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Radiation Safety Trng in .doc
Radiation Safety Trng in .pdf
Radiographic Sci Trng in .doc
Radiographic Sci Trng in .pdf
planning of work, good handling techniques and thorough monitoring are all
necessary to minimize the external exposure. Adequate shielding and distance
from sources are also important factors in reducing exposure.
Workers can apply three principles to protect themselves
from ionizing radiation exposure:
Obviously, the less time a person spends in a
radiation field, the less exposure he/she will receive. Keep in mind that exposures to radiation
are additive in their effect.
minimize time of exposure to a radiation field
- Preplan the task thoroughly prior to
entering the area. Use only the number
of people required for the job.
- Have all the
necessary tools prior to entering the area.
efficiently but swiftly.
- Do the job
right the first time
- Perform as
much work outside the area as possible.
The greater the distance you are from a source the smaller
the exposure. Staying away from a
radiation source, even a few feet, will greatly reduce worker exposure.
- Be familiar with radiological conditions in the area.
- During work delays, move to lower dose rate areas.
- DO NOT hold patients.
Shielding places protective materials between the worker and
the source; for example, walls, barriers, or protective clothing (i.e., lead aprons).
Proper uses of shielding
- Take advantage
of permanent shielding.
temporary shielding as necessary.
are monitored by using individual monitoring devices. These devices are required to be used if the
worker is likely to receive an external exposure that will exceed 10 percent of
your allowed annual dose. The most
commonly used monitoring devices are:
Dosimeter (TLD)- (modern technology often uses Optically Stimulated Luminescence (OSL) Dosimeters)
The whole body badge is worn to measure the exposure to the whole
body (i.e., between the neck and the waist).
- Direct Reading
The DRDs are
worn adjacent to the whole body badge.
If lead apron is used, the whole body badge needs to be worn on the collar outside of the lead
Dosimetry devices issued from ISU's Radiation Safety Office
are used to monitor the exposure that you receive while performing work at ISU
only, and cannot be used at any other facility.
It is important that they are returned to their proper storage location
when they are not in use. This ensures
that the badges are only recording your exposure from work performed at ISU,
and also minimizes the chance of the badges being misplaced or lost.
If you are personally receiving radiation exposure for
diagnostic or therapeutic purposes, DO
NOT wear your dosimeter. Contact the RSO to discuss this situation. Be
certain to contact RSO/TSO if you are exposed to radiation at other
The dosimeters will be picked up and replaced every three
months for processing. Personnel that
fail to return dosimeters, or return them to their proper storage locations,
will be restricted from continued radiological work at ISU.
Temporary dosimeters will be issued on a case by case basis
only. The professor in charge of the lab
or facility will be responsible for the radiological actions of the potentially
exposed individual. Temporary badges will not be issued as a vehicle to
circumvent training requirements.
The responsible user shall ensure
that instruments used
for determining exposure rates are calibrated biannually and capable of responding appropriately
to the types of radiation anticipated.
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.
|Records and Reports
records of surveys, measurements and individual monitoring are maintained at
the TSO. Records of the doses to individuals are reported, at least annually to
the workers in a format required by the NRC (10 CFR 20.2106). If a dose received by a worker
exceeds any of the annual dose limits, any occupational exposure will be
prohibited for the overexposed individual for the rest of that year (Reg. Guide
request of a former ISU worker, the dose report for the period of time that the
individual was engaged in ISU activities will be furnished to the worker (10
workers are concerned about safety issues in their workplace, they may request that
the NRC conduct safety inspections.