Radiation Protection Standards, Regulations, and Licensing
Core concepts
Know the regulatory framework: NRC (10 CFR), Agreement States, and ICRP/NCRP recommendations. Understand occupational dose limits (50 mSv/y total effective dose; 150 mSv lens; 500 mSv extremities/skin), public limits (1 mSv/y), and the ALARA principle. Know licensing categories (byproduct, source, special nuclear material), the role of the RSO, and required records, surveys, and training. Understand the difference between license types (general vs specific) and the concept of possession limits. Know reporting requirements for overexposures and misadministrations.
Traps
Questions test the numeric limits and which body part they apply to. Don't confuse occupational (50 mSv) with public (1 mSv) or the lens limit (150 mSv). Remember that dose limits are for the total effective dose and that declared pregnant workers have a 5 mSv fetal limit (NCRP). Watch for the difference between NRC and Agreement State authority, and that ALARA is a process, not a single number. Reporting thresholds and timeframes are commonly tested.
Worked example / rule of thumb
A worker accumulates 20 mSv and receives 35 mSv more; total = 55 mSv, exceeding the 50 mSv annual limit. Rule of thumb: sum all occupational doses in the year before comparing to the limit.