NCRP Report #147 - Radiation Shielding for Medical Instalations

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Background• The purpose of radiation shielding is to protectmembers of the general public and workers from theharmful effects of ionizing radiation and theinstitution from the harmful effects ec of an upsetregulator• Regulatory dose limits define permissible levels• In the USA, regulations come from– National government <strong>for</strong> nuclear materials– State t & local l government <strong>for</strong> x-ray uses• Best practices to achieve these regulatory goals referto the recommendations of independent scientificbodies8
Background…And this place is backwards… We speak“feet” and “rads & rems, and effectivedose equivalent!”9
Page 1 and 2: RSMI 2009Session II - General Conce
Page 3 and 4: Preliminaries• “Thank You” to
Page 5 and 6: Madeline Jean Simpkin, born July15,
Page 7: I’m No Philosopher• I’m here
Page 11 and 12: NCRP Report #147• NCRP Report #14
Page 13 and 14: NCRP-491976Design Goal, PControlled
Page 15 and 16: P=0.1 1 mGy/y for Uncontrolled area
Page 17 and 18: NCRP Statement 10 (2004)• In Stat
Page 19 and 20: NCRP-147 Recommended TOffices, labs
Page 21 and 22: X-ray Beam Transmission•For a giv
Page 23 and 24: Archer Equation for Transmission Cu
Page 25 and 26: Archer Equation for Transmission Cu
Page 27 and 28: Workload, W• W is a measure of th
Page 29 and 30: Workload, W• To determine W used
Page 31 and 32: Workload Survey• Found total W to
Page 33 and 34: Workload Distribution, W(kVp)• Ge
Page 35 and 36: General Radiographic RoomWorkload D
Page 37 and 38: NCRP-147 Models for DiagnosticX-Ray
Page 39 and 40: The Three Models In NCRP 147• cf
Page 41 and 42: Result: CT Scanner in a Shielding C
Page 43 and 44: Surveys of X-ray Shielding• After
Page 45 and 46: NCRP Report #147 Conclusions I• D
Page 47: NCRP Report #147 Conclusions III•

NCRP Report #147 - Radiation Shielding for Medical Instalations

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