What you need to know
The federal government has defined annual dose limits for radiation workers as follows:
|Body part||Dose limit|
|Whole body||5,000 mrem|
|Lens of the eye||15,000 mrem|
|Extremities, shallow, any single organ||50,000 mrem|
|Declared pregnant worker (9 months)||500 mrem|
Workers are required to wear dosimetry if they are likely to receive at least 10 percent of the annual dose limit.
EH&S is charged with enforcement of the ALARA principle. The Radiation Safety Committee and EH&S’s Radiation Safety team have determined quarterly dose levels that will trigger an ALARA investigation.
Level I may trigger an investigation, depending on the individual’s normal job duties and dose history.
Level II automatically triggers an investigation by a health physicist to determine if further action needs to be taken.
|Quarterly ALARA Investigation Levels|
|Dose||ALARA Level 1||ALARA Level 2|
Dose categories with an asterisk (*) denote a higher limit for some workers as determined by the EH&S Radiation Safety team