There are numerous suggestions for the use of hydrogen in energy systems. Ground transportation systems have developed to the point where experimental and prototype vehicles are operating in several countries. While economic factors predominate, safety aspects are an important issue particularly as hydrogen fuel would be used in close proximity with the general public.

This paper is based on the work carried out by Chemetics International Company, on behalf of the National Research Council.

Potential systems for the transmission, storage, distribution, refuelling and in-vehicle storage were selected. Schematic designs were developed and each subjected to the Hazard Identification procedure known as “Hazard & Operability Studies”.

This paper outlines the strategy, the Hazard Identification approach and the results achieved with particular reference to an LH2 refuelling station. A method of classifying the data is described and an outline is given of the reasons for a proposed safety steering committee.