Health & Safety Flashcards
What should employers provide to employees?
Correct PPE, training, equipment, local rules and washing facilities.
What PPE should employees wear?
Gloves, aprons, dosimeters.
Where are dosimeters worn?
Issued one per person and are worn on lower abdomen, due to radiation targeting quickly diving cells. These include reproductive cells and thyroid.
What are the 2 types of dosimeters?
Film badges and thermoluminest
Explain the process of Thermoluminest dosimeters
Contain radiosensitive lithium fluoride crystals and are usually orange
On exposure to radiation the electrons in the crystals are rearranged, thus storing energy
During the reading process the crystals are heated and give off light in proportion to the amount of energy which they have stored this gives a quantitative reading.
How often should x-ray machines be serviced?
Annually
What is the minimum thickness of lead for a lead apron?
0.25mm
What is the minimum thickness of lead for lead gloves?
0.35mm
What are roles of the radiation supervisior?
To ensure radiography is carried out safely.
To ensure radiology is carried out in accordance with regulations.
To ensure local rules are obeyed
What are the roles of the radiation protection advisior?
To advise on radiation protection.
The demarcation of the controlled area.
Draw up local rules.
Draw up written systems of work.
Who can be a radaiiton protection supervisior?
A vet or a vet nurse
What is the penetravie power of alpha particles?
Not very strong, can be stopped by thin materials such as paper
What is the penetrative power of beta particles?
Can be stopped by thin layers of metal. Dangerous if allowed to enter the body.
What is the penetrative power of gamma particles?
Can be stopped by lead and concrete by absorption
why is PPE used?
to protect against scatter radiation, does not protect from primary beam
