Topic 38

Question 1

Describe stochastic effects of radiation

Answer 1

Effects for which only the probability of occurence of damage depends on dose without threshold.

Considered to be heritable and carcinogenic

Question 2

Describe deterministic effects.

Answer 2

Effects that apear after a latent period

A threshold dose is required to be reached to observe detrimental effects.

Above the threshold, severity of the effect depends on the dose.

Question 3

Draw the dose-effect curves

Answer 3

Question 4

Give the basic principles of radiation protection

Answer 4

Justification

Optimisation

Dose Limits

Question 5

What is justification, as means of radiation protection?

Answer 5

To do more good than harm

Question 6

What is Optimisation, as means of radiation protection?

Answer 6

ALARA

As Low As Reasonably Achievable

Making every effort to reduce risk to exposure

Question 7

What are Dose Limits, as means of radiation protection?

Answer 7

Limits of dose not to be exceeded in industry

Question 8

Draw the gas filled radiation detector

Answer 8

Question 9

How do ionisation chambers, proportional counters and GM tubes compare?

Answer 9

The same design only with different voltage ranges

Question 10

Describe the scintillation detector

Answer 10

Radiation releases and electron which multiplies in a photomultiplier chamber

These are then measured.