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:
ans to address the CCF have been applied: a. The application identifies the CCF vulnerabilities or causes. If these CCF vulnerabilities or causes are identified using a hazard analysis technique, then the analysis should be demonstrated to be sufficiently correct and complete. b. The application describes how the applicant addressed the CCF vulnerabilities or causes and any potential spurious operations, including any conditions or limitations. This description includes supporting information and reasoning. c. The application includes a technical basis explaining how the applicant addressed the identified CCF vulnerabilities or causes and will prevent or mitigate their effects. The technical basis also explains how the effectiveness of the methods used for prevention or mitigation will be demonstrated. If a postulated CCF is risk significant and the application does not demonstrate the adequacy of design techniques, prevention measures, or mitigation measures, then the diverse means provided should be reviewed using the guidance in Section B.3.2. 4. Manual System-Level Actuation and Indications to Address Point 4 Point 4 of SRM-SECY-22-0076 states that MCR displays and controls that are independent and diverse from the proposed DI&C system (i.e., unlikely to be subject to the same CCF) must be provided for manual system-level actuation of critical safety functions (which may have been determined using risk information) and for monitoring of parameters that support the safety functions. Section B.1.2 provides information on critical safety functions. Point 4 also states that the applicant may alternatively propose a different approach to this point in SRM-SECY-22-0076 if the plant design has a commensurate level of safety. The reviewer should verify that the displays and manual controls provided to meet Point 4 are not vulnerable to the same CCF as the proposed DI&C system. For example, the point at which the credited manual controls are connected to the safety