Controls/Aids Used for Tritium
- 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
- Several diagnostic tools will be
utilized to locate the tritiated oil in the vacuum/diagnostic
- 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
- 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
- Diamond cutting trials will be
performed this summer at PPPL to gather information and gain
experience in containing the generated particulate.
- 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.
- 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.
- 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
- Inflatable work tents can be
used to reduce exposure to surrounding areas during processing of