How long must records of surveys be retained according to the NRC?

The correct answer is that records of surveys must be retained for a minimum of 3 years according to the NRC (Nuclear Regulatory Commission). This requirement is established to ensure that facilities maintain adequate documentation of their compliance with radiation safety standards. Keeping survey records for at least 3 years allows for proper monitoring and oversight of radiation levels, ensuring the safety of both workers and the public. Additionally, this timeframe provides a historical reference that can be crucial during regulatory inspections, audits, or any investigations regarding radiation safety practices.

It's essential to recognize that while some records may be retained longer based on specific regulations or the nature of the activity, the 3-year requirement is the minimum set by the NRC. It emphasizes the importance of maintaining a consistent practice in recording and retaining safety-related survey data.