Licensee event report sequence coding and search procedure: a training tool

At the request of the Nuclear Regulatory Commission's Office for Analysis and Evaluation of Operational Data (AEOD), the Nuclear Safety Information Center (NSIC) has undertaken the development of a detailed computer-compatible coding system for events and sequences of occurrences described in Licensee Event Reports (LERs). This task was conceived by AEOD and is designated the LER Sequence Coding and Search Procedure. The coding system is intended to describe the sequence of events detailed in the LER in a computer-readable and computer-searchable format. The NSIC has developed coding tables, a coding form and compatible computer software to permit storage and on-line computer search capability. The AEOD draft Watch List has been revised to categorize and retrieve identified situations of interest. The coding system provides an orderly presentation of occurrences that resulted because of an initiating event. The sequences could be used for training operators and maintenance personnel in transients that have actually occurred