DNV has performed a detailed study on the consequences of marine LNG releases. The purpose of the study was to provide an independent, objective and validated analysis of LNG marine events that could be used by all parties to address concerns related to the development of LNG import and export facilities.

Based on advanced computer models and detailed knowledge of the design and operation of LNG ships, DNV predicts smaller hazard zones than those quoted by some previous studies. DNV believes earlier studies did not sufficiently credit the design features of LNG ships and thus used non-credible or overly pessimistic assumptions of rupture sizes and LNG spill volumes.

The study noted that the historical record of LNG shipping suggests that an accidental large-scale release is unlikely to occur in the foreseeable future of the LNG trade in the USA. The excellent safety record is due to the combination of very robust vessel design (with four to five physical barriers between the cargo and the environment), well executed vessel operations (driven by the IMO and global industry standards) and port state precautions (driven by organisations such as the US Coast Guard).

In preparing the study, DNV sought advice and input from a wide and varied range of other organisations, such as the 23 sponsor companies and other research institutes. DNV also consulted with Sandia National Laboratories, which provided useful interaction regarding DNV's approach and assumptions. However, no specific data were provided to DNV by Sandia nor has DNV viewed their report.