Document: NUREG-0800
Document ID: 9b40c173-6ada-4f6a-a9a7-836e7c62d015
Document Type: srp
Title: ACCIDENTAL RELEASES OF LIQUID EFFLUENTS IN GROUND AND SURFACE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070263.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.13
CFR Part: 
CFR Title: 

Content:
ys or changes in water usage that can be identified in the OL review will also be analyzed and reported. 2.4.13-5 DRAFT Rev. 3 - April 1996 Sample statements for CP reviews follow: The staff concludes that the plant meets the requirements of 10 CFR Part 100 with respect to potential accidental releases of radioactive liquid effluents. This conclusion is based on the following analysis: A postulated failure of the miscellaneous waste collection tank (the tank outside of containment with the highest radioactive inventory) was analyzed to estimate the concentration of radioactive contaminants in nearby wells. The contents of the tank were conservatively assumed to enter the groundwater instantaneously, and the nuclides were assumed to travel with the water with no credit taken for ion exchange processes. The nearest downgradient potable water well is located 880 meters (2900 feet) northeast of 22 the plant. Assuming a very high permeability of 1500 x 10 centimeters15 micrometers -6 (590 microinches) per second, the travel time to the nearest down gradient potable well 23 was 9.5 years. The calculated concentrations of all nuclides were well below the maximum permissible concentrations listed in 10 CFR Part 20, Appendix B, Table II2. 24 In this analysis, it was also assumed that the contents of the tank traveled with the groundwater to A Creek. It was then assumed to mix with creek water, flow into Lake B, and then to the water supply intake for the city of C. Concentrations at the water supply intake for the city of C were also small fractions of 10 CFR Part 20 limits for all nuclides. A postulated failure of the distillate storage tank, which will be located in the plant yard, was also analyzed. It was conservatively assumed that the entire contents of the tank are introduced, as a slug release, into Lake B at the mouth of A Creek. (In reality, a failure of this tank would result in effluent flowing through the site drainage to A Creek, where it would be diluted