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:
ions of radionuclides, identified by ETSBPERB, are less than the values 15 identified in 10 CFR Part 20, Appendix B, Table II2, Column 2, no further computational 16 DRAFT Rev. 3 - April 1996 2.4.13-4 efforts will be warranted. Further analyses using progressively more realistic and less conservative modeling techniques, such as those of References 13 and 2524, will be undertaken 17 if the preliminary results are not acceptable. Independent calculations will be made of liquid effluent transport for the surface pathways identified. For preliminary analysis, the staff will employ simplified calculational procedures or models, such as those contained in References 3 and 9. The analysis will be performed using demonstrably conservative coefficients and assumptions, and the physical conditions (such as lowest recorded river flow) likely to give the most adverse dispersion of the liquid effluent. The applicant's model assumption and results will be compared with the staff's results to assure ensure that the results are comparably conservative. The estimation of liquid effluent dispersion will reflect potential future changes that might result from variations in use by known future surface and groundwater users. Concentrations of radionuclides in the body of water under consideration will be calculated based on the staff's dispersion computations and with initial concentrations provided by the Effluent Treatment Systems Branch (ETSB)PERB for the most critical event. Acceptability of 18 the resultant concentrations of radioactive effluent at the points of interest will be determined by consultation with ETSBPERB. If the concentrations of the diluted liquid effluents computed 19 by the staff are within acceptable limits of Appendix B, Table II2, Column 2, of 20 10 CFR Part 20, no further computation effort is indicated. If the concentrations computed by conservative simplified methods exceed the limits of 10 CFR Part 20, more precise and less conservative models, such as