EFcalc - Event/Fault Tree Calculator
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Broken Top-Level Gate Names List (*.btl) [optional]

Accidents do not break basic events but instead force top-level gates to be failed. The *.btl file contains a list of the names of broken top-level gates. 

     loop
     loca

If the *.btl file is not present, it will be assumed that no top-level gate is forced to be failed.

Oak Ridge National Laboratory, 2004

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