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Plant hazard

Violent fluctuations of hydrogen concentration in reactor1

Hydrogen concentration of reactor 1 has been fluctuating violently since 6/3/2012. On the daily press conference of 6/4/2012, Tepco explained hydrogen gas is heterogeneous inside of PCV, the indicator captured the

Plant hazard Spent Fuel Pools

In case coolant system stopped in any SFP, Tepco can’t measure temperture

Related to this article..[Emergency] Coolant system of reactor 4 stopped In the daily press conference of 4/27/2012, Tepco stated they lose the manner to measure the temperature of each SFP

Plant hazard

One of the last two heating gauges was broken in reactor 2

  There were only two heating gauges in the bottom of container vessel of reactor 2, but Tepco decided to abandon one of them. Now only one remains working. 2号機格納容器の底部温度を計る温度計は2つしか残っていませんでしたが、東電はそのうち1つをさらに監視対象から外すことを決めました。現在、残っている温度計は1つのみです。

Plant hazard

Reactor 2 may be over 90℃

Reactor may be 90℃, not 70℃. Cold shut down is based on the assumption that the heat gauge has 20℃ of error. The definition of “cold” shut down is when