ITER safety studies have included the systematic identification of postulated initiating events (PIEs) that could start event sequences leading to potentially hazardous conditions. A transparent presentation is required to show the potential impact that each PIE may have on the plant. The PIE-potential impacts table (PIE-PIT) has been developed as an approach to this. An important aspect of the development is the determination of a set of Plant States that encompass all conceivable conditions in which a significant release of hazardous material to the environment can be postulated. This has been done for the ITER tokamak, leading to a set of 10 representative Plant States. Event sequences leading to such states generally require the independent failure of two or more confinement barriers, and are thus of very low frequency. A further set of 16 Plant States have been identified in which there is no significant release, but in which an ITER confinement function is challenged. The PIE-PIT can be used to find the most significant challenges, and eventually to lead to a new definition of a set of bounding events for future safety analyses. © 2002 UKAEA. Elsevier Science B.V. All rights reserved.
All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Materials Science(all)
- Nuclear Energy and Engineering
- Mechanical Engineering
Taylor, N. P., Gordon, C., & Pinna, T. (2002). Development of a potential initiator impacts table for ITER safety analyses. Fusion Engineering and Design, 63-64, 165 - 171. https://doi.org/10.1016/S0920-3796(02)00136-9