The purpose of this report is to provide an update of information on the technical issues surrounding the creation, implementation, and maintenance of fitness-forduty (FFD) policies and programs. It has been prepared as a resource for Nuclear Regulatory Commission (NRC) and nuclear power plant personnel who deal with FFD programs. It contains a general overview and update on the technical issues that the NRC considered prior to the publication of its original FFD rule and the revisions to that

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... ule (presented in earlier NUREGKRs). It also includes chapters that address issues about which there is growing concern and/or about which there have been substantial changes since NUREGKR-5784 was published. Although this report is intended to support the NRC's rule making on fitness for duty, the conclusions of the authors of this report are their own and do not necessarily represent the opinions of the NRC. iii NURElG/CR-6470