Abstract
The challenges related to problem of assessment of actual diversity level and evaluation of diversity-oriented NPP I&C systems safety are analyzed. There are risks of inaccurate assessment and problems of insufficient decreasing probability of CCFs. CCF probability of safetycritical systems may be essentially decreased due to application of several different types of diversity (multidiversity). Different diversity types of FPGA-based NPP I&C systems, general approach and stages of diversity and safety assessment as a whole are described. Objectives of the report are: (a) analysis of the challenges caused by use of diversity approach in NPP I&C systems in context of FPGA and other modern technologies application; (b) development of multi-version NPP I&C systems assessment technique and tool based on check-list and metric-oriented approach; (c) case-study of the technique: assessment of multi-version FPGA-based NPP I&C developed by use of Radiy^<TM> Platform.
