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Modes of Exposure and Biological Behavior of Tritium - doe-hdbk-1105-2002_reaffirm20070032
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Radiological Training for Tritium Facilities - index
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Absorption - doe-hdbk-1105-2002_reaffirm20070034


DOE-HDBK-1105-2002
Radiological Training for Tritium Facilities
Instructor's Guide
Notes
Show OT 32
1.
Inhalation
An extremely low
a.  Tritium gas: is only slightly
percent (in the order
incorporated into the body when inhaled. Most
of 0.005%) of tritium
tritium gas inhaled is subsequently exhaled.
gas inhaled is
There are other chemical and physical processes
converted to tritiated
to convert tritium gas to tritiated water.
water prior to being
exhaled.
b.  Tritiated water vapor: Nearly 100%
of tritiated water vapor inhaled is incorporated
into body fluids/tissues.
Tritiated water vapor
is more hazardous
c.  Hazard: Exposure to tritiated water
due to its ability to be
is approximately 25,000 times more hazardous
almost 100%
than exposure to elemental tritium gas.
assimilated,
increasing the dose
d.  Special Tritium Compounds: consist
received by the
of organically bound tritium and tritium
individual.
particulate aerosols.
Exposure to organically bound tritium can be up
Refer to RCTP 2001-
to approximately 13 times more hazardous than
02 and Health
exposure to HTO.
Physics Journal
September 2001.
Exposure to tritium particulate aerosols can
deliver up to approximately 20 times more dose
to the whole body than exposure to HTO. The
dose to the lungs from tritium particulate aerosols
could be 2 orders of magnitude higher than from
HTO.
2.
Ingestion
Ingestion may occur by eating, drinking, chewing
tobacco, and applying makeup where tritium
contamination is present. Always wash hands
thoroughly when leaving areas where there is a
potential for contamination, and never eat, drink
etc. where tritium contamination may be present.
17


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