ALARA - As Low as Reasonably Achievable

Action Levels for OSU

In addition to maintaining radiation dose below the limits set forth by regulatory dose limits, work with sources of ionizing radiation shall be planned and conducted to keep doses as low as reasonably achievable (ALARA).

The table below outlines the action levels for OSU’s ALARA program:

Monitoring Type

Action Level

Action

Shallow Dose Equivalent (badge, rings)

>0 mrem

individual/PD notification

non-ADRI

≥ 500 mrem cumulative (annual)

ADRI

Deep Dose Equivalent (badge)

>0 mrem

individual/PD notification

non-ADRI

≥50 mrem

ADRI

Thyroid

All thyroid scans

individual/PD notification

non-ADRI

50 mrem CDE

ADRI

Unrestricted Area

50 mrem cumulative

ADRI

100 mrem cumulative

Modify facility and/or procedure

 ADRI = Abnormal Dosimeter Reading Investigation.  This is an investigation conducted by Radiation Safety to attempt to reduce exposure to zero if possible.