Document: NRC Regulatory Guide
Document ID: 151ab883-1221-4a79-88d6-a2631cce2239
Document Type: regulatory_guide
Title: Decommissioning of Nuclear Power Reactors (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2134/ML21347A080.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.184
CFR Part: 
CFR Title: 

Content:
52.110(g), as appropriate, requires the licensee to notify the NRC, in writing with a copy to the affected States, before it performs any decommissioning activity that could be considered inconsistent with, or a significant schedule change from, the planned decommissioning activities or schedules described in the PSDAR, including changes that significantly increase the decommissioning cost. Changes to the PSDAR may be in the form of a written letter to the NRC describing the change or may be an actual revision to the PSDAR. The NRC staff will use changes to the milestone schedule provided in the PSDAR to schedule inspections of the licensee’s activities and ensure that the licensee is conducting decommissioning safely and in accordance with the applicable regulatory requirements. Examples of changes in activities and schedule include, but are not limited to, changing from long-term storage (SAFSTOR) to active dismantlement (DECON), changing the method used to remove the reactor vessel or steam generators from cutting and segmenting to intact removal, or changing the schedule to affect major milestones such as shortening the overall term to complete decommissioning. Licensees do not need to report changes related to the removal of SSCs that are not contaminated or in the immediate proximity of contaminated systems that could result in a worker dose. 10. Use of Funds The regulation at 10 CFR 50.75(f)(2) requires licensees at or about 5 years before the projected end of operations to submit a preliminary site-specific decommissioning cost estimate that includes an up- to-date assessment of the major factors that could affect the cost to decommission. Prior to or within 2 years following permanent cessation of operations, 10 CFR 50.82(a)(4)(i) and 10 CFR 52.110(d)(1) require licensees to submit a PSDAR, which must contain a site-specific decommissioning cost estimate. Additionally, 10 CFR 50.54(bb) requires licensees to submit an IFMP, including the projected cost of