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|  DOE-HDBK-1106-97
Radiological Contamination Control Training
for Laboratory Research
Student's Guide
P-32 betas will travel
o
19 feet in air.
o
0.8 cm in tissue.
o
0.7 cm in plexiglass.
o
0.3 cm in aluminum.
11.
Special considerations:
o
A high local dose can be received if the radioactive material is touched and allowed to
remain in contact with the skin.
o
Do not work over an open container, the eyes can receive a substantial beta dose.
o
Safety glasses can provide eye protection.
o
Contamination is easily detected with G-M thin-window probe.
o
Bremsstrahlung radiation will be a consideration for millicurie quantities.
o
Radwaste containers may need to be shielded with plexiglass.
Typical dose rates from 0.1 mCi (4 x 106 Bq):
o
3 mrad/hr at 1 cm.
o
0.03 mrad/hr at 10 cm.
o
0.002 mrad/hr at 40 cm.
A-8
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