Transcript Slide 1

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Radiation Protection
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Objectives and standards
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Occupational (onsite) vs. Non-occupational (offsite)
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Benefits and risks
Number of exposed people
ALARA principle
Radiation Protection and Safety
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Radiation Protection
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7/20/2015
National Council on Radiation Protection and
Measurements (NCRP)
International Commission on Radiological
Protection (ICRP)
Radiation Protection and Safety
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Radiation Protection
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Equivalent Dose: HT,R = wRDT,R
Radiation Protection and Safety
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Radiation Protection
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Effective Dose: E = Σ wTHT
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Risk estimates
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Dose constraints
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Radiation Protection and Safety
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Radiation Protection
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Intake limits
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Transfer models
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Radiation Protection and Safety
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Radiation Protection
Organ and tissue
activity over time
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Short term and
long term doses
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Radiation Protection and Safety
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Radiation Protection
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Time, distance and shielding
Buildup factor (B) used for gamma rays: I = BIoe-μx
Radiation Protection and Safety
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Radiation Protection
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Calculating the shielding thickness (x)
Narrow beam of gamma rays (B = 1)
Radiation Protection and Safety
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Radiation Protection
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X ray machines
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Lead lining
Controlled and
uncontrolled areas
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Dose/year
Radiation Protection and Safety
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Radiation Protection
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Experimental data
Application of Q in
shielding design
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0.114Pd2
Q
WUT
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Radiation Protection and Safety
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Radiation Protection
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Beta & Bremmstrahlung
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Neutrons
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Radiation Protection and Safety
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