Document: NUREG-0800
Document ID: 41723229-6e99-476f-9bae-0cad73a92dca
Document Type: srp
Title: HUMAN FACTORS ENGINEERING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0236/ML023650383.pdf
Revision Date: 2023-06
Chapter: 18
Section ID: 18.0
CFR Part: 
CFR Title: 

Content:
and other significant HSls.- Modifications may be extensive, such as a large-scale modernization of control room HSIs, using computer-based technology as part of a digital I&C upgrade program. Such a program can result in substantial modifications to alarms, controls, and displays that are associated with structures, systems, and components (SSCs) important to safety; thus a new or common-cause failure can be created that is not bounded by lrevious analyses or evaluations. -Such-a modification may be considered potentially significant to plant safety, per .10 CFR 50.59(c)(2). Additional guidance related to 10 CFR 50.59 is provided in Regulatory Guide (RG) 1.187, "Guidance for Implementation of 10 CFR 50.59, Changes, Tests, and Experiments," (NRC, 2000) and Nuclear Energy Institute (NEI) publication 96-07, "Guidelines for 10 CFR 50.59 Implementation," (NEI, 2000). 3. Review of the HFE Aspects of Modifications Affecting Risk-Important Human Actions The NRC staff.reviews voluntary modifications to ensure they are acceptable. This chapter can also be used to review-changes ormodifications to licenses for nuclear power plants that include changes to human actions, e.g., a license amendment request. While HSI modernization may be a large-scale modification', even smaller-scale modifications may be risk-important, especially when they affect operator actions that are credited in the SAR. An HFE review is conducted if such a modification affects the role of personnel or the tasks they perform and is potentially significant to plant safety. Modifications affect the role oi tasks of personnel if they impose new or different demands on them to operate or maintain the plant, or otherwise ensure safety. An example of such a modification would be substituting manual actions for aautomatic actions for performing- design functions described in the updated final safety analysis report (UFSAR) A modification may be considered potentially significant to plant safety, per the criteria