Document: NUREG-0800
Document ID: fe8ec6c2-e960-404c-854f-55c77bde1672
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML2400/ML24005A077.pdf
Revision Date: 2024-05
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
lable, and accessible under the postulated event conditions. The reviewer may use the HFE principles and criteria identified in SRP Chapter 18 to evaluate the applicant’s selection and design of the displays and controls. In addition, the reviewer may use the guidance in NUREG-1764, Revision 1, “Guidance for the Review of Changes to Human Actions,” issued September 2007, to perform a risk-informed evaluation of the application. In most cases, when displays and manual controls are credited as the diverse means for Point 3, they may also be credited for Point 4 for manual actuation of critical safety functions (see sections B.1.2 and B.4). Protective Actions Initiated Solely by Manual Actions For protective actions initiated solely by manual controls, the reviewer should consider appropriate HFE criteria and adequate equipment and controls. RG 1.62 provides guidance for evaluating the adequacy of equipment and controls used to manually initiate protective actions that are otherwise provided by automatically initiated safety systems. SRP Chapter 18 provides guidance for evaluating credited manual actions. Acceptance Criteria for Manual Actions If the following acceptance criteria are met, the reviewer should conclude that the proposed manual operator action is acceptable: a. The proposed manual operator action has been validated as both feasible and reliable, using an HFE process such as that specified in SRP Chapter 18. The application describes human performance requirements and relates them to the plant safety criteria. The application employs recognized human factors standards and design techniques to support the described human performance requirements. b. The SSCs used to support the manual operator action are diverse from (i.e., unlikely to be subject to the same CCF as) the equipment performing the same function within the DI&C system. c. The credited SSC is accessible to the operator during the associated event conditions, is capable of functioning under