“Estimates of average annual dose equivalent to the whole body from various sources of irradiation received by members of the U.S. population”的意思、由来-百科全书

Estimates of average annual dose equivalent to the whole body from various sources of irradiation received by members of the U.S. population

Table

Estimates of average annual dose equivalent to the whole body from various sources of irradiation received by members of the U.S. population

source of radiation average dose rates (mSv/year)

Natural

environmental

cosmic radiation 0.27 (0.27–1.30)*

terrestrial radiation 0.28 (0.30–1.15)**

internal radioactive isotopes 0.36

subtotal 0.91

Man-made

environmental

technologically enhanced 0.04

global fallout 0.04

nuclear power 0.002

medical

diagnostic 0.78

radiopharmaceuticals 0.14

occupational 0.01

miscellaneous 0.05

subtotal 1.06

total 1.97

*Values in parentheses indicate range over which average levels for different states vary with elevation.

**Range of variation (shown in parentheses) attributable largely to geographic differences in the content of potassium-40, radium, thorium, and uranium in the Earth's crust.

See as table:

词条	Estimates of average annual dose equivalent to the whole body from various sources of irradiation received by members of the U.S. population
释义	Estimates of average annual dose equivalent to the whole body from various sources of irradiation received by members of the U.S. population Table Estimates of average annual dose equivalent to the whole body from various sources of irradiation received by members of the U.S. population source of radiation average dose rates (mSv/year) Natural environmental cosmic radiation 0.27 (0.27–1.30)* terrestrial radiation 0.28 (0.30–1.15) internal radioactive isotopes 0.36 subtotal 0.91 Man-made environmental technologically enhanced 0.04 global fallout 0.04 nuclear power 0.002 medical diagnostic 0.78 radiopharmaceuticals 0.14 occupational 0.01 miscellaneous 0.05 subtotal 1.06 total 1.97** Values in parentheses indicate range over which average levels for different states vary with elevation. Range of variation (shown in parentheses) attributable largely to geographic differences in the content of potassium-40, radium, thorium, and uranium in the Earth's crust. See as table:*
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