SEARCH Articles Figures Tables Analysis of Initiating Events Beyond-Design-Basis Initiating Events Developing Accident Scenarios and Initiating Events Events accident-initiated event Events initiating event Failures initiating events, frequency Fault tree analysis initiating event Identification of Initiating Events Initial Events after the Fulfillment of Dormancy Initial photochemical event Initiating Event Frequencies Initiating Event Frequency and Mitigation System Unavailability Initiating Events and Scenarios Initiating event frequency analysis, risk Initiation events Molecular initiating event Non-accident-initiated event POSTULATED INITIATING EVENTS FOR RESEARCH REACTORS Photosynthesis initial photochemical event Postulated initiating events Quantitative risk analysis initiating event Selection of Initiating Events TYPICAL INITIATING EVENTS The Initial Ionization Event