Document: NRC Regulatory Guide
Document ID: 42f2dcf0-38ba-4f75-84d4-e60f4bbf9162
Document Type: regulatory_guide
Title: Assessment of Abnormal Radionuclide Discharges in Ground Water to the Unrestricted Area at Nuclear Power Plant Sites Appendix-Simple Ground Water Model for Estimating Offsite Tritium Activity Flux + HISTORY - HISTORY 12/2015 – DG-4025-Proposed New Guide
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML1523/ML15237A388.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.25
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CFR Title: 

Content:
needed to be addressed. In March 2006, the NRC formed the Liquid Radioactive Release Lessons Learned Task Force (LLTF) to evaluate the liquid radioactive releases and to make recommendations. The task force summarized the result of its evaluation in September 2006 and offered recommendations for addressing the inadvertent releases to the subsurface (Ref. 14). Among them was a recommendation (3.5.4) that NRC should consider the development of guidance for evaluating radionuclide transport in ground water. It went on to note that ANSI/ANS 2.17-1980 provided guidance and that it was being extensively updated at that time. The update was released for use as ANSI/ANS 2.17-2010 (Ref. 15). Industry took action to address inadvertent abnormal releases of radioactivity in ground water. In August 2007, the Nuclear Energy Institute (NEI) issued NEI 07-07 “Industry Ground Water Protection Initiative (GPI)–Final Guidance Document” (Ref. 16). Subsequently, all operating and decommissioning power plants adopted the initiative. The program involves development of a ground water site model; onsite ground water monitoring, which includes installation of monitoring wells; and a remediation process and reporting requirements. To determine if the commitments set forth in NEI 07-07 were implemented, NRC issued NRC Inspection Manual/Temporary Instruction 2515/173, Revision 1, “Review of the Implementation of the Industry Ground Water Protection Voluntary Initiative,” (Ref. 17). The Electric Power Research Institute (EPRI) provided NEI supporting guidance for the ground water protection initiative. In 2005 it issued EPRI Report 1011730, “Groundwater Monitoring Guidance for Nuclear Power Plants,” (Ref. 18), and in 2007 it issued EPRI Report 1015118, “Groundwater Protection Guidelines for Nuclear Power Plants,” (Ref. 19). In October 2009, NEI issued NEI-08-08A, Revision 0, “Generic FSAR Template Guidance for Life Cycle Minimization of Contamination” (Ref. 20). NEI