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DOE-HDBK-1106-97
Radiological Contamination Control Training
for Laboratory Research
Instructor's Guide
Instructor's Notes
8.
Critical organ:
o
Liver and spleen for inhalation.
o
Lower large intestine for ingestion.
9.
Personnel monitoring: Dosimeter, finger rings -
fecal analysis may be used to determine uptake for
weeks or months after handling. Urinalysis is
recommended from 4-24 hours after handling.
10.
ALI:
0.3 mCi (1 x 107 Bq) by inhalation.
o
0.8 mCi (3 x 107 Bq) by ingestion.
o
Shielding: 0.38 inch (9.7 mm) of lead is the half-
11.
value layer.
12.
Special considerations:
o
Near an unshielded Fe-59 source, dose rates
from beta radiation can be much higher than
dose rates due to gamma radiation.
o
Avoid direct eye exposure.
o
Avoid skin exposure.
A-24


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