Quantcast Average annual dose - hdbk-1130-98_ch10212

 

Click here to make tpub.com your Home Page

Page Title: Average annual dose
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home

   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Back
Effects of Radiation on Cells - hdbk-1130-98_ch10211
Up
Radiological Worker Training - index
Next
Acute and Chronic Radiation Dose - hdbk-1130-98_ch10213


DOE-HDBK-1130-98
Several things can happen when a cell is exposed to ionizing radiation. The following
are possible effects of radiation on cells.
a. There is no damage
b. Cells repair the damage and operate normally
1) The body of most cells is made up primarily of water. When ionizing radiation
hits a cell, it is most likely to interact with the water in the cell. One of the
byproducts of radiation-induced ionization of water is hydrogen peroxide.
Hydrogen peroxide can damage cell atomic structures.
2) Ionizing radiation can also hit the nucleus of the cell. The nucleus contains the
vital parts of the cell, such as chromosomes. The chromosomes determine cell
function. When chromosomes duplicate themselves, the chromosomes transfer
their information to new cells. Radiation may cause a change in the
chromosome that does not affect the cell.
3) Damage to chromosomes and other cell structures can be repaired. In fact,
our bodies repair a very large number of chromosome breaks every day
(References 7 and 10).
3. Average annual dose
The average annual total effective dose equivalent to the general population from
naturally occurring and manmade sources is about 360 mrem.
c. Cells are damaged and operate abnormally
1) Cell damage may not be repaired or may be incompletely repaired. In that
case, the cell may not be able to function properly.
2) It is possible that a chromosome in the cell nucleus could be damaged but not
be repaired correctly. If the cell continues to reproduce, this is called a
mutation and may result in cancer.
d. Cells die as a result of the damage
At any given moment, thousands of our cells die and are replaced by normal
functioning cells. However, the radiation damage to a cell may be so extensive that
the cell dies prematurely.
19


Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc.