Fukushima prefectural government has been conducting WBC monitoring of the Fukushima residents since June 2011. New results of WBC monitoring conducted on 4,120 residents in March were released on April 26. Altogether, 123,050 individuals have been monitored at present and the results suggest that the committed effective doses of more than 99.9 % of examinees are less than 1mSv. Based on these data, the prefecture said that internal exposure doses are less than the level to affect health of the examinees. Current WBC monitoring prioritizes the examination of children and pregnant women.
In addition to the prefectural government, some of the municipal governments have also implemented the WBC monitoring which are as follows.
Iwaki city government monitored 46,557 residents and all their committed effective doses were 1mSv or below.
Fukushima city government monitored 45,802 residents and all their committed effective doses were below 1mSv.
Date city government monitored 43,261 residents and all their committed effective doses were below 1mSv.
Koriyama city government monitored 25,009 residents and all the committed effective doses were below 1mSv.
Motomiya city government monitored 13,256 residents and all the committed effective doses were 1mSv or below.
∗ Committed effective dose represents the accumulative dose of internal radiation exposure for the dose of 50 years for adults, for the dose until 70 years old for children.