4. Identification and accidental risks analysis and prevention methods:
(a)detailed description of the possible major accident scenarios and their probability or the conditions under which they occur including a summary of the events which may play a role in triggering each of these scenarios, the causes being internal or external to the installation;
(b)assessment of the extent and severity of the consequences of identified major accidents;
(c)description of technical parameters and equipment used for the safety of installations.