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Radiation Safety – Health Physics

Radiation Safety – Health Physics

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Radiation Safety – Health Physics

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  1. Radiation Safety – Health Physics Neutron Scattering Summer School 2006 David Brown, NCNR Health Physics

  2. Training Outline - Radiation, Ionization, & Radioactivity - Radiation Dose - Radiation Safety - Questions ??

  3. Electromagnetic Radiation: Gammas and X-Rays

  4. Background Radiation US Average ~ 360 mrem/yr Denver, CO ~ 700 mrem/yr Brazil (beaches) ~ 5,000 mrem/yr

  5. Man Made Ionizing Radiation The NCNR Layout Reactor (generates neutrons) Neutron Experiment Stations Neutron Beam Tubes

  6. Radiation Exposure

  7. Types of Exposure

  8. Radiation Dosimetry Occupational Dose Limit = 5,000 mrem/yr General Public Dose Limit = 100 mrem/yr Average Dose to US Public = 360 mrem/yr Average Dose to NIST Researcher ~ 50 mrem/yr

  9. Health Physics Labels/Signs ~100,000 mrem/hr (localized dose rate) >5 mrem/hr (whole body dose rate) >100 mrem/hr (whole body dose rate)

  10. Radiation Detection / Measurement

  11. Time, Distance, and Shielding

  12. Distance – Inverse Square Law

  13. Shielding

  14. CampfireAnalogy

  15. Contamination Control Always monitor yourself and items you have with you when leaving a controlled area.

  16. Ionizing Radiation - Overview Can not see it, feel it, or smell it - we must rely on training and equipment to protect ourselves Relatively simple to detect and measure - unlike chemical and biological hazards - we can quickly assess and take action Biological effects have been intensely studied for 50 years

  17. Questions….?