Which NRC Form 5 criterion pertains to monitoring and reporting internal exposure for adults?

• A. Adults likely to receive in 1 year an intake in excess of 10% ALI
• B. Minors likely to receive CEDE in excess of 0.1 REM
• C. Declared pregnant women likely to receive during the entire pregnancy a CEDE of 0.1 REM
• D. Any worker exceeding an ALI in a year

Answer: (A)

The main idea is that monitoring and reporting of internal exposure for adults is triggered when there is a real chance the person will take in more than a small fraction of the annual limit. ALI stands for Annual Limit on Intake, the amount of radioactive material whose intake would lead to regulatory dose limits for an adult. If an adult is likely to ingest or inhale more than 10% of that ALI in a year, you need to monitor their internal contamination and report the findings. This threshold keeps track of potential internal dose without overburdening monitoring for every case.

The other scenarios focus on different groups or thresholds (minors with committed dose criteria, a declared pregnant woman with fetal dose criteria, or monitoring for any worker who exceeds the ALI), which are not the adult internal-exposure trigger described by this Form 5 criterion.