From: constant@gn.ecn.purdue.edu (Tino)
Subject: Re: "SECRET FALLOUT, Low-Level Radiation from Hiroshima to TMI" [1/15]
Keywords: RADIATION!!! RUN!! DUCK AND COVER!!
Organization: Purdue University Engineering Computer Network
Date: Tue, 5 Jan 93 02:48:24 GMT

Dave, since you are about to post several more megabytes of crap, without
the acknowledgement of "just where radiation comes from", I'll do it for 
you. This will probably be reposted every time you fill up the newsgroup
with more of your tripe.


Average annual individual doses in mrems from natural and man-made         
radiation sources:

Source                   Exposed Group    Body Portion Exposed    Indiv. Dose
------------------------------------------------------------------------------
Natural Radiation:
  External sources:
    Cosmic Rays          Total population      whole body              28
    Terrestial gammas    Total population      whole body              26
    Radon and daughters  Total population      bronchial epithelium  ~150
  Internal sources:
    K-40                 Total population      gonads                  19
                                               bone marrow             15
    Heavy elements       Total population      gonads                   8
                                               bone marrow              8.5
    C-14                 Total population      gonads                   0.7
                                               bone marrow              0.7
    Rb-87                Total population      gonads                   0.3
                                               bone marrow              0.6

Man-made Radiation:
  Medical x-rays         Adult patients        bone marrow            103
                         Medical personnel     whole body             300-350
  Dental x-rays          Adult patients        bone marrow              3
                         Dental personnel      whole body              50-125
  Radiopharmaceuticals   Patients              bone marrow            300
                         Medical personnel     whole body             260-350
  Weapons fallout        Total population      whole body               4
  Nuclear power cycle    Population<10 miles   whole body               1
                         Workers               whole body             200-400
  Building materials    Brick,masonry dwellers whole body               7
  Air Travel             Passengers            whole body               3
                         Crew                  whole body             160
  Television             Viewers               gonads                   0.2-1.5
  Tobacco                Smokers (1.5 packs/d) bronchial epithelium  8000

Taken from: National Academy of Sciences, "The Effects on Populations of
Exposure to Low Levels of Ionizing Radiation"; IAEA, "Nuclear Power, The
Environment, and Man"; National Council on Radiation Protection and 
Measurements, "Natural Background Radiation in the United States"; U.S. EPA,
"Radiological Quality of the Environment of the United States"

Tino

-- 
     "Here are the young men, the weight on their shoulders..." - J.D.
----------------------------------------------------------------------------
             Purdue University School of Nuclear Engineering
----------------------------------------------------------------------------