Quizzes : Radiation Safety Limits

The answer will appear when you put your mouse over where the answer should be. The original non-quiz chart can be found here: Radiation Safety

Package Limits

white1 yellow2 yellow3

Label Surface Limit TI
White I 0.5 mR/hr N/A
Yellow II 50 mR/hr 1
Yellow III 200 mR/hr 10

Note: The TI is really just the limit at 1 meter. If a question asks what is the limit for a Yellow II package at one meter, the answer is 1mR/hr. If someone asks what is the TI of a Yellow II package, the answer is 1 (no units.) Why would the DOT do this? Who knows, but you should know that TI has no units.

Occupational Exposure

Annual Limits for Limit
TEDE 5 rem
DDE+CDE 50 rem
LDE 15 rem
SDE 50 rem
For Minors: 10% adult limit
For Embryo/Fetus: 0.5 rem for entire pregnancy

Note: TEDE=total effective dose equivalent; DDE= deep dose equivalent; CDE = committed dose equivalent; LDE = lens dose equivalent; SDE = shallow dose equivalent.

Assorted Public Exposure Limits

Annual Limits for Limit
TEDE (public) 0.1 rem
Unrestricted Area <2 mR/hr
Someone Visiting a radiotreated patient 0.5 rem
Special permission by NRC 0.5 rem

Required Signs

Sign Limit Distance
Uncontrolled Area <2 mR/hr< @30 cm
Radiation Area >5 mR/hr @30 cm
High Radiation Area >100 mR/hr @30 cm
Very High Radiation Area >500 RAD/hr @1 m

Wipe Limits

Limit
In General <22dpm/cm^2
Weekly Wipes <2200dpm/100cm^2
Package Wipes <6600dpm/300cm^2