At around 8:55 p.m., a natural gas explosion (vapour cloud explosion - VCE) occurred on a bridge pier containing a polyethylene natural gas pipeline (DN125) passing through a stainless steel sheath, and a steel pipeline (DN 114). A fire had initially broken out at around 8 p.m. in a squat on another pier. The heat fluxes released caused the steel pipe to bend and the polyethylene pipe to melt. Natural gas was thus able to migrate through the sleeve via its couplings and form explosive pockets.
At about 6:30 a.m. on a Sunday, a fire was detected in a dangerous goods transport (DGT) company classified as a lower-tier SEVESO company. The fire broke out in a parked tanker lorry. With a capacity of 19 t, it contained just 1.5 t of liquefied petroleum gas (LPG). The fire spread to several other tanker lorries. The fire brigade, contacted by a third party, arrived at the scene at 7 a.m. The operator initiated its internal emergency plan, while the emergency services established a security perimeter and sprayed water on the accident.
At 7: [...]
A longitudinal rupture occurred at approximately 6 a.m. on a crude oil pipeline (DN 500, buried depth: 1 m in clayey soil; commissioning date: 1965; pressure: 69 bar) at 1.5 km from a nature reserve. No disturbance or pressure surges in the pumping operation were observed before the accident. The pipeline was shut down and isolated when alarms sounded in the control room. Soil and trees over 6.4 ha were polluted by hydrocarbons.
After locating the leak, the operator initiated its safety and intervention plan (SPI) at around 8 a.m. A safet [...]