Washington’s Blog 
Nov 10, 2012
Japan Times reports :
Protracted exposure to low-level radiation is associated with a significant increase in the risk of leukemia, according to a long-term study published Thursday in a U.S. research journal.
The study released in the monthly Environmental Health Perspectives was based on a20-year survey of around 110,000 workers who engaged in cleanup work related to the Chernobyl nuclear plant disaster in 1986.
Scientists from the University of California, San Francisco, the U.S. National Cancer Institute and the National Research Center for Radiation Medicine in Ukraine were among those who participated in the research.
Keigo Endo, a radiologist and president of Kyoto College of Medical Science, pointed to previous data showing an increased risk of leukemia with cumulative radiation exposure of as low as 120 millisieverts.
“The latest finding underlines the importance of long-term followup surveys. Further details of the survey should be examined to confirm specific dose levels that could cause leukemia,” Endo said.
Many nuclear scientists  agree.
Indeed, the overwhelming consensus among radiation scientists is that repeated exposure to low doses of radiation can cause cancer, genetic mutations and other severe health problems  … especially in small children .
Yet many governments pretend  that low doses of radiation are harmless. In fact, many governments have been covering up the danger from radiation for 67 years , because they want to push nuclear poweras a way to make nuclear weapons . And see this .