Question 1
What is the safest way to store a radioactive source?
A
in a lead-lined box in a metal cabinet
B
on a shelf away from other radioactive materials
C
in a glass bottle containing oil
D
in a fume cupboard
Covered syllabus points
Question 2
[Maximum number: 2]
Radioactive isotopes that emit ionising radiation are used in hospitals.
State and explain two safety precautions necessary for the use of these isotopes in medical procedures.
safety procedure 1
explanation
safety procedure 2
explanation
any two from:
- reduce exposure time AND low(er) amount of radiation absorbed
- increase distance between source and hospital staff AND lower amount of radiation reaches staff
- use of shielding (e.g. walls, lead etc.) AND radiation absorbed by shielding / cannot penetrate through shielding
- use isotopes with short half-life AND lower amount of radiation emitted from patient / radiation (above background) emitted for a shorter period of time
- use of film badge / dosimeter AND manage individuals exposure owtte
- restrict pregnant staff / patient in hospital AND radiation may harm foetus owtte
Question 3
[Maximum number: 2]
State two safety precautions taken when moving, using or storing radioactive sources in a laboratory.
1
2
any two from:
- limit time of exposure
- store sources in lead boxes
- keep distance from sources
- avoid contact OR use tongs OR wear gloves
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