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Page Title:
External and Internal Radiation Dose Reduction |
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|  DOE-HDBK-1130-98
Reducing the amount of radioactive material (source reduction)
a.
Methods for minimizing time
Reducing the time spent in a field of radiation will lower the dose received by the
workers.
1)
Plan and discuss the task thoroughly prior to entering the area. Use only the
number of workers actually required to do the job.
2)
Have all necessary tools present before entering the area.
3)
Use mock-ups and practice runs that duplicate work conditions.
4)
Take the most direct route to the job site if possible and practical.
5)
Never loiter in an area controlled for radiological purposes.
6)
Work efficiently and swiftly.
7)
Do the job right the first time.
8)
Perform as much work outside the area as possible. When practical, remove
parts or components to areas with lower dose rates to perform work.
9)
Do not exceed stay times. In some cases, the Radiological Control Organization
may limit the amount of time a worker may stay in an area due to various
reasons. This is known as "stay time." If you have been assigned a stay time,
do not exceed this time.
10)
(Insert facility-specific information.)
b. Methods for maximizing distance from sources of radiation
The worker should stay as far away as possible from the source of radiation.
1)
Stay as far away from radiation sources as practical given the task assignment.
For point sources (such as valves and hot spots), the dose rate follows a principle
called the inverse square law. This law states that if you double the distance, the
dose rate falls to 1/4 of the original dose rate. If you triple the distance, the dose
rate falls to 1/9 of the original dose rate.
2)
Be familiar with radiological conditions in the area.
3)
During work delays, move to lower dose rate areas.
4)
Use remote handling devices when possible.
5)
(Insert facility-specific information.)
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