Abstract
Abstract The models used in probabilistic risk assessment (PRA) by the nuclear industry are supported by a wide variety of computer software. In fact, prior to the publication of the WASH-1400 in 1974, researchers and practitioners had already initiated the software development process leading to today's advanced and user-friendly PC-based software packages. NUS Corporation initiated its PC code development in the early 1980s. After testing a number of prototypes, a first integrated package supporting all parts of the Level 1 PRA was launched in 1987. This software package, called NUPRA, is an implementation of an approach based on minimal cutset equations and it has been used to install ten PRA studies on a PC. Insights from applications are now used to enhance the current NUPRA package to cover Level 2 and Level 3 analysis needs. In this paper the experience of using the NUPRA software is documented.
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