SAFETY SOFTWARE RELEASE OPTIONS TO SUPPORT PLANT START-UP COMMISSIONING ACTIVITIES

摘要

The schedule demands on new nuclear power plant site testing and commissioning programs challenge the plant's Instrumentation and Control (I&C) supplier's ability to provide certified safety software releases to meet the needs of these programs. This paper outlines the typical certified safety software development and certification process which follows a Waterfall software lifecycle model. The conflicts that result between supporting the site program and the safety software supplier's internal certification program are identified. An adapted "functional" safety release process is presented that supports the site program's needs for software changes and in parallel enables the safety software certification process to proceed. Comparisons between the two safety software release processes are examined and the benefits realized through the use of the adapted "functional" safety software release process are discussed.