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: 
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ce for implementing the mandatory information collections in 10 CFR Parts 50 and 52 that are subject to the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.). These information collections were approved by the Office of Management and Budget (OMB), under control numbers 3150-0011 and 3150-0151, respectively. Send comments regarding this information collection to the FOIA, Library, and Information Collections Branch (T6 A10M), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by email to Infocollects.Resource@nrc.gov, and to the Desk Officer, Office of Information and Regulatory Affairs, NEOB-10202 (3150-0011 and 3150-0151), Office of Management and Budget, Washington, DC 20503. Public Protection Notification The NRC may not conduct or sponsor, and a person is not required to respond to, a collection of information unless the document requesting or requiring the collection displays a currently valid OMB control number. ____________________________________________________________________________ BTP 7-19-42 Revision 9 — May 2024 BTP Section 7-19, Revision 9, GUIDANCE FOR EVALUATION OF DEFENSE IN DEPTH AND DIVERSITY TO ADDRESS COMMON-CAUSE FAILURE DUE TO LATENT DESIGN DEFECTS IN DIGITAL INSTRUMENTATION AND CONTROL SYSTEMS Description of Changes This branch technical position section updates the guidance previously provided in Revision 8, issued January 2021 (Agencywide Documents Access and Management System Accession No. ML20339A647). The purpose of this update is to implement the expanded policy in SRM-SECY-22-0076, “Staff Requirements—SECY-22-0076—Expansion of Current Policy on Potential Common Cause Failures in Digital Instrumentation and Control Systems” (ML23145A181 and ML23145A182), for addressing common-cause failures in digital instrumentation and controls. The update provides guidance for the review of risk-informed defense-in-depth and diversity assessments, in addition to the existing guidance for assessments based on