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Each person who
dispersible radioactive materials is responsible for:
properties of the radioactive
materials to be used, e.g. the half-life of the nuclide(s), the type(s)
of radiation emitted, the annual limit on intake (ALI) and the type and
quantity of the appropriate regional
or procedures provided
by the responsible user and the RSO, or provided in the Radiation
clothing, equipment and
work area frequently during procedures in which more than 1 ALI is
and surveying of hands and personal clothing before leaving the
obtaining a thyroid
count or other bioassay measurements, at intervals specified by the RSO.
all radiation surveys
and screening bioassays promptly, completely and accurately.
containing more than 10 times the Reference Quantity values given in 10CFR20, Appendix
C and RPR10
must be labeled with a "CAUTION RADIOACTIVE MATERIALS" label. For rooms
containing X-ray machines “CAUTION X-RAY EQUIPMENT” label should be used.
If any dose
rate exceeds 2 mrem in any one hour at 30 cm (1ft.) from an accessible source or surface,
the room shall be posted as a "RESTRICTED AREA" to prevent entry of
unauthorized individuals. If any dose rate exceeds 5 mrem in any one hour at 30 cm
(1ft.) from an accessible source or a surface, the room must be labeled with a
"CAUTION RADIATION AREA" sign.
available from the RSO, must be posted in a location clearly visible to
anyone entering the laboratory.
All containers of radioactive materials should be labeled with the "CAUTION, RADIOACTIVE MATERIAL" or "DANGER, RADIOACTIVE
shall ensure that
instruments used for determining exposure rates or for direct detection
of contamination are calibrated biannually and capable of responding
to the types of radiation anticipated. The user must know the detection
efficiency (e.g. % efficiency for the radionuclides being used in the
laboratory, cpm/dpm) for each contamination survey instrument and
record it with all survey results.
recently provided laminated lantern mantle check sources to verify that
your survey instrument is in proper working order. Contact
you do not know how to use these.
of work, good
techniques and thorough monitoring are all necessary to minimize
Adequate time, distance, and shielding (the ALARA concept) from sources
are also important factors in reducing exposure.
intake of radioactive
radioactivity must be prevented
by avoiding mouth contact with any items
handled in a radioactive material
laboratory (pipettes, pencils, etc.), by prohibiting eating, drinking
smoking in radionuclide handling areas and by careful attention to