Click here to make tpub.com your Home Page

Page Title: Iodine-125 (I-125)
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
   
   

 



DOE-HDBK-1106-97
Radiological Contamination Control Training
for Laboratory Research
Student's Guide
IODINE-125 (I-125)
Iodine-125 is a gamma and X-ray emitter. I-125 contamination may be detected by a thin-window G-M
probe or with liquid scintillation counting.
1.
Maximum energy: 0.035 MeV gamma (6.5%), 0.027 MeV x-ray (112.5%) and 0.031 MeV
X-ray (25.4%).
IAEA toxicity classification: Medium-high.
2.
Physical half-life: 60 days.
3.
Effective half-life (Teff): 42 days.
4.
Critical organ: Thyroid gland.
5.
Personnel monitoring: Internal uptakes evaluated by thyroid scan.
6.
ALI:
7.
0.06 mCi (2 x 106 Bq) by inhalation, daily clearance.
o
0.04 mCi (1 x 106 Bq) by ingestion.
o
Shielding: 0.25 mm of lead is the first half-value layer.
8.
9.
Other considerations for iodine compounds:
o
Volatilization of iodine (NaI) is the most significant hazard.
o
Simply opening a vial of sodium iodide at high-radioactive concentrations can cause
minute droplets to become airborne.
o
Solutions containing iodide ions should not be made acidic nor stored frozen; both lead
to formation of volatile elemental iodine.
o
Some iodide compounds can penetrate surgical rubber gloves - wear two pairs or
polyethylene gloves over rubber.
o
Can be easily absorbed through the skin.
A-19


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

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business