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
CFR Part: 
CFR Title: 

Content:
ng anticipated operational occurrences. Sufficient holdup capacity shall be provided for retention of gaseous and liquid effluents containing radioactive materials, particularly where unfavorable site environmental conditions can be expected to impose unusual operational limitations upon the release of such effluents to the environment. – GDC 64, “Monitoring Radioactivity Releases,” requires that a means shall be provided for monitoring, among other things, the facility environs for radioactivity that may be released from normal operations, including anticipated operational occurrences, and from postulated accidents. • 10 CFR Part 52 “Licenses, Certifications, and Approvals for Nuclear Power Plants,” provides for the licensing of early site permits, standard design certifications and combined licenses for nuclear power plants. – 10 CFR 52.47(a)(6) requires that the Final Safety Analysis Report (FSAR) includes the information in 10 CFR 20.1406. DG-4025, Page 3 – 10 CFR 52.47(a)(22) requires that the FSAR includes the information to demonstrate how operating insights has been incorporated into the plant design. • 10 CFR Part 100, “Reactor Site Criteria,” requires the NRC to consider population density; use of the site environs, including proximity to manmade hazards; and the physical characteristics of a site, including seismology, meteorology, geology, and hydrology, in determining the site’s acceptability for a nuclear power reactor. – 100.20(c)(3) requires that factors important to hydrological radionuclide transport (such as soil, sediment and rock characteristics, adsorption and retention coefficients, ground water velocity, and distances to the nearest surface body of water) must be obtained from on-site measurements. Related Guidance • RG 1.21, “Measuring, Evaluating, and Reporting Radioactive Material in Liquid and Gaseous Effluents and Solid Waste” (Ref. 5), contains information on the monitoring of leaks and spills, as well as