Safety regions have the task of advising the competent authority on safety in spatial integration issues such as the establishment of an LNG fuellling station (in accordance with the Dutch external safety establishments decree [Bevi]). These LNG guidelines are intended as a tool for external safety advisers within the safety region. The guidelines examine the characteristics of LNG fuelling stations, the possible incident scenarios, control options, and recommended source and effect measures.
The following LNG incident scenarios are included in the guidelines:
- overpressure of LNG road tanker;
- failure of transfer hose of LNG road tanker when filling an LNG storage tank with underfilling;
- failure of transfer hose of LNG road tanker when filling an LNG storage tank with top filling;
- leakage during refuelling of LNG fuel tank of refrigerated transport truck;
- BLEVE (boiling liquid expanding vapour explosion) of LNG storage tank at LNG fuelling station;
- evaporator leakage;
- failure of fuelling hose and safety valve (incomplete closure up to 10% of the diameter);
- failure of fuelling hose and safety valve, full failure of ESD (emergency shut down).
For each of these scenarios, a general description has been included, the input variables and results of impact calculations as well as the probability of occurrence and the effect distances of the various physical effects are presented.
The LNG guidelines for regional safety advisors can be downloaded from the IFV’s website:
Handreiking EV advisering LNG [in Dutch only]