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Alert

Due to a lapse in appropriations, the NRC has ceased normal operations. However, excepted and exempted activities necessary to maintain critical health and safety functions—as well as essential progress on designated critical activities, including those specified in Executive Order 14300—will continue, consistent with the OMB-Approved NRC Lapse Plan.

Shallow-Dose Equivalent (SDE)

The dose equivalent at a tissue depth of 0.007 centimeter (7 mg/cm2), which applies to the external exposure of the skin of the whole body or the skin of an extremity.

Page Last Reviewed/Updated Thursday, June 22, 2023

Page Last Reviewed/Updated Thursday, June 22, 2023