Document: NUREG-0800
Document ID: 081a217e-3707-4233-964d-398c43368dd2
Document Type: srp
Title: MAINTENANCE RULE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0708/ML070810004.pdf
Revision Date: 2023-06
Chapter: 17
Section ID: 17.6
CFR Part: 
CFR Title: 

Content:
f those SSCs’ reliability. (c) Whose failure could prevent safety-related SSCs from fulfilling their safety-related functions. Systems and system interdependencies should be discussed, including the method for determining failure modes of non-safety-related SSCs that could directly affect safety-related functions. The term "directly" applies to non-safety-related SSCs whose failure could prevent a safety function from being fulfilled; or whose failure as a support SSC could prevent a safety function from being fulfilled. (d) Whose failure could cause scrams or unwanted engineered safeguard feature actuations and those whose failure caused a reactor SCRAM or actuation of safety-related systems at the applicant’s plant or plants of similar design. This discussion should include the method for identifying relevant utility-specific and industry-wide operating experience. B. Specific information on the actual structures, systems, or components (SSCs) within the scope of the MR program will be reviewed as part of the operational program implementation inspection by the NRC, including, for each SSC in scope, the following: i. Specific MR requirement(s) in paragraph 50.65(b) that require the SSC to be in scope. ii. For each SSC, for each paragraph 50.65(b) scoping criterion, the function(s) that require the SSC to be in scope. iii. For each SSC, for each paragraph 50.65(b) scoping criterion, as applicable, the failure modes and effects that require the SSC to be in scope. iv. For each SSC scoping function or vulnerability, the functional performance requirements/success criteria and/or functional failure definitions and implications. C. The applicant’s submittal should describe the process for determining the safety/risk significance classification of SSCs within the scope of the MR program as prescribed by program procedures, including risk metrics/importance measures and values, operating experience, vendor information, D-RAP scope (or modified O-RAP scope as