Event
- Event ID
- 734
- Quality
- Description
When waste alkali solution was taken out of dumper trucks into a waste liquid storage tank, a reaction occurred in the tank. As a result, the solution in the tank foamed over it, and reached an incinerator burning waste wood, when all the waste solution got in flames.
The cause of the incident was the waste alkali solution, which had a heavier specific gravity than water and sank and came into contact with aluminium powder that had accumulated at the bottom the tank. This resulted in generation of hydrogen gas, which was ignited by fire at the incinerator.- Event Initiating system
- Classification of the physical effects
- Hydrogen Release and Ignition
- Nature of the consequences
- fire
- Macro-region
- Asia
- Country
- Japan
- Date
- Component involved
- chemical storage tank (waste)
- Failure mode
- fire (generic)
- Initiating cause
- accidental hydrogen formation
- Root CAUSE analysis
The INITIATING CAUSE was the accidental generation of hydrogen gas, ignited by fire at the incinerator.
The ROOT CAUSE was identified by the original report in:
(1) Organization factor
(2) Design mistake
(3) Prior assessment insufficient.- Root causes
- Date entry in HIAD
- 01/01/2020
Facility
- Application
- Chemical industry
- Sub-application
- Chemical waste storage and disposal
- Hydrogen supply chain stage
- All components affected
iquidstorage tank, alkaly tank
- Process temperature range [C]
- ambient temperature (-50°C to +50°C)
- Location type
- Unknown
- Location
- industrial area
- Operational condition
Emergency & Consequences
- Number of fatalities
- 0
- Number of injured persons
- 0
- Currency
- Yen
- Property loss (onsite)
- 21.730.000
- Post-event summary
21.73 million yen worth of property damage
In-depth data
- Release type
- Gas-liquid mixture
- Involved substances (% vol)
- H2,
KOH solution,
Al - Release temperature [°C]
- 25
- Probable IGNITION SOURCE
References
- Sources categories
- RISCAD
- Reference & weblink
Orignal source lost. RISCAD is closed.
