Figure 1 Connection Between NRC Regulatory Framework and Implementation Level Activities 6 First Principles of Protection Against Software CCF The first principles against software CCF represent a synthesis of EPRI research and industry best software design practices. The first principles listed in this section are considered bounding and complete and represent the starting point for decomposition of SDOs. They include the role software design defects play in the initiation of a systematic failure as well as first principle techniques to
