LNG produced at Discovery LNG would be stored in specially designed LNG storage tanks that are insulated to keep the LNG cold and contained until it is shipped and regasified offsite. LNG Containment storage tanks have a capacity of 150,000m3 to 180,000 m3 net capacity each.
Although specific designs of Discovery LNG’s structure have yet to be investigated, to prevent leakage in LNG structures, primary containment structures would be designed from low temperature-resistant materials, such as high nickel content steel alloys, aluminum, stainless steels and reinforced concrete. Secondary containment will also be used to limit leaks to areas where ignition sources are excluded or strictly controlled.
Leak detection methods would include monitoring of vapour pressure, temperature and liquid level, as well as direct sensing of gas outside primary containment.
There is a very low probability of a major release of LNG during normal industry operations due to the safety systems that will be in place. In the case of an accidental release, the project is being designed with emergency shutdown systems and emergency fire detection and protection, while the danger to the public is reduced or eliminated by the separation distances of the design.
LNG operations are industrial activities, but safety and security designs and protocols help to minimize even the most uncommon kinds of industrial and occupational incidents that might be expected. Furthermore, every employee at Discovery LNG would receive comprehensive training on safety and be extensively tested before they are permitted to work on the site.