[en] The fracture mechanics procedures required to evaluate indications found during in-service inspection of reactor pressure vessels are specified in the ASME Boiler and Pressure Vessel Code, Section XI. This report describes the computer program, FACET, which performs quickly and accurately the flaw evaluation specified in Appendix A of Section XI. Specifically, FACET determines the crack-tip stress intensity factor range, the corresponding crack growth and whether the maximum crack size that could develop during the remaining service life approaches the minimum crack size allowable. FACET is written in FORTRAN and presently runs on an IBM 370/168 computer. Various input and output options are available; FACET can utilize either actual materials data or the conservative estimates which are provided in Section XI