LOCY
WHERE YOU LIVE
Internal body radiation 0.25 mSv
Cosmic rays:
0.28 mSv/yr at sea-level
increasing
by
0.01 mSv a
year for every 50
altitude
Radiation from the earth's crust:
In chalk regions
- 0.3 mSv/yr
In sedimentary rock regions
-0.5 mSv/yr
In granite regions -1.2 mSv/yr
Housing:
m
(11 hrs indoors a day) Wooden houses 0.01 mSv/yr Brick houses 0.01 mSv/yr Granite houses 0.02mSv/yr
Nuclear power station Plant area 0.01-0.05 mSv/yr 1.5 km distant 0.007 mSv/yr 10 km distant 0.001 mSv/yr
Supposing house,
you live
in
a
brick 20 meters above sea-level near to a then each
on sedimentary rock, nuclear power station,
year you would receive a dose of radiation equivalent to 0.9 mSv.
Natural
sources
and
of
artificial
radiation
combine to give each person
an annual dose of radiation to about 2.3 equivalent
mSv.
29