July 19, 2012 tweets translated by Fukushima Diary:
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.
200 ~ 300mREM/hr is quite high. The radiation level of normal new fuel assembly is only 1/100 of that ?
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, highly radioactive chips can be attached. I don’t think they are activated.
- TEPCO: Nuclear fuel rods in No. 4 spent fuel pool are "confirmed to be damaged" -- First time damage revealed at any pool
- Iodine-131 in No. 4 spent fuel pool at 22,000 times above normal
Published: July 19th, 2012 at 10:58 pm ET