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
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CFR Title: 

Content:
ety functions before beginning maintenance activities on structures, systems, and components (SSCs) within the scope of the maintenance rule (Final Rule, Monitoring the Effectiveness of Maintenance at Nuclear Power Plants, 64 FR 38,551 (July 19, 1999)). The amendments clarify that these requirements apply under all conditions of operation, including shutdown, and that the assessments are to be used so that the increase in risk that may result from the maintenance activity will be managed to ensure that the plant is not inadvertently placed in a condition of significant risk or a condition that would degrade the performance of safety functions to an unacceptable level. These amendments permit licensees to limit the scope of the assessments to SSCs that a risk-informed evaluation process has shown to be significant to public health and safety. On June 1, 2000, the NRC announced the availability of Regulatory Guide 1.182, “Assessing and Managing Risk Before Maintenance Activities at Nuclear Power Plants” and specified the effective date for the July 19, 1999 amendment to the maintenance rule (Final Rule, Monitoring the Effectiveness of Maintenance at Nuclear Power Plants; Confirmation of Effective Date and Availability of Guidance, 65 FR 34,913 (June 1, 2000). In 1999, the NRC made a change to 50.65(b)(1) to conform with changes to other regulations associated with the alternative source term rule (Final Rule, Use of Alternative Source Terms at Operating Reactors, 64 FR 71,990 (Dec. 23, 1999)). In 2007, the NRC amended its regulations by revising the provisions applicable to the licensing and approval processes for nuclear power plants (i.e., early site permit, standard design approval, standard design certification, combined license, and manufacturing license)(Final Rule, Licenses, Certifications, and Approvals for Nuclear Power Plants, 72 FR 49,352 (Aug. 28, 2007)). Paragraph 50.65(a) was revised to clarify that holders of operating licenses issued under Part 50