City council 9 17-13 radiation presentation
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City council 9 17-13 radiation presentation Presentation Transcript

  • 1. City Council September 17, 2013
  • 2. RADIATION HEALTH AND SAFETY
  • 3. Agenda 1. Radioactivity is everywhere 2. Health and Safety in Context 3. Pipeline/Treatment Plant
  • 4. Radioactivity Is Present Everywhere Source: Dose (mrem/yr) Soil 28 Outer Space 27 Atmosphere 1 Radon 200 Body 39 Total: (U.S. Average) ~300 Adapted from Bushong, 1994
  • 5. Radioactivity Is In Many Common Things 0.92 pCi/L 0.6 pCi/L 0.08 pCi/L Average < 2.5 pCi/L 5 pCi/L <Treatment35 pCi/L 1.2 pCi/L
  • 6. Radioactivity Is In Many Common Things 108,000 pCi/g 472 pCi/g 14 pCi/g 0.72 pCi/g 0.038 pCi/g 3.5 pCi/g 0.01 pCi/g1.37 pCi/g Lantern Mantle Zircon Tile Dry wall Granite Countertop Soil Beans Banana Bones
  • 7. Radiation Source and Effect of Shielding • Radiation Source • Shielding A: ½” Steel Plate • Shielding B: CMU Block
  • 8. Radiation Dose Is Minimal 1 Pelvic CT or Stress Test Yearly Dose From Nature Yearly Dose to Plant Staff 1,000 300 30 Dose (mrem) 4 Mammograms 70
  • 9. Your Groundwater Treatment Plant is Designed for Safety • Monitors for any radiation exposure  ½” Lined-Steel Pressure Vessels  Sloped and Epoxy- Coated Floor  Containment Sump  Limited Access to Building  Small amounts of naturally occurring radon vented from building  Masonry provides shielding
  • 10. This Plant Is Safe • Treatment Includes: • Water • Air • Anthracite • Zeolite • Radium  No explosives  No flammables
  • 11. Raw Hickory Pipeline Breaks Pose No Significant Environmental Impact Pipe Break Stream Livestock Soil Time to Regulatory Limit 2.3 Years @ 9 MGD 240 Days @ 9 MGD No Environmental Impact
  • 12. No Long-Term Storage or Liability for Spent Media GWTP Licensed Disposal Facility
  • 13. Groundwater Treatment Plant is Safe
  • 14. City Council September 17, 2013