Safety Flash
Partial pressure of oxygen (PPO₂) getting low in bell
Partial pressure of oxygen (PPO₂) getting low in bell
- IMCA
- Safety Flash
- IMCA SF 12/19
- DivingMachinery and EquipmentPressure Systems
- Human factorsOxygen deficiency
- Saturation diving
- Diving bellGas cylinderOperator displays and control interfacesValve
- Competence and trainingEmergency responseHuman-centred designOperating and work procedures
- Subsea
Summary
During saturation diving at approximately 147 msw, oxygen partial pressure fell in a bell and the main oxygen bottle was subsequently found empty. The flash describes breathing-mix purging, BIBS use and recovery, followed by changes to oxygen make-up responsibilities, panel positioning, valve configuration and buffer-tank connections.
Classifications: Human factors; human performance; ergonomics.
Classifications: Oxygen deficiency; oxygen deficient; oxygen displacement; oxygen depletion.
Classifications: Saturation diving; sat diving.
Classifications: Diving bell; closed bell; wet bell.
Classifications: Gas cylinder; compressed gas bottle; gas cylinders.
Classifications: Operator displays and control interfaces.
Classifications: Valve; valves.
Classifications: Competence and training; competency assurance; safety training.
Classifications: Emergency response; emergency preparedness.
Classifications: Human-centred design.
Classifications: Operating and work procedures.
Classifications: Subsea; underwater worksite.
Summary
Incorrect operation of an oxygen panel caused a saturation bell’s oxygen supply to become depleted.
IMCA SF 12/19. Themes: diving, machinery and equipment, pressure systems.