Info from the Report of the United Nations Scientific Committee on the Effects of Atomic Radiation
Fifty-ninth session (21-25 May 2012)
(a) To date, there have been no health effects attributed to radiation exposure observed among workers, the people with the highest radiation exposures. To date, no health effects attributable to radiation exposure have been observed among children or any other member of the population;
(b) As of 31 January 2012, a total of 20,115 occupationally exposed people, comprising company workers (17 per cent) and external contractors (83 per cent) of the Tokyo Electric Power Company (TEPCO), were involved in the on-site mitigation activities. About 66 per cent of the workforce are reported to have received effective doses equal to or below 10 millisieverts (mSv). In addition, rescuers and volunteers were occupationally exposed. Six TEPCO workers received effective doses above 250 mSv (the maximum reported dose as of 31 January 2012 was 679 mSv); the largest part of those doses resulted from intakes of 131I, 134Cs and 137Cs. About 170 occupationally exposed people received effective doses above 100 mSv. It should be emphasized that there are no data available in the open literature that allow estimates to be made of thyroid dose for occupationally exposed people. The Committee has requested further information from the Japanese authorities on worker doses and monitoring data;
(c) A system was established on 20 May 2011 for the management of radiation exposures and medical monitoring of occupationally exposed people involved in dealing with the emergency situation. As of 10 March 2012, none of the six deaths noted since 11 March 2011 had been attributed to exposure to ionizing radiation;
(d) Although there were several cases of occupationally exposed people with exposure to radiation from documented skin contamination, no clinically observable effects were reported.
Full report here (top link on the page):
www.unscear.org/unscear/en/data/index_right.html
