ALARA

• An ALARA study will be performed prior to the start of D&D operations and removals.
  
  
  • This study will review the D&D activities, estimated personnel exposures and controls which will be used during D&D.
    
    
  • The study will account for both component activation and Tritium contamination issues.
    
    
  • The safety and protection of the work force will be the primary concern during the D&D removals.
    

Tritiated Oil Removal

• Several diagnostic tools will be utilized to locate the tritiated oil in the vacuum/diagnostic lines.
  
  
  • Fiber-optic borescope
    
    
    • The borescope allows personnel to visually observe the inside condition of the various vacuum lines in the basement and Tritium Area. (35 ft. long x 9mm diameter with 54 degree field of view)
      
      
  • Ultrasonic device
    
    
    • This diagnostic technique can be used where the borescope can not reach. It can detect partially oil filled sections of tubing/piping
      
      
    • The ultrasonic unit cannot be used with double walled tubing/piping
      
      

Controls During Vessel Segmentation

• During the "Diamond Cutting" operation of the vacuum vessel, controls are needed to minimize personnel exposure from any Tritium contaminants. Containment for the cutting slurry mix and for air borne release will be required.
  
  
• Diamond cutting trials will be performed this summer at PPPL to gather information and gain experience in containing the generated particulate.

Elephant Trunk Stations

• The elephant trunk stations provide local ventilation for removing trace elements of Tritium, which may be present during line, breaks on Tritium contaminated components. Its purpose is to reduce possible tritium exposure (ALARA) to individuals working on those systems.

Variable Flow System

• A Variable Flow System will be used to maintain a negative pressure in the vacuum vessel during port removals. This will help to minimize the exposure of personnel to the tritiated atmosphere during vessel openings.
  
  
  • The system consists of connecting the vacuum vessel to the Test Cell exhaust system via a 12-inch damper. A system, with electronic differential gauges, monitors and controls the flow rate to ensure proper negative pressure in vessel.

Gloveboxes

• Glove boxes can be used during the removal of diagnostics, organ pipes, etc. where high levels of contamination may be expected. The gloveboxes allows the workers to be closer to their work while maintaining a safe environment and minimizing personnel exposure to tritium contamination.

Inflatable Work Tents

• Inflatable work tents can be used to reduce exposure to surrounding areas during processing of contaminated components.