73Sv/h in container vessel

During the endoscope operation of 3/26/2012, Tepco measured the radiation level of inside of container vessel. Tepco published the data the next day, 3/27/2012.

It was measured at 8 points, 50~100cm away from the wall.
The highest reading was 73Sv/h.(100,000 times higher than the radiation level of the container vessel in periodic checkup) Other readings were 31.1~57.4 Sv/h.

73Sv/h in container vessel3

 

73Sv/h in container vessel4

In this level of radiation, human starts vomiting within a minute and dies within 8 minutes. It is impossible to have human work inside of container vessel.

 

Actually, Tepco did not intend to watch the fuel debris in this endoscope operation. Tepco is assuming that the fuel is in pedestal, which is separated from where they checked with endoscope this time with concrete wall. (Like this picture below.)

 

73Sv/h in container vessel

 

To see where Tepco assumes the fuel debris is, they have to put the camera under the pressure vessel, surrounded by the concrete of pedestal. About this potential attempt, actual Fukushima worker Happy11311 tweeted like this below.

 

 

 

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The highest reading of 73 Sv/h was lower than I thought, but no one can get close to there. Probably it is higher than 1000Sv/h  inside or in front of the entrance of the pedestal. The endoscope used this time can’t resist the radiation of  higher than 1000Sv/h so it would be over scale.

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<Translate>

The fuel debris has not been checked yet, but this operation made it clear that it would take considerable amount of time to fill container vessel with water as Tepco is planning, or it would be simply impossible. and they are planning to take out the fuel in 10 years but it would take way more than 10 years. I don’t know how long it takes.

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