What methods are used to limit internal disposition of radioactive material?

What methods are used to limit internal disposition of radioactive material?

• A. Respiratory protection and engineering controls
• B. Time and distance only
• C. PPE only
• D. Medical surveillance

Answer: (A)

Internal contamination happens when radioactive material gets into the body through inhalation, ingestion, or absorption. To limit this, the focus is on preventing uptake rather than just positioning oneself relative to the source. Engineering controls reduce the amount of radioactive material in the air and keep it contained (for example, proper ventilation, local exhaust, containment, and negative-pressure work areas), which lowers the likelihood of inhalation. Respiratory protection directly reduces the amount a worker breathes in if contaminants are present, providing a barrier against inhalation. PPE alone isn’t enough for preventing internal deposition because it relies on correct use and doesn’t stop material from entering the body if it becomes deposited on skin or is ingested, and medical surveillance watches for effects after exposure rather than preventing uptake. Time and distance mainly affect external exposure; they don’t sufficiently address internal uptake. So combining respiratory protection with engineering controls directly targets preventing internal contamination by reducing and blocking uptake of radioactive material.

Internal contamination happens when radioactive material gets into the body through inhalation, ingestion, or absorption. To limit this, the focus is on preventing uptake rather than just positioning oneself relative to the source. Engineering controls reduce the amount of radioactive material in the air and keep it contained (for example, proper ventilation, local exhaust, containment, and negative-pressure work areas), which lowers the likelihood of inhalation. Respiratory protection directly reduces the amount a worker breathes in if contaminants are present, providing a barrier against inhalation.

PPE alone isn’t enough for preventing internal deposition because it relies on correct use and doesn’t stop material from entering the body if it becomes deposited on skin or is ingested, and medical surveillance watches for effects after exposure rather than preventing uptake. Time and distance mainly affect external exposure; they don’t sufficiently address internal uptake.

So combining respiratory protection with engineering controls directly targets preventing internal contamination by reducing and blocking uptake of radioactive material.