Document: NRC Regulatory Guide
Document ID: d812c779-c17b-4eb3-9d66-b532cd68bd03
Document Type: regulatory_guide
Title: Decommissioning Planning During Operations + HISTORY - HISTORY 12/2011 – DG-4014 , Proposed New Guide
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML1115/ML111590642.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.22
CFR Part: 
CFR Title: 

Content:
by decommissioning regulations and defined in NUREG-1575, “Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM),” Revision 1, issued August 2000 (Ref. 6). Further, it does not set decommissioning criteria, nor does it mandate any remedial activities of onsite or offsite residual radioactivity during operations. The DPR does not require licensees to conduct complex, detailed site surveys. Rather, the DPR does require licensees to conduct scoping surveys to identify the extent of significant residual radioactivity. For nuclear power plants, existing radiological environmental monitoring programs and subsurface (ground water) monitoring conducted by implementation of the Nuclear Energy Institute’s (NEI’s) Ground Water Protection Initiative (Ref. 7) is generally considered adequate to meet the DPR. However, the DPR does require that the results of the monitoring and surveys be included in records important to decommissioning. Neither the DPR nor this regulatory guide defines a specific number of monitoring, surveying, or sampling events to comply with the new requirements. Because of the wide diversity of licensee facilities and processes and the equally wide variation in site conditions, each licensee must develop its own site specific surveillance and monitoring plan and procedures for: 1. Demonstrating that the facility is being operated in a manner that minimizes the introduction of radiological contamination into the environment. 2. Performing surveys sufficient to determine the extent of significant residual radioactivity contamination in the site environment. 3. Periodically evaluating the costs to remediate significant residual radioactivity to unrestricted release levels at the time of license termination. Changes to financial assurance regulations require licensees to include the results of this evaluation in required decommissioning cost and financial assurance updates. The DPR also requires licensees, other than power reactors, to