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Title: Categorization of PWR accident sequences and guidelines for fault trees: seismic initiators

Technical Report ·
DOI:https://doi.org/10.2172/6513598· OSTI ID:6513598

This study developed a set of dominant accident sequences that could be applied generically to domestic commercial PWRs as a standardized basis for a probabilistic seismic risk assessment. This was accomplished by ranking the Zion 1 accident sequences. The pertinent PWR safety systems were compared on a plant-by-plant basis to determine the applicability of the dominant accident sequences of Zion 1 to other PWR plants. The functional event trees were developed to describe the system functions that must work or not work in order for a certain accident sequence to happen, one for pipe breaks and one for transients.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
6513598
Report Number(s):
UCID-20211; ON: DE85001587
Country of Publication:
United States
Language:
English