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:
ce of the SSC through appropriate preventive maintenance and such that the SSC would remain capable of performing its function(s) and not fail in a manner adverse to safety will be reviewed during NRC inspection. ii. For reliability performance criteria, the process for defining, evaluating and treating functional failures, MR functional failures (MRFFs), maintenance-preventable functional failures (MPFFs), and repetitive MPFFs as prescribed by program procedures. 17.6-9 March 2007 iii. For availability performance criteria, the process for defining and tracking availability or unavailability (planned and unplanned), including exceptions and credits and the basis thereof, as prescribed by program procedures. The process should address safety/risk category considerations and the conditions under which unavailability is charged. iv. For condition monitoring criteria, the process for addresses sensing, surveillance, tracking & trending, action levels, predictive maintenance, etc., as prescribed by program procedures. v. The process for disposition of SSCs for which effective control of performance or condition is not demonstrated, including not meeting performance criteria or condition monitoring criteria, as prescribed by program procedures. Conditions under which the expert panel may justify not placing an SSC in 50.65(a)(1) status when performance criteria are not met/exceeded should be described. C. The process for identification and treatment of SSCs categorized in a "run-to- failure" status, including consideration of (a) SSC function(s) and success/failure criteria, (b) ability to detect degradation in performance or condition prior to failure, (c) ability to predict failure based on IOE (e.g., average failure rates, application vulnerabilities, mean times between failure, etc.) and vendor information, (d) consequences of failure (modes, effects, safety significance), both with and without prompt detection and correction/repair or replacement, (e) ability