http://fukushima-diary.com/2012/06/coolant-system-of-sfp-in-reactor2-is-stopped/
![[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order](http://fukushima-diary.com/wp-content/uploads/2012/06/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88%EF%BC%882012-06-27-9.47.00%EF%BC%89.png-450x327.jpg "[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order")
![[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order 2](http://fukushima-diary.com/wp-content/uploads/2012/06/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88%EF%BC%882012-06-27-9.48.27%EF%BC%89-450x326.png "[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order 2")
![[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order 3](http://fukushima-diary.com/wp-content/uploads/2012/06/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88%EF%BC%882012-06-27-9.48.44%EF%BC%89-450x320.png "[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order 3")
![[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order 4](http://fukushima-diary.com/wp-content/uploads/2012/06/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88%EF%BC%882012-06-27-9.48.55%EF%BC%89-450x316.png "[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order 4")
![[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order 5](http://fukushima-diary.com/wp-content/uploads/2012/06/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88%EF%BC%882012-06-27-9.49.06%EF%BC%89-450x321.png "[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order 5")
![[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order 6](http://fukushima-diary.com/wp-content/uploads/2012/06/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88%EF%BC%882012-06-27-9.49.19%EF%BC%89-450x321.png "[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order 6")
![[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order 7](http://fukushima-diary.com/wp-content/uploads/2012/06/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88%EF%BC%882012-06-27-9.49.29%EF%BC%891-450x323.png "[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order 7")
Coolant system of SFP in reactor2 is stopped
Posted by Mochizuki on June 27th, 2012 · 1 Comment
Since 14:01 of 6/27/2012, the coolant system of SFP2 has been stopped.
They confirmed the cooling pump of systemA automatically stopped by the web camera of the seismic isolation building at 14:22. They caused the short circuit to set a digital recorder of a flow meter.
They confirmed the cooling pump of systemA automatically stopped by the web camera of the seismic isolation building at 14:22. They caused the short circuit to set a digital recorder of a flow meter.
The water temperature was 22.9℃, it is estimated to increase at 0.24℃/h by Tepco.
Tepco states they confirmed no water leakage at 14:40, and the water temperature is under control.
Tepco states they confirmed no water leakage at 14:40, and the water temperature is under control.
【２号機】・6/27 14:01 使用済燃料プール代替冷却システムにおいて、異常を示す警報を免震重要棟で確認。14:22、「一
次系差流量大」の警報が発生し、運転中の冷却ポンプ（Ａ）が自動停止していることを免震重要棟
のウェブカメラで確認。14:40、現場において当該系統からの漏えいがないことを確認。なお、同シ
ステム停止時のプール水温度は 22.9℃で、プール水温度上昇率は約 0.24℃/h と評価しており、
プール水温度管理上は問題ない。原因について調査した結果、現場にて流量計のデジタルレコ
ーダー設置作業時に、ケーブルを誤って短絡させたために、「一次系差流量大」の誤信号が発生
したものと推定。今後、流量計等の健全性確認を実施し、使用済燃料プールの冷却を再開する予
定。
次系差流量大」の警報が発生し、運転中の冷却ポンプ（Ａ）が自動停止していることを免震重要棟
のウェブカメラで確認。14:40、現場において当該系統からの漏えいがないことを確認。なお、同シ
ステム停止時のプール水温度は 22.9℃で、プール水温度上昇率は約 0.24℃/h と評価しており、
プール水温度管理上は問題ない。原因について調査した結果、現場にて流量計のデジタルレコ
ーダー設置作業時に、ケーブルを誤って短絡させたために、「一次系差流量大」の誤信号が発生
したものと推定。今後、流量計等の健全性確認を実施し、使用済燃料プールの冷却を再開する予
定。
↓ 1:47 ~
and......
http://fukushima-diary.com/2012/06/reactor1-dosemeter-indicated-10-3svh-and-spiked-to-1000000-svh-to-be-out-of-order/
[Reactor1] Dosemeter indicated 10.3Sv/h and spiked to 1,000,000 Sv/h to be out of order
Posted by Mochizuki on June 27th, 2012 · 8 Comments
Following up this article..You can’t work longer than 30 mins in reactor1 because of too much radiation
The detailed data of the endoscope operation [LINK] was published.
The dose meter indicated 10.3 Sv/h near the surface of flooded water, which is 10 times higher than the radiation level measured in the basement floor of reactor2 and 3.
However, when they put the dosemeter deeper than 2m in water, it indicated 100,000~1,000,000 Sv/h and it stopped decreasing though it was lifted up. Tepco states the dosemeter went out of order.
Transparency of water was only 60cm. The pipes are severely rusted because of sea water.
In this circumstance, the total dose of a nuclear worker reaches the 50mSv of the yearly limit within 20 seconds, start having acute radiation symptom within 6 minutes such as nausea and die in an hour.
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