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:
tigate the loss of the disabled function. a. If the diverse I&C system uses equipment that is not safety related, the equipment is of sufficient quality to perform the necessary function(s) during the associated event conditions. b. Sufficient diversity exists between the diverse I&C system and the proposed DI&C system so that they are not subject to the same postulated CCF. c. The equipment to be credited has functional capabilities sufficient to maintain the plant within the acceptance criteria defined in the FSAR or the LAR for the limiting events applicable to the proposed DI&C system. d. The LAR maintains the existing I&C system’s licensing basis in view of the new credited use, or the LAR identifies and analyzes those parts of the existing I&C system’s licensing basis that are being updated as a result of the proposed change. e. If prioritization is used, the new use of the credited existing I&C system maintains the existing prioritization scheme. If the new use of the existing I&C system requires changes to the existing prioritization scheme, the changes are consistent with the plant’s licensing basis, and safety and protection functions have the highest priority when resources are shared. The commands to actuate components needed for safety and protection are always performed over other functions. 3.2.2 Crediting Manual Operator Action10 When addressing Point 3 of SRM-SECY-22-0076, the applicant may credit a manual operator action as a diverse means either to accomplish a function that is the same as, or is different from the function credited in the D3 assessment or to mitigate spurious operation. To be creditable, manual operator actions should be performed within a time frame adequate to effectively mitigate the event. In addition, a human factors evaluation process, such as the process outlined in NUREG-0800, “Standard Review Plan for the Review of Safety Analysis Reports for Nuclear Power Plants: LWR Edition” (SRP), Chapter 18, “Human