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DOE-HDBK-1109-97
Radiological Safety Training for Radiation-Producing (X-Ray) Devices
Student's Guide
but the 0B500 mR range, marked in increments of 20 mR, is often used. The dose is read
by observing the position of a hairline that moves upscale in proportion to dose. Pocket
dosimeters are supplemental and used primarily as radiological worker management tools.
They are not typically used for determining the dose of record required by 10 CFR 835.
iv. Alarming Dosimeters.
In higher dose-rate areas, an alarming dosimeter may be used to provide an audible
warning of radiation. This contributes to keeping doses ALARA by increasing a worker's
awareness of the radiation.
Specific applications may require special considerations. For example, low-energy X-rays
will not penetrate the walls of some dosimeters. Flash X-ray devices produce a very short
pulse that is not correctly measured by most dose-rate instruments.
(Insert facility-specific information as appropriate.)
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