3 H Module Objectives To understand the physical nature of 3 H. To understand that 3 H is both an internal and external radiation hazard. To understand the need to utilize shielding.
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Standard industry practice 100 cm2
12” to 14”
4” x 4”
Prepare blank exactly as samples without activity
Dark adapt samples for a minimum of 30 minutes:
(Light interacts with sample usually causing the first sample to appear hot)
Chemical interaction can cause spurious pulses (chemoluminescense) in the Tritium Window (first 3 or 4 channels)
How do I know if I have contamination?
Is my sample greater than my background upper control limit? If yes, then I am 99% confident that I have levels above background.
What is the Annual limit of Intake (the activity that will yield a 5 Rem dose over the period of 1 year)?
A. 80 mCi
B. 800 mCi
C. 8.0 mCi
D. 80 mCi
The Annual limit of intake via ingestion or inhalation is 80 mCi. (this means that a total burden in the body from the stomach or lungs alone of 80 mCi will give a 5 Rem dose).
Which Protective equipment is NOT required?
A Lab Coat
B Properly selected glove
C Protective Eyewear
Due to the low energy of the 3H beta particles, shielding is NOT required
The Following is prohibited in isotope laboratories
D. All of the above
This should be obvious!!!!!
What instrument do you employ to when checking for tritium contamination ?
A. Liquid Scintillation Counter
B. Geiger Counter
C. Gamma Counter
The Geiger Counter and gamma counter will not detect the low energy tritium betas or any bremstrahlung radiation.
Please sign and date the training form and click on the letter that indicates the first letter of your last name (ie. Farina is A)
A. A - F
B. G - L
C. M - R
D. S - Z
If you have any questions while reading the Radiation Safety Procedures
Please Feel Free to Contact:
The Radiation Safety Office
University Research Support and Administration
Office of Research Integrity
Georgia State University
Atlanta, Georgia 30303
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