Why don’t they have suits on that cover the whole face and head? Or is the image above from before the earthquake?
No suit in this world will protect you against gamma radiation.
1,000 mSv single dose
Causes (temporary) radiation sickness such as nausea and decreased white blood cell count, but not death. Above this, severity of illness increases with dose
5,000 mSv SINGLE dose
Would kill about half those receiving it within a month
And since this workers are there since days and have constantly been exposed to radiation (sometimes up to 3000 Msv) you can figure out how high their chances are to survive this.