City CouncilSeptember 17, 2013

RADIATION HEALTH AND SAFETY

Agenda

1. Radioactivity is everywhere2. Health and Safety in Context3. Pipeline/Treatment Plant

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

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

<Treatment

35 pCi/L

1.2 pCi/L

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/g

1.37 pCi/g

Lantern Mantle Zircon Tile Dry wall

Granite Countertop

Soil Beans

Banana

Bones

Radiation Source and Effect of Shielding

• Radiation Source• Shielding A: ½” Steel Plate• Shielding B: CMU Block

Radiation Dose Is Minimal

1 Pelvic CT orStress Test

Yearly Dose From Nature

Yearly Dose to Plant Staff

1,000

300

30

Dose(mrem)

4 Mammograms70

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

This Plant Is Safe

• Treatment Includes:

• Water • Air• Anthracite• Zeolite• Radium

No explosives No flammables

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

No Long-Term Storage or Liability for Spent Media

GWTP

Licensed DisposalFacility

Groundwater Treatment Plant is Safe

City CouncilSeptember 17, 2013