Document: NUREG-0800
Document ID: f269e894-c94c-4ccb-b41c-6e39aa74f371
Document Type: srp
Title: HUMAN FACTORS ENGINEERING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070670253.pdf
Revision Date: 2023-06
Chapter: 18
Section ID: 18.0
CFR Part: 
CFR Title: 

Content:
ld consider the following: C Functional requirements analyses for modifications that are likely to change existing safety functions, introduce new functions for systems supporting safety functions, or involve unclear functional requirements that may be important to safety. C Function allocation analyses for modifications that are likely to change the allocation between personnel and plant systems of functions important to safety. C A change in an operator’s role due to a modification should be examined within the context of its effects on the operator’s overall responsibilities. B.4 Task Analysis The following considerations should be addressed in the review of plant modifications that are likely to affect human actions (HAs) previously identified as risk-important, cause existing HAs to become risk-important, or create new actions that are risk-important: C The tasks analyses should be revised and updated to reflect requirements of the modification; the scope should include tasks involving the modification and its interactions with the rest of the plant, including those resulting from functions addressed in the analyses of functional requirements and function allocation. For maintenance, tests, inspections, and surveillances, attention should be given to risk-important actions that are new or supported by new technologies (e.g., new capabilities for online maintenance). C The task analysis should identify the design characteristics of the existing HSIs that support the performance of experienced personnel (e.g., support high levels of performance during demanding situations). 18.0-15 Revision 2 - March 2007 B.5 Human-System Interface Design The following considerations should be addressed in the review of design modifications: C The extent to which HSI modifications are consistent with users’ existing strategies and the licensee’s SAR and Chapter 18 commitments. C The extent to which HSI modifications support crew coordination C The degree to which the HSI