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: 

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determine the acceptability of the proposed method in accordance with the acceptance criteria described below. Generally, the proposal of an approach other than diversity or testing should consist of (1) a BTP 7-19-22 Revision 9 — May 2024 description of its purpose and conditions of use, (2) a description of the method, (3) criteria for determining that the method will achieve its purpose, and (4) supporting information and reasoning demonstrating that the applicant’s implementation satisfies these criteria with appropriate means to address the CCF. Acceptance Criteria for Use of a Proposed Alternative Approach If an application proposes an alternative approach to eliminate a CCF from further consideration, the reviewer should conclude that the application provides sufficient information on the alternative approach if the application includes the following: a. the identification of the CCF vulnerabilities or causes that the proposed alternative approach addresses (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. a description (including supporting information and reasoning) of how the proposed alternative approach addresses the CCF vulnerabilities or causes and any potential spurious operations, including any conditions or limitations for the alternative approach c. a technical basis explaining how the alternative approach addresses the identified CCF vulnerabilities or causes and prevents or mitigates their effects, including an analysis of how the methods’ effectiveness will be demonstrated 3.1.4 Use of a Qualitative Assessment and Failure Analysis to Eliminate the Potential for Common-Cause Failures from Further Consideration RIS 2002-22, Supplement 1, describes a methodology, called “qualitative assessment,” to assess the likelihood of failure due to CCF in DI&C systems and components. RIS 2002-22, Supplement 1, identifies