Document: NRC Regulatory Guide
Document ID: 96ecfd93-e64a-4f35-93fe-d3b95daac61d
Document Type: regulatory_guide
Title: Monitoring the Effectiveness of Maintenance at Nuclear Power Plants + HISTORY –HISTORY 06/2018 – DG-1336 , Proposed Revision 4 09/2011 – DG-1278 , Proposed Revision 3 08/1996 – DG-1051 , Proposed Revision 2 06/1994 – DG-1031, Proposed Revision 1 11/1992 – DG-1020, Proposed Revision 0 (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1812/ML18129A080.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.160
CFR Part: 
CFR Title: 

Content:
nance assessment provision of the original 10 CFR 50.65(a)(3). However, the baseline inspections identified instances in which these DG-1336, Page 7 assessments were not performed (including some that caused a significant increase in risk) and identified weaknesses in licensees’ programs that could result in failures to perform adequate assessments before maintenance activities. Partly because of these inspection findings, the Commission approved an amendment to the Maintenance Rule, adding a new paragraph (a)(4) to ensure that licensees assess and manage increases in risk associated with maintenance activities. In a series of public meetings, the NRC staff met with industry representatives to discuss the change in the rule in relation to proposed revisions to Section 11, “Assessment of Risk Resulting from Performance of Maintenance Activities,” of NUMARC 93-01. In May 2000, the NRC staff issued RG 1.182, “Assessing and Managing Risk Before Maintenance Activities at Nuclear Power Plants” (Ref. 10), which endorsed the February 2000 revision to Section 11 of NUMARC 93-01. From December 2009 to March 2011, the NRC staff met with industry representatives in a series of public meetings to discuss additional revisions to NUMARC 93-01 that would improve implementation of the Maintenance Rule throughout the industry. Revision 4A to NUMARC 93-01 (Ref. 11), resulted from those meetings. Revision 3 of RG 1.160 (Ref. 12), was issued in May 2012 to endorse Revision 4A of NUMARC 93-01. Regulatory guide 1.182 was consequently superseded and was withdrawn in November 2012. In response to the accident at Fukushima in 2011, the industry developed diverse and flexible coping strategies known as FLEX that address beyond design basis accidents. The NRC staff met with NEI and industry representatives on August 23, 2016, as documented in “Meeting with Industry Stakeholders on Changes to NUMARC 93-01, Revision 4D, Industry Guideline for Monitoring Effectiveness of Maintenance