階から３階床面付近にあり、最大で４．６センチありました。ところが、東電は目視で！幅１ミリ以上のひび割れが見つからず、計算からも耐震性に与える影響は小さいと結論づけたのです。
ところがどっこい！
４号機で、Tepco. が建屋の外壁の膨らみによる傾きをさらに調べた結果、２０１２年５月の調査より大きな傾きが新たに見つかっていたのです。
福島第一原発４号機では、５月、原子炉建屋の西側で水素爆発の爆風でできたとみられる膨らみによる傾きが確認され、傾きは、壁の高さ１３メートルに対し３.３センチで、建築基準法の制限値の半分ほどでした。
Tepco. が６月さらに調べた結果、外壁の傾きは建屋の西側や南側の広い範囲で確認され、西側の３階部分に高さ１３メートルに対し４.６センチと、先月の調査より大きなものが新たに見つかりました。
４号機の建屋の上部にある使用済み燃料プールには、前述のとおり、福島第一原発で最も多い燃料１５３５体が保管されています。
これについえ、東京電力は、建屋全体やプールは傾きが見つかった外壁以外の柱などで支えられていることから、解析した結果、耐震性に問題はないとしています。
いやいやいや、応急措置で支えているのに、むしろどんどん傾きがひどくなっている可能性があるとも言えます。
また、規制値の３分の２まで傾いた部分が新たに見つかったということは、まだ見つかっていない、さらに大きな壁の傾きが見つかる可能性もあるわけです。
なにしろTepco. は4月26日に
「４号機原子炉建屋は傾いておらず、燃料プールを含め地震で壊れることはありません」
という公式見解を発表したばかりだったのですから。
Tepco. は２０１２年１月２日、福島第１原発４号機の使用済み核燃料プールに隣接するタンクの水位が １月１日異常低下し水温上昇、原因は同日２０１２年元日、関東・東北地方で最大震度４を観測した地震の影響と発表しました。
Tepco. は、プール内の放射性汚染水がタンクと逆側の原子炉格納容器側に流れ込み、一時的にプールからタンクへの水の供給が途絶えたことが原因とみています。
震度４でも異常事態が起こる４号機。４号機にある使用済み核燃料にあるセシウム１３７は、広島型原爆の５０００倍と言われています。
ref.
死者 行方不明者18,550人の東日本大震災を起こした東北地方太平洋沖地震（とうほくちほうたいへいようおきじしん）では、311以降03/10/2013までに
震度4以上: 286回起きています。/wiki.東北地方太平洋沖地震.
４号機の燃料プール内には、大量のコンクリート片のほか、爆発で壊れて吹き飛んだ階段や通路・デッキなど大型の構造物までが落下したままになっています。しかも、それらは事故当初に冷却のため海水を投入した影響もあり、燃料集合体ともども、腐食して脆くなっている可能性があるのです。
もし、強い地震が来たら、ピサの斜塔のように傾きづづけている４号機とそこの放射性物質は、日本国民の命運を絶ちかねません。
