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Interference from Radon - doe-hdbk-1113-98_reaffirm_2005_040091
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Radiological Safety Trainign for Uranium Facilities
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Special Radiological Surveys cont'd


DOE-HDBK-1113-98
Module 104 Internal Dose Control
Lesson Plan
Instructor's Notes
Radon is a radioactive gas that occurs
naturally in the environment. It decays
by alpha emission in the first of a series
of very short half-life radionuclides
that decay by alpha or beta-gamma
emission.
There is a simple, inexpensive
alternative to determine if the
contamination is due to radon. The
effective half-life for radon radioactive
decay products is about 30 minutes,
compared with the millions of years it
takes for uranium to decay. The simple
way to determine if contamination is
due to radon is to wait and see if it goes
away. The sample is recounted after the
radon has an opportunity to decay to
lower levels. The count rates are
compared, and if the count rates are
significantly different, radon is the
most likely reason for the higher initial  Highlight the radioactive
contamination limits used
count rate.
for
release of materials and
h.
Special Radiological Surveys and
equipment at your facility.
Techniques for Release of Materials with
the Potential for Uranium Contamination
56


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