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:
important input to the historical site assessment required by the decommissioning section of the NRC’s licensing regulations. Once this information is collected, licensees should use it in revising decommissioning cost estimates, as appropriate to license type requirements. Nuclear power plant licensees should include it in the decommissioning cost estimates required by 10 CFR 50.75(f)(3) and 10 CFR 50.82(a)(8)(iii). Other licensees should adjust financial assurance for decommissioning to reflect the necessary remediation to meet unrestricted release criteria at the time of license termination. See NUREG-1757, Volume 3, Revision 1, “Financial Assurance, Recordkeeping, and Timeliness,” issued 2011 (ADAMS Accession No. ML090850301), for additional information. If a licensee has adjusted its financial assurance in response to previous contamination events, it could elect to conduct partial site remediation during operations. If this results in a decrease in the remaining remediation necessary to meet unrestricted release limits, it could also result in a decrease in the required trust fund amount. The staff encourages licensees to evaluate the total costs of prompt versus delayed remediation. Nothing in the DPR mandates remediation during operations. APPENDIX A-2 EXCERPTS FROM PERTINENT REGULATIONS Appendix A-2 to DG-4014, Page A-2-8 10 CFR 20.1003, “Definitions” Residual radioactivity means radioactivity in structures, materials, soils, groundwater, and other media at a site resulting from activities under the licensee’s control. This includes radioactivity from all licensed and unlicensed sources used by the licensee, but excludes background radiation. It also includes radioactive materials remaining at the site as a result of routine or accidental releases of radioactive material at the site and previous burials at the site, even if those burials were made in accordance with the provisions of 10 CFR part 20. 10 CFR 20.1101, “Radiation Protection