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:
Effectiveness of Maintenance at Nuclear Power Plants,” which endorsed the May 1993 version of NUMARC 93-01. In January 1995, the NRC staff issued Revision 1 to Regulatory Guide 1.160 to reflect the amendment to 10 CFR 50.65(a)(3) that changed the requirement for performing the periodic evaluation from annually to once per refueling cycle, not to exceed 24 months between evaluations. From September 1994 to March 1995, the NRC staff conducted nine pilot site visits to verify the usability and adequacy of the draft NRC Maintenance Rule inspection procedure and to determine the strengths and weaknesses of the implementation of the rule at each site that used the guidance in NUMARC 93-01. NUREG-1526, “Lessons Learned from Early Implementation of the Maintenance Rule at Nine Nuclear Power Plants” (Ref. 7), issued June 1995, describes the findings. The NRC staff concluded that the requirements of the rule could be met more consistently across the industry if some clarifying guidance was added to NUMARC 93-01 to address the findings noted in NUREG-1526. The NRC staff met with industry representatives in a series of public meetings to discuss proposed revisions to NUMARC 93-01 that would address the findings of the site visits. Revision 2 to NUMARC 93-01 (Ref. 8), in April 1996 resulted from these meetings. By July 1998, Maintenance Rule baseline inspections at all U.S. nuclear power plant sites were complete. NUREG-1648, “Lessons Learned from Maintenance Rule Baseline Inspections” (Ref. 9), issued October 1999 describes the findings of the NRC staff Maintenance Rule baseline inspections at all U.S. nuclear power plant sites. NRC staff experience during the baseline inspections indicated that all licensees had developed programs to implement the recommended pre-maintenance 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