How long must personnel radiation exposure records be maintained according to NRC regulations?

The requirement for maintaining personnel radiation exposure records according to NRC regulations is indeed for an indefinite period. This is important because these records are crucial for tracking an individual's radiation exposure over the course of their career. Maintaining these records indefinitely ensures that individuals can access their exposure history if needed for health assessments, safety evaluations, or any future regulatory needs, as historical exposure data can be relevant to both the individual's medical care and compliance with safety regulations.

By having these records available indefinitely, it supports long-term health surveillance and helps in the assessment of cumulative exposure to radiation, which is important for both occupational health and safety standards in the field of nuclear medicine and related practices.