There was an interesting story on FR from a man who listened to a guy from Russia talk about how they put radioactive things in construction materials..not realizing the harm they were doing. I can’t remember the exact story.
Radioactive materials will be in construction materials in Japan.
http://www.yomiuri.co.jp/dy/national/T110512006539.htm
“TEPCO learned about the water level of the pressure vessel after workers who entered the reactor building beginning Tuesday adjusted a water-level gauge. Previously, the reading of the water level had remained almost unchanged at about 1.6 meters below the top of fuel rods since immediately after the outbreak of the crisis at the plant following the March 11 earthquake and tsunami.”
Or, they were just lying .
Either way, you can’t trust the numbers for the other reactors since #1 was wrong and there has been a meltdown.