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:
by the staff are within acceptable limits of Appendix B, Table II, Column 2, of 10 CFR Part 20, no further computation effort is indicated. If the concentra- tions computed by conservative simplified methods exceed the limits of 10 CFR Part 20, more precise and less conservative models, such as those used for hydrothermal prediction (Reference 10), and coefficients will be employed by the staff. IV. EVALUATION FINDINGS For construction permit (CP) reviews, the findings will summarize the applicant's and the staff's estimates of dilution factors, dispersion coefficients, flow velocities, travel times, and potential contamination pathways between the site and the nearest water user in conformance with 10 CFR Part 100. If the estimates are comparable, or if no potential problem exists, staff concurrence with the applicant's estimates will be stated. If the staff predicts substantially more conservative conditions, a statement of the staff basis will be made. For operating license (OL) reviews of plant designs that have had detailed reviews of severe accidental effluent releases at the CP stage, the CP conclusions will be referenced. If no CP review of effluent releases was undertaken of the scope indicated herein, this will be indicated. Any new potential pathways or changes in water usage that can be identified in the OL review will also be analyzed and reported. 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