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:
of license termination, and will help to determine whether existing financial assurance provided for site-specific decommissioning is adequate. Requirements The DPR requires licensees to minimize the introduction of significant residual radioactivity into the site and to perform radiological surveys to identify the extent of contamination at their sites, including the subsurface, that are reasonable under the circumstances to evaluate concentrations or quantities of residual radioactivity. The term “residual radioactivity” is defined in 10 CFR 20.1003, “Definitions,” as radioactivity in structures, materials, soils, groundwater , and any other media at a site resulting from activities under the licensee’s control. “Significant” residual radioactivity is characterized in the DPR as “a quantity of radioactive material that would later require remediation during decommissioning to meet the unrestricted use criteria of 10 CFR 20.1402.” The DPR broadens and clarifies the 1997 LTR as follows: 1. It extends from applicants to licensees the requirements for operations to be conducted in a manner to minimize contamination, but does not mandate any design changes to operating facilities; 2. It explicitly includes the subsurface in the radiological surveys required of all licensees by 10 CFR 20.1501(a); 3. It establishes a threshold for when residual radioactivity becomes “significant” residual radioactivity; and DG-4014, Page 3 4. It requires all licensees to retain 10 CFR 20.1501(a) survey results with records important to decommissioning (it does not require licensees to submit reports of survey results). Although the DPR does require subsurface surveys, it does not require the extensive site characterization and compliance surveys that are required 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