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:
y field data and that conservative site-specific hydro- logic parameters are used. Furthermore, conservatism.must be the guide in selecting the proper model to represent a specific physical situation. Radioactive decay and sediment adsorption may be considered, if applicable, providing that the adsorption factors are conservative and site-specific. Regulatory Guide 1.113 provides guidance in selecting and using surface water models. III. REVIEW PROCEDURES Section 2.4.13 of the applicant's SAR is reviewed to identify any missing data, information or analysis necessary for the staff's evaluation. Applicant responses to the requested information will be evaluated using the methods out- lined below and staff positions will be deveToped. Resolution, if possible, of differences between the staff's and the applicant's estimation of liquid effluent dispersion will be coordinated through the LPM; and the SER will be written accordingly. The staff will make independent calculations of the transport capabilities and potential contamination pathways of the groundwater environment under accidental conditions with respect to existing and future users. Special attention should be directed to proposed facilities with permanent dewatering systems to assure that pathways created by those systems have been identified. The staff will, in consultation with the Effluent Treatment Systems Branch (ETSB), choose the accident scenarios leading to the most adverse contamination of the groundwater or the surface water via the groundwater pathways. Analysis of the contamina- tion will commence with the simplest models, such as those presented in Refer- ences 21 and 22, using demonstrably conservative assumptions and coefficients. Dilutions and travel times (or alternatively, concentrations directly) result- ing from the preliminary analyses will then be checked by ETSB to determine acceptability. If the indicated concentrations of radionuclides, identified by ETSB, are less than the values