Document: NUREG-0800
Document ID: e9416315-bef5-4651-b3dd-6724d6bc345a
Document Type: srp
Title: ACCIDENTAL RELEASES OF LIQUID EFFLUENTS IN GROUND AND SURFACE WATERS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340559.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.13
CFR Part: 
CFR Title: 

Content:
he 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 2900 feet north- east of the plant.. Assuming a very high permeability of.1500 x 10-6 centimeters per second, the travel time to the nearest down gradient potable well 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 II. In this analysis, it was also assumed that the contents of the tank traveled with the ground- .water 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. 2.4.13-3 Rev. 2 - July 1981 Concentrations at the water supply intake for the city of C were also small fractions of 10 CFR fart 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 before entering the lake.) Our analysis showed that the concentration of all nuclides would be small fractions of the 10 CFR Part 20 limits at the water supply intake for the city of-C. Additional discussion of the radiological consequences of the postu- lated tank failures described above is provided in Section 15.3 of this report. V. IMPLEMENTATION The following is intended to provide guidance to applicants and licensees regarding the NRC staff's plans for using this SRP section. Except in those cases in which the applicant proposes an acceptable alternative method for