The purpose of this discussion is to describe the Quantitative Micro-Nano (QMN) project. The QMN approach is directed toward predicting SCC in components of the primary and secondary systems of water-cooled nuclear plants. Two week-long meetings, QMN-1 and QMN-2 have been held in the last two years, 2010 and 2011. A third meeting is being planned for 2012 in June. The QMN program is based on the five segments of initiation and propagation: initial condition, precursors, incubation, proto-cracks, and propagation of larger cracks. Each of these segments is the subject of specific meetings where the detailed atomic processes are described and quantified. These mechanistic elements will then be synthesized into overall models. This same approach is being taken in structural biology and electronic materials. QMN benefits from presently available methods for characterizing structure and chemistry at an atomic level and then manipulating the results with arrays of multi-particle computer models. Participation in the QMN meetings is organized by a scientific advisory committee that recommends topics and presenters.