Radiation Dose Distribution Precentages Background Etc

Question 1

Radiation dose distribution

Answer 1

3% from dental 
30% dental examinations 
1 % all uk deaths caused by radiation
4% cancer deaths in uk caused by radiation
8588 people a year killed by radiation

Question 2

Where does the radiation come from

Answer 2

Background radiation
Cosmic radiation
Rocks- slate and granite
Radon gas 50% of uk radiation deaths from this
Food and drink 14% total radiation dose from this

Ionising
Manmade- nuclear power stations and accidents
Atomic bombs
Smoke alarms and glow in the dark watches
Old tv’s
Medical and dental radiation

Non ionising
Mobile phones
Wifi
Cordless phones

Question 3

Uk doses

Answer 3

83% background
17% Manmade made - medical and dental 90% and other 10%
91% medical officially 97% and 9 % officially 3% dental
Number of examinations
70% medical
30% dental
50% of all doses could and should be cut

Question 4

Equivalent dose

Answer 4

How dangerous was the exposure measured in Sv

Question 5

Absorbed dose

Answer 5

How much energy has been transferred to the person
Measured in Grays Gy
Average absorbed dose bw 1-1.5mGy/cm2
Opg 10-20mGy NOT per cm2