RADIATION DOSE

Occupational exposure

• in the course of their work, with the exception of exposures excluded from the Standards

• exposures from practices or source exempted by the standard

Medical exposure

• by persons, other than those occupationally exposed, knowingly while voluntarily helping in the support and comfort of patients;

• by volunteers in a programme of biomedical research involving their exposure

Public exposure

• members of the public from radiation sources,

• excluding any occupational or medical exposure and the normal local natural background radiation

• but including exposure from authorized sources and practices and from intervention situations.

20 mSv per year

Occupational dose limit

Effective dose: the average effective dose limit per year over a 5-year period.

50 mSv in any single year

Occupational dose limit

Effective dose: the maximum dose allowed in one particular year under this limit.

150 mSv per year

Occupational dose limit: The lens of the eye

500 mSv per year

Occupational dose limit: The skin

500 mSv per year

Occupational dose limit: The hands and feet

6 mSv per year

apprentices of 16 to 18 years of age

Effective dose:

50 mSv per year

apprentices of 16 to 18 years of age

Equivalent dose: to the lens of the eye

150 mSv per year

apprentices of 16 to 18 years of age

Equivalent dose: to the extremities or the skin

1 mSv per year

Public

Effective dose:

15 mSv per year

Public

Annual equivalent dose: lens of the eye

50 mSv per year

Public

Annual equivalent dose:the skin

5 mSv, 1 mSv

In special circumstances, an effective dose of up to blank in a single year provided that the average dose over five consecutive years does not exceed blank per year.