Reuters interviews Fukushima worker: “I get stomach aches… They should give us a medal” — NHK: Thick steel plates cover ground due to radioactive substances
[link to enenews.com]

[snip]

They were the first news media members to be allowed to enter the area, on condition that their radiation exposure be monitored strictly. [...] Four-centimeter-thick steel plates had been put on the ground to protect staff from radioactive substances.