Nuclear Engineering Principles 9

What is the difference between radiation exposure and contamination?

• Contamination is radioactive material where it is unwanted

• Radiation exposure does not cause harm

• There is no difference

• Contamination is caused by radiation exposure

Which type of radiation is the greatest internal hazard?

• Beta particles
• Gamma rays
• Alpha particles
• Neutrons

Which part of the body is targeted by I-131?

• Brain

• Blood

• Bone

• Thyroid

Which organ is at the greatest risk from Kr-85?

• Brain

• Heart

• Lungs

• Kidneys

What is used to detect radiation exposure to the body?

• Scintillation counter

• Semiconductor detector

• Gaseous ionisation detector

• Dosimeter

Which type of dosimeter should be used for real time dose information?

• Electronic

• TLD

• Film badge

• Quartz fibre dosimeter

How can radiation exposure be minimised?

• Decrease the time spent with the source

• Increase the distance from the source

• Use shielding

• Use a source with lower activity

How far should a source be kept from the body?

• 10cm

• 20cm

• 30cm

• 50cm

How should you handle cup sources?

• With your fingertips

• On the palm of your hands

• Using long forceps

• With gloves

Which of these should you do when handling radioactive sources?

• Wash your hands afterwards

• Check for any damage before using

• Do not eat/drink whilst handling

• Handle sources carefully