Radiation Safety Exam
National Council on Radiation Protection and Measurements - CORRECT ANSWER - NCRP
DOT, OSHA, EPA, NRC, ICRP, NCRP - CORRECT ANSWER -Agencies responsible for radiation safety and control
- rems per year - CORRECT ANSWER -Occupational Dose Limit for effective dose
equivalent
15 rems per year - CORRECT ANSWER -Occupational Dose Limit for Lens of the eyes
50 rems per year - CORRECT ANSWER -Occupational Dose limit for any organ or tissue
.5 rem per gestation period - CORRECT ANSWER -Occupational dose limit for embryo/fetus of a declared pregnancy
.1 rem per year - CORRECT ANSWER -General Public dose limit for effective dose equivalent
NCRP recommends that the EDE due to work-related exposure not exceed the worker's age in years - CORRECT ANSWER -Additional guidelines of NCRP
As low as reasonably achievable - CORRECT ANSWER -ALARA acronym
Maintain radiation doses to personnel in medical institutions to 10% or less of the federal limits of occupational exposure - CORRECT ANSWER -ALARA implementation
Personnel Dosimeters - CORRECT ANSWER -devices worn by individuals exposed to ionizing radiation to evaluate and document their cumulative external radiation doses
Body Dosimeters - CORRECT ANSWER -utilize "optically stimulated luminescence (OSL)". Called "Luxel" dosimeters. Very sensitive to ionizing radiation.
Ring Dosimeters - CORRECT ANSWER -are "thermoluminescent dosimeters (TLDs)".Used to measure doses to the hands of certain personnel. Should be worn like a conventional ring.
Shallow dose, deep dose, lens dose - CORRECT ANSWER -three doses the luxel body dosimeter can report
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Shallow dose - CORRECT ANSWER -dose equivalent computed for a tissue depth of 0.007 cm (skin dose)
Deep dose - CORRECT ANSWER -dose equivalent computed for a tissue depth of 1.0 cm
Lens dose - CORRECT ANSWER -dose equivalent computed for a tissue depth of .3 cm (thickness of the lens of each eye)
Geiger-Muller instruments, Ionization Chamber survey instruments, Scintillation survey instruments - CORRECT ANSWER -Three types of portable survey instruments
Geiger Muller Instruments - CORRECT ANSWER -utilize a gas detector that is capable of detecting beta, gamma, and x-radiation. Uses mR/hr for gamma and x, but uses counts per minute (cpm) for beta.
Ionization Chamber Survey Instruments - CORRECT ANSWER -Measure radiation exposure in roentgens. CAn be used at higher exposure rate levels. Considerably more expensive than Geiger
Scintillation Survey Instruments - CORRECT ANSWER -utilize a solid sodium iodide crystal coupled to a sensitive photomultiplier tube as a detector. Excellent at locating multiple sources or identifying areas of contamination
Recognizing sources of potential external exposure and controlling internal contamination - CORRECT ANSWER -Good radiation hygiene
Terrestrial radiation - CORRECT ANSWER -Natural background radiation that results from the presence of naturally occurring radioactivity in the soil and earth
Cosmic radiation - CORRECT ANSWER -Natural background radiation that results from the interaction of particles originating in outer space with the earth's atmosphere
Internal Radioactivity - CORRECT ANSWER -Natural background radiation due to naturally occurring radionuclides that have been deposited in the human body via either ingestion or inhalation
300 millirem - CORRECT ANSWER -Average annual effective dose equivalent in the US (200 millirem attributed to radon gas)
Medical radiation - CORRECT ANSWER -average per capita effective radiation dose equivalent is approximately 53 millirem per year
Department of Transport - CORRECT ANSWER -DOT
Occupational safety and Health Administration - CORRECT ANSWER -OSHA
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