3.2 ALARA Program

The maximum permissible occupational dose limits established by regulation are based on limiting individual radiation dose to what is considered to be an acceptable level of occupational risk.  Although radiation doses below the regulatory limits are presumed to pose little health risk, it is assumed that any radiation exposure may carry some risk.  Therefore, regulation requires that the University provide a program designed to reduce exposures to As Low As Reasonably Achievable (ALARA) to the extent practical, utilizing procedural and engineering controls.

The University’s ALARA Program provides a process for the RSC and the RSO to review all occupational radiation exposure reports; and investigate any occurrences where occupational exposures exceed established program action levels.  Additionally, EHS provides instruction on implementing ALARA practices to minimize radiation exposure.

Action Levels

The University has established investigational levels for occupational exposure to radiation.

ALARA Level I

EHS contacts individuals and their supervisor/department head if their cumulative quarterly exposure exceeds any of the action levels listed in the table below.

ALARA Level II

In addition to “Level I” notifications, EHS requires the completion of a questionnaire for “Action Level II” exposures and may include a meeting with the staff member and their supervisor to discuss the individual’s exposure and potential actions.

ALARA 
Level I

ALARA 
Level II

 

200
mrem/month
400
mrem/month
Whole Body Deep Dose Equivalent
(Head, trunk, active blood-forming organs & reproductive organs)
2000
mrem/month
4000
mrem/month
Whole Body Shallow Dose Equivalent
(Skin of the whole body)
600
mrem/month
1200
mrem/month
Lens of Eye Dose Equivalent
2000
mrem/month
4000
mrem/month
Extremities
(Hands, forearms, feet and ankles)