16 - Shielding Design and Calculations

16 - Shielding Design and Calculations - Lecture # 15 (Ch....

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1 Shielding Design and Calculations Tarun K. Podder, PhD, DABR Department of Radiation Oncology Brody School of Medicine Leo Jenkins Cancer Center East Carolina University March 03, 2011 Lecture # 15 (Ch. 16)
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2 Goals of Radiation Shielding Design below the regulatory limits of 10 CFR Part 20 below any special state regulatory requirements within ALARA limits established at the facility To ensure that all exposure levels to the public and occupational personnel are maintained-
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3 Goals of Radiation Shielding Design Protective barriers are designed to ensure that the dose equivalent received by any individual does not exceed the applicable maximum permissible value. Individuals: • Occupational (radiation workers) • General public
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4 Goals of Radiation Shielding Design Controlled Areas: Dose equivalent = 50 mSv/yr (5 rem) about 1 mSv/week (dose ~1 mGy/wk) Uncontrolled Areas (infrequent exps.) : Dose equivalent = 5 mSv/yr (0.5 rem) about 0.1 mSv/wk (dose ~0.1 mGy/wk) NCRP – National Council for Radiation Protection and Measurements For x-ray and γ -ray Q ~1, hence H m ~ D (Sv ~ Gy)
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16 - Shielding Design and Calculations - Lecture # 15 (Ch....

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