[Reactor4] Taken fuel assemblies were 100 times more radioactive than normal

Following up this article..[Reactor4] Photos and videos to take out the new fuel assemblies

Actual Fukushima worker Happy11311 commented they measured 2~3 mSv/h from the taken new fuel assemblies of SFP4, which is about 100 times higher than usual.

 

[Reactor4] Taken fuel assemblies were 100 times more radioactive than normal

<Translate>

(Happy11311)

It took 2 days to take out the fuel assemblies from 7/18 to 7/19.  I heard the radiation level was 2~3 mSv/h on surface of fuel assemblies. It is not so different from what I expected. They decontaminated them only by rinsing and wiping, but it could be lower if they decontaminated them more carefully.

(Question)

200 ~ 300mREM/hr is quite high. The radiation level of normal new fuel assembly is only 1/100 of that ?

(Happy11311)

According to Tepco’s official announcement, it was 50μSv/h after decontamination. It was 2mSv/h just after taken out. The reason why the radiation level was so high is they were cutting shroud on DSP side before 311 [Link], highly radioactive chips can be attached. I don’t think they are activated.

<End>

 

Source

 

Categories: Spent Fuel Pools

About Author