TNAG-1508-FCO40-2066-Guangdong-nuclear-power-station-project-at-Daya-Bay-safety-c-1987 — Page 144

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