NRRPT Decontamination & Exposure Prevention — Questions and Answers

Question 1: What is the primary goal of decontamination?

Add heat to surfaces
Enhance visibility
Remove radioactive contamination (Correct answer)
Reduce lighting

Correct answer: Remove radioactive contamination

The primary goal of decontamination is to physically remove or significantly reduce radioactive materials from surfaces, equipment, or individuals. This process aims to lower radiation levels, prevent the spread of contamination to uncontaminated areas, and minimize potential exposure risks to personnel. Effective decontamination is crucial for maintaining a safe working environment.

Question 2: Which method is typically used for skin decontamination?

Scrubbing with alcohol
Using a fire hose
Soap and water wash (Correct answer)
Applying wax

Correct answer: Soap and water wash

For most external skin contamination, a gentle wash with mild soap and lukewarm water is the recommended method for decontamination. This approach helps to physically remove radioactive particles from the skin without causing irritation or abrasion, which could potentially facilitate the absorption of radioactive material into the body. Multiple washes may be necessary.

Question 3: How can internal contamination be prevented?

Eat near sources
Touch face often
Use respiratory protection and gloves (Correct answer)
Walk barefoot

Correct answer: Use respiratory protection and gloves

Internal contamination occurs when radioactive materials enter the body through inhalation, ingestion, or absorption through the skin. Using respiratory protection (e.g., respirators) prevents inhalation, while gloves prevent skin contact and subsequent ingestion. These measures effectively block the primary pathways for radioactive substances to enter the body, thus preventing internal contamination.

Question 4: Why is area zoning important in contamination control?

For room aesthetics
To display art
To contain contamination (Correct answer)
To reduce lighting costs

Correct answer: To contain contamination

Area zoning involves dividing a facility into different zones (e.g., clean, buffer, contaminated) based on the potential for radioactive contamination. This practice is crucial for contamination control as it physically contains radioactive materials within designated areas, preventing their spread to uncontaminated spaces. It also facilitates controlled access and systematic decontamination efforts.

Question 5: What should be done with contaminated PPE?

Thrown in trash
Washed with regular laundry
Stored in radioactive waste containers (Correct answer)
Reused immediately

Correct answer: Stored in radioactive waste containers

Contaminated Personal Protective Equipment (PPE) must be treated as radioactive waste to prevent the spread of contamination. After careful removal to avoid further contamination, it should be placed into designated radioactive waste containers. This ensures proper segregation, storage, and eventual disposal according to strict regulatory guidelines for radioactive waste management.

Question 6: What device is used to check for residual contamination?

Metal detector
Thermal camera
Survey meter (Correct answer)
Flashlight

Correct answer: Survey meter

A survey meter is a portable radiation detection instrument specifically designed to measure radiation levels and detect the presence of radioactive contamination on surfaces or objects. It is an essential tool for checking for residual contamination after decontamination efforts. This ensures that contamination levels are reduced to acceptable limits before an area or item is released.

Question 7: What is considered a successful personnel decontamination?

Zero sound
Cleaner clothes
Radiation below release limit (Correct answer)
Normal skin color

Correct answer: Radiation below release limit

Personnel decontamination is considered successful when the measured radiation levels on the individual are reduced to below established regulatory release limits. This ensures that the person no longer poses a contamination risk to themselves or others and can safely leave the controlled area. Achieving these limits confirms the effective removal of radioactive material.

Question 8: Why are foot and hand monitors used?

To massage feet
To cool hands
To detect contamination on extremities (Correct answer)
To take blood pressure

Correct answer: To detect contamination on extremities

Foot and hand monitors are specialized radiation detection instruments typically located at the exits of radiological areas. Their purpose is to quickly and efficiently check personnel for radioactive contamination on their hands and feet before they leave the controlled zone. This helps prevent the inadvertent spread of radioactive materials to uncontaminated areas.

Question 9: What is the first action after a contamination incident?

Ignore and continue
Clean with a towel
Report and contain the area (Correct answer)
Ventilate the room

Correct answer: Report and contain the area

The immediate first action after a contamination incident is to report it to the appropriate supervisor or Radiation Safety Officer and then contain the area to prevent further spread of radioactive material. This ensures that proper response procedures can be initiated promptly, minimizes potential exposure to others, and facilitates effective cleanup and control.

NRRPT Decontamination & Exposure Prevention

What is the primary goal of decontamination?