2. Unit of measurement of radiation
It introduces the unit of doses of radiation in which the influence
level to the human body is shown.
Unit name: rem(roentgen equivalent in man and
mammal)
Calculation: The coefficient of each kind of the
radiation provided in doses of radiation (rad) that the
human body absorbed is multiplied and calculated.
Comparison with other units: 1rad = 0.01Sv=1rem
3. Influence on human body by
radiation
Rem Symptom
less than 25 Symptom almost none
50 A white blood corpuscle decrease
100 Nausea, vomiting, General malaise, A decrease
150 that paves lymphocyte
300 It is a radiation sickness in the person of 50%.
400 The person of 5% dies (bone-marrow damage).
600 The person of 50% every 30 days dies.
700 The person of 90% every 14 days dies (central
nervous system damage). The person of 100%
dies.
4. Nuclear bomb about
Hiroshima and Nagasaki
Hiroshima Nagasaki
The dead About 140000 people About 149000 people
Radiation(1c㎡) First neutron: 1.2 Thermal neutron: 3-4
trillion trillion
Thermal neutron: 9
trillion
Influence on human Burn injury Burn injury
body Radiation injury Radiation injury
Keloid Keloid
Exposure in the oven Exposure in the oven
Mental influence Mental influence
5. Three Mile Island
Discharged radioactive substance⇩
Rare gas(helium, argon, and xenon, etc.): 92.5PBq
Iodine: 555GBq
Exposure of resident in surrounding: 0.01 - 1mSv
Influence on human body: It is almost the same as the chest
radiograph.
Influence on plants and animals: The productivity of the
horse and the cow has decreased remarkably. The deformity of
the flora and fauna of 100 or more was discovered.
6. Chernobyl
Discharged radioactive substance: 14xesBq
Exposure of resident in surrounding: 31mSv
Recovery efforts person: 117mSv
Resident who lives in contaminated area(Belarus, Russia,
Ukraine): 9mSv
Assumed damage:
55,000 people have already died.
The occurrence of the thyroid carcinoma by the child in
Belarus, Ukraine, and Russia has increased.
7. Medical dare
The radioactivity cannot be removed from the inside of the body
by a modern medical treatment.
When the radiation might be bathed in if going out, it is
necessary to throw away what worn at that time and acquired
what or to flush it washing.
8. Conclusion
● The nuclear power plant and the atomic bomb have a
difference. So, The nuclear power plant doesn't have the
bloodshed ability like the atomic bomb.
● People have experienced a lot of nuclear accidents.
● The radiation cannot be removed from the inside of the
body.
