Quiz 7.3 - Managing radiation risk

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This quiz has 6 questions. Click Submit at the end to mark it. No personal data is collected.

Use this image for questions 1 and 2.

It shows workers cutting open a container that is contaminated with radioactive material.

The dose they would receive from the radiation would not be too hazardous for short periods.

1. What's the main reason for the workers wearing protective clothing? *

1 point

To stop them being irradiated by the radiation

To stop their skin being contaminated with radioactive dust

To catch the radiation and stop it spreading

2. The clothing can be washed afterwards. What is the reason for this? *

1 point

To wash off any radioactive dust

To wash off the radiation

To turn alpha particles into helium gas

3. This mock-up shows how pieces of radioactive scrap metal can be encased in cement, before disposal deep in the bedrock.

What is the main purpose of the cement once the canister is sealed underground.

1 point

To stop radiation leaking out

To slow how long it takes for water to get to the radioactive scrap metal

To reflect gamma radiation back into the cannister

4. What precautions are in place to stop these doctors receiving a significant radiation dose from this gamma radiation therapy machine over time? Choose two. *

1 point

Shielding around the machine, apart from where the gamma is designed to be shone onto the patient

Leaving the treatment room while the machine is working

Washing the white coats after each patient

Required

5. Here is a technician working with highly radioactive materials in a 'hot cell'. What is the most important precaution that reduces the dose the technician receives. *

1 point

Shielding - the thick lead glass blocks radiation

Distance - the technician is nearly a metre away from the radioactive materials

Time - the technician is only allowed to operate the hot room for two minutes per day

6. A doctor is injecting a radioactive tracer into a patient.

Why is the container covered with lead?

1 point

Shielding - to reduce the amount of gamma the doctor and other medical staff are exposed to

Strength - to minimise the chance of breakage if the container is accidentally dropped

Chemistry - to stop the medical tracer reacting witht the container

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