| Case Name |
Leakage of gas oil from a crack in the corroded part of a tank side wall due to an earthquake |
| Pictograph |
|
| Date |
May 28, 1983 |
| Place |
Japan |
| Overview |
On May 28th, 1983. The "Mid Japan Sea Earthquake" caused a crack in the side wall at a lower part of a gas oil tank, and gas oil oozed out. The crack was generated where stress concentrated, and it had corroded in the shape of a slot along a weld line. |
| Incident |
A crack was generated near drain piping of the side wall of a gas oil tank by "Mid Japan Sea Earthquake" of magnitude 7.7, and gas oil oozed out. Refer to Fig2. |
| Processing |
Storage |
| Substance |
Gas oil |
| Type of Accident |
Leakage |
| Sequence |
On May 28th, 1983. A crack was generated in the side wall of a gas oil tank by an earthquake, and gas oil oozed out. |
| Cause |
At the drain pit, an excessive load was applied to a joint at the bottom and a side wall. It had corroded in the shape of a slot along the weld line. |
| Countermeasures |
Conducting a periodic check of wall thickness using a measuring device.
Check a tank with a similar structure equipped with a concrete drain pit for SCC. |
| Knowledge Comment |
Although a natural disaster was the cause, faults in facilities can induce an accident. Daily management is very important. |
| Background |
A faulty design produced stress concentration. Moreover, corrosion was left untreated. The earthquake triggered the accident. |
| Incidental Discussion |
Edited by Nikkei mechanical "An accident is talking." According to p.132, Stress concentration and fatigue destruction: "Faulty fillet weld causes stress concentration." Was not corrosion along the weld line caused by lack of welding skills? |
| Reason for Adding to DB |
Example of accident caused due to an earthquake |
| Scenario |
| Primary Scenario
|
Poor Value Perception, Poor Safety Awareness, Inadequate Risk Recognition, Carelessness, Insufficient Understanding, Inadequate Risk Recognition, Planning and Design, Poor Planning, Overlooking of Repair Planning, Bad Event, Mechanical Event, Stress Concentration, Failure, Fracture/Damage, Crack, Secondary Damage, External Damage, Leakage
|
|
| Sources |
The Japan Soc. for Safety Engineering edition. Asamichi Kamei, Case of damage to oil tank and preventive measures, Accident examples of fire and explosion, pp.172-179 (2002).
National Res. Inst of Fire and Disaster, Asamichi Kamei, Case of damage to outdoor storage tank during an earthquake, Dangerous object accident case seminar, pp.55-67 (1995).
|
| Multimedia Files |
Fig2.Photograph of crack generated at lower part of side wall
|
| Field |
Chemicals and Plants
|
| Author |
ITAGAKI, Haruhiko (Japan National Institute of Occupational Safety and Health)
TAMURA, Masamitsu (Center for Risk Management and Safety Sciences, Yokohama National University)
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