Dose limit value
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Dose value of an ionizing radiation fixed by the legislator
as a maximum to which a person may be exposed based on recommendations
from scientific committees. Different dose limit values are fixed for
different groups of persons. When handling radioactive substances and
ionizing radiation the principle that any unnecessary radiation exposure
is to be avoided must be observed and if unavoidable it is to be kept
as low as possible, even when within the legal limit values. The German
Radiation Protection Ordinance and the X-Ray Ordinance fixes the limit
values for occupationally exposed persons as listed in the table. Lower
values apply for occupationally exposed pregnant women and apprentices.
Tissue or organ |
Limit
|
Effektive dose |
20 mSv/year |
Organ dose: |
|
Bone marrow (red), gonads, uterus
|
50mSv/year |
Adrenals, bladder, brain, breast, lens of the eye, small intestine,
upper large intestine, kidney, liver, lung, muscle, oesophagus,
pancreas, spleen, stomach, thymus
|
150 mSv/year |
Bone surface, thyroid
|
300 mSv/year |
Ankles, feet, forearms, hands, skin
|
500 mSv/year |
Dose limits for occupationally exposed
persons
The effective dose for members of the public must not exceed 1 mSv/year.
The limit for the lens of the eye is 15 mSv/year and for the skin 50
mSv/year. The party responsible for radiation protection is required
to plan the technical rating and operation of nuclear plants such that
the following limit values are not exceeded by radioactive emissions
with exhaust air or waste water:
Effective dose and dose for gonads, uterus, red
bone marrow |
0.3 mSv/year |
Dose for adrenals, bladder, brain, breast, small intestine,
upper large intestine, kidney, liver, lung, muscle, oesophagus,
pancreas, spleen, stomach, thyroid, thymus |
0.9 mSv/year |
Dose for bone surface, skin |
1.8 mSv/year |
These dose limits shall be observed at the most unfavourable
point of effect, taking account of all relevant load paths, the dietary
and lifestyle habits of the reference person in addition to any possible
prior contamination by other plants and facilities.
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|
|
11 - 15 March 2018
Munich, Germany
30 September - 04 October 2018
Prague, Czech Republic |
