دانلود کتاب Sources, effects and risks of ionizing radiation : United Nations Scientific Committee on the Effects of Atomic Radiation : UNSCEAR 2012 report to the General Assembly with scientific annexes.

1. Since the establishment of the United Nations Scientific Committee on the
Effects of Atomic Radiation by the General Assembly in its resolution 913 (X) of
3 December 1955, the mandate of the Committee has been to undertake broad
assessments of the sources of ionizing radiation and its effects on human health and
the environment.1 In pursuit of its mandate, the Committee thoroughly reviews and
evaluates global and regional exposures to radiation, and also evaluates evidence of
radiation-induced health effects in exposed groups, including survivors of the
atomic bombings in Japan and people exposed after the reactor accident at
Chernobyl. The Committee also reviews advances in the understanding of the
biological mechanisms by which radiation-induced effects on human health or on
non-human biota can occur. Those assessments provide the scientific foundation
used, inter alia, by the relevant agencies of the United Nations system in
formulating international standards for the protection of the general public and
workers against ionizing radiation;2 those standards, in turn, are linked to important
legal and regulatory instruments.

2. Exposure to ionizing radiation arises from sources such as natural background
radiation, including from radon; medical diagnostic and therapeutic procedures;
nuclear weapons testing; electricity generation, including by means of nuclear
power; events such as the nuclear power plant accidents at Chernobyl in 1986 and
following the great east-Japan earthquake and tsunami of March 2011; and
occupations that increase exposure to artificial or natural sources of radiation.