Which statement is correct about the NCRP MPD?

Which statement is correct about the NCRP MPD?

• A. It applies to occupational exposure only
• B. It applies to non-occupationally exposed adults
• C. It applies to all exposures regardless of occupation
• D. It applies only to X-ray technicians

Answer: (B)

Maximum Permissible Dose is a dose limit designed to protect people who are not engaged in radiation work. It sets the allowable exposure for the general public, including non-occupationally exposed adults, to keep their risk from radiation within acceptable bounds. Separate, higher limits exist for occupational exposure, recognizing that workers who operate radiographic equipment have different risk considerations. Because of this distinction, the MPD is not about only X-ray technicians or about all exposures regardless of occupation. It specifically targets non-occupational exposure, making that option the best fit.