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Oxygen Deficiency Hazards ODH SAF 103 Patty Hunt

Oxygen Deficiency Hazards ODH SAF 103 Patty Hunt. ODH - Oxygen Deficiency Hazards. POLICY. Personnel will not enter or occupy areas in which oxygen concentration is less than 19.5%. 1. Health Effects of ODH 2. ODH Hazards that can be Encountered at Jefferson Lab:

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Oxygen Deficiency Hazards ODH SAF 103 Patty Hunt

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  1. Oxygen Deficiency HazardsODHSAF 103Patty Hunt

  2. ODH - Oxygen Deficiency Hazards POLICY Personnel will not enter or occupy areas in which oxygen concentration is less than 19.5%

  3. 1. Health Effects of ODH • 2. ODH Hazards that can be Encountered at Jefferson Lab: • Cryogenic and Non Cryogenic Sources • 3. Special Hazards from handling Ultracold Liquids • 4. Jefferson Lab Controls for Cryogenic ODH: • Identification and Classification of ODH Areas • Worker Requirements for Entry into ODH Areas • Engineering Controls Used to Reduce ODH Hazards • Emergency Response Procedures ODH training objectives

  4. Training provides • THIS TRAINING DOES PROVIDE: • qualification for entry to ODH 0 and ODH 1 areas • retraining required every 12 months • ODH 2 AND HIGHER WORK REQUIREMENTS REQUIRE • medical approval THIS TRAINING DOES NOT QUALIFY YOU FOR CONFINED SPACE ENTRY.

  5. Visitor requirements Have your supervisor’s permission escort the visitor: one ODH qualified escort per visitor explain the ODH hazards to the visitor before allowing them to enter the ODH area To bring a visitor into an ODH 0 or 1 area you must: TOUR GROUP REQUIREMENTS: OSP/TOSP

  6. OSP

  7. N2 vent

  8. Manure pit

  9. Nitrogen Bubble

  10. Freon 400 times volume 1 Liter

  11. Helium 1000 times volume 1 Liter

  12. Argon 300 ft 3 Compressed Gas Cylinder (See next slide)

  13. A nitrogen spill from a CGC fills 300 cubic ft. or a room 10 ft. X 10 ft. 3 feet above floor level. Argon continued 3 feet 10 ft. 10 ft. Compressed gas cylinder

  14. 6000 ft 3 Dewar Argon (See next slide)

  15. A nitrogen spill from a dewar would fill a 10’ X 10’ room 60 feet high, covering 6000 ft3. Argoncontinued 60 feet 10 ft. 10 ft.

  16. Gas shed

  17. Site ODH Areas

  18. Site ODH Areas

  19. Test lab tank

  20. Dewar service bldg

  21. 4 Important Properties of Cryogens • Cryogens can liquify other gases. • Cryogens can cause frost bite. • Cryogens have high expansion ratio on vaporization. explosion hazard ODH hazard • Cryogenic gases rise or sink depending on density.

  22. Relay Rack Injector Service Bldg. Counting House Endstation Tunnel

  23. H e l i u m S e r v i c e B u i l d i n g E l e c t r o n i c R e l a y R a c k s 2 5 F t C r y o m o d u l e T u n n e l

  24. Helium Transfer Line

  25. PPE

  26. Helium Transfer Line

  27. Pressure relief valves

  28. Nitrogen small plume

  29. Nitrogen large plume

  30. Helium lintel

  31. Lintel in tunnel

  32. Exhaust duct

  33. Closed penetration

  34. Properties of Gas Nitrogen .97

  35. Hazard Avoidance WHEN ALARM SOUNDS:  EVACUATE  DO NOT ENTER PLUME  NOTIFY CREW CHIEF

  36. Helium Service Building Electric Relay Racks 25 ft Cryomodule Tunnel

  37. Tunnel plume

  38. Exit stairwell

  39. Injector Service Building

  40. Racks

  41. Penetration

  42. Penetration plume

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