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Radiation Safety Exam NMTCB Questions and Answers 100% Correct
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Radiation Safety Exam NMTCB
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Radiation Safety Exam NMTCBaccelerator produced radionuclides - answerI-123
Ga-67
Tl-201
In-111
Reactor produced radionuclides - answerMo-99/Tc-99m
I-131
I-125
Xe-133
Cr-51
Sr-89
Sm-153
P-32
Total radiation dose based on length of exposure - answer Total dose=(dose rate)(time)
Inverse Square Law - answer(Intensity 1)(Distance 1)^2=(Intensity 2)(Distance 2)^2
Half-value layer HVL - answer Thickness of material required to reduce radiation
intensity to half its original value.
Equation for exposure after HVL added - answer Intensity=intensity(original)e^-(0.693)
(x/HVL)
x = the thickness of the shielding material
NRC Regs are based on - answer Risk-informed, performance-based approach in
which the NRC will not, for the most part, specify exactly what methods must be used or
how frequently radiation safety procedures must be performed. The licensee must
develop policies and procedures that ensure NRC requirements are met.
Whole-body TEDE - answer5rem or 50mSv per year
Lens of eye - answer15rem or 150mSv per year
Organ Tissue dose - answer50rem or 500mSv per year
General public dose - answer0.1rem or 1mSv per year
Embryo/fetal dose - answer0.5rem or 5mSv for entire pregnancy
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