Recent estimates of cancer risk from low-let ionizing radiation and radiation protection limits

摘要: Abstract Estimates of the risk cancer induction, formerly about 1%/Sv, formed basis ICRP radiation protection limits in 1977. They have now increased to 4–5%/Sv for low doses. These increases are based mainly on new data Japanese survivors A-bombs 1945. result from accumulation 11 years more solid tumors, revisions dosimetry those exposed and improvement statistical methods projections. The application a dose rate effectiveness factor between effects at high is also an important consideration. Not only has total changed but distribution among organs. Thus effective equivalent may require modification. changes modifying NCRP thinking recommendations limits, especially workers.